Ppt on rc coupled amplifier circuit

electronics fundamentals

discharging. Universal exponential curves Specific values for current and voltage can be read from a universal curve. For an RC circuit, the time constant is Rising (charging) exponential Falling (discharging) exponential Any capacitor will charge in 5 time constants/smoothes the pulsating dc from the rectifier. Coupling capacitors Coupling capacitors are used to pass an ac signal from one stage to another while blocking dc. The capacitor isolates dc between the amplifier stages, preventing dc in one stage /


1 Conventional amplifier Collector Emitter Base Rb1 Rb2 Rc ReCe RL Vcc Vin Vout Av = Vout/Vin = - (Rc//RL) / re re = ac resistance of the emitter.

Rc//RL) / re re = ac resistance of the emitter 2 High-frequency transformer- coupled amplifier Collector Emitter Base Rb1 Rb2 RL Re Ce Vcc C1 Vin Vout f = 1 / (2 pi sqrt(L C1) Q = f / B L Example 2.1 3 Practical common emitter amplifier/ Collector Base VLOVin Collector Base VLOVinVLOVinVLOVin Pull in phenomena More commonly used Good for high frequencies 30 Balanced mixers A multiplier circuit, where the output amplitude is proportional to the product of two input signals, can be used as a balanced mixer /


1 Conventional amplifier Collector Emitter Base Rb1 Rb2 Rc ReCe RL Vcc Vin Vout Av = Vout/Vin = - (Rc//RL) / re re = ac resistance of the emitter.

= - (Rc//RL) / re re = ac resistance of the emitter 2 High-frequency transformer- coupled amplifier Collector Emitter Base Rb1 Rb2 RL Re Ce Vcc C1 Vin Vout f = 1 / (2 pi sqrt(L C1) Q = f / B L Example 2.1 3 Practical common emitter amplifier with better /, find the transmitting frequencies at the two extremes of the operating range Temperature dependence 25 Mixers A mixer is a nonlinear circuit that combines two signals in such a way as to produce the sum and difference of the two input frequencies at the/


1 Chap. 7 Response of First-Order RL and RC Circuits Contents 7.1 The Natural Response of an RL Circuit 7.2 The Natural Response of an RC Circuit 7.3 The.

Circuit 7.2 The Natural Response of an RC Circuit 7.3 The Step Response of RL and RC Circuits 7.4 A General Solution for Step and Natural Responses 7.5 Sequential Switching 7.6 Unbounded Response 7.7 The Integrating Amplifier Objectives 1. 能定出 RL 和 RC 電路的自然響應。 2. 能定出 RL 和 RC 電路的步階響應。 3. 知道如何分析具有順序切換的電路。 4. 能分析含有電阻和單一電容的運算放大器電路。 Two forms of the circuits/RL Circuit’s Step Response The switch has been open for a long time. Also, 21 EX 7.10 Determining Step Response of a Circuit with Magnetically Coupled Coils /


Audio Power Amplifier (APA) Operation and Measurement

amp Noise coupled into inputs is amplified to the outputs 1 1 Noise on output 2 2 RF coupled into inputs or outputs can cause RF Rectification – BAD! 2 Noise on output Inverting amp Class-D Audio Power Amplifier Operation Benefits Block Diagram and Circuit Description of / because extreme slew rates of Class-D waveforms cause slew-induced distortion in their input stages. A first-order RC filter with time constant around 4.7μS eliminates this problem in most cases. At high gains such analyzers may require /


ECE 206L Lecture Notes ECE 206L 1.

of the oscilloscope. Vertical Sensitivity The vertical sensitivity indicates how much the vertical amplifier can amplify a weak signal. Vertical sensitivity is usually given in millivolts (mV) per / to a certain number of divisions. Input Coupling Coupling means the method used to connect an electrical signal from one circuit to another. Position and Seconds per Division /One Farad= one(coulomb/volts) 1F=1C/V RC Circuits qualitative description assume the switch is thrown to position B at the time t = /


CMOS Digital Integrated Circuits

-poly = 3  20 = 60  An Example of NOR ROM Array (Cont.) The poly word line can be modeled as a RC transmission line with up to 256 transistors The row access time trow: delay associated with selecting and activating 1 of 128 word lines in ROM/differential Current-Mirror Amplifier Sense Circuit VDD VC VON CK Typical Dynamic Response for One and Two Stage Sense Amplifier Circuits 5 4 3 2 1 10 15 20 25 30 t (nsec) Voltage (V) Output-2 Stage Output-1 Stage VC Cross-Coupled nMOS Sense Amplifier bit line C /


Audio Amplifiers Basics, Circuits and Parameters

current gain β=100 We calculate Uce = Uz-Uce_sat=12v-0,9V=11,1V We calculate maximum collector current Uce/Rc=11,1V/1kΩ=11,1mA Let’s chose operating point in the middle of load line (Uwy=5,5V oraz /. However, the A-class amplifier input circuit was replaced by a differential amplifier. Differential amplifier Amplifier whose output voltage depends on the voltage difference between the inputs of the amplifier. In its simplest version is composed of two transistors coupled together via an emitter resistor /


1 TRANSISTOR AMPLIFIER CONFIGURATION -BJT Common-Emitter Amplifier- By: Syahrul Ashikin Azmi School of Electrical System Engineering.

circuit Voltage divider biasing -> set Q-point Coupling capacitor -> dc isolation between amplifier and signal source Emitter at ground -> common emitter Dc voltage -> power the amplifier 5 Rules in dc analysis Replacing all capacitors by open circuit. Replacing all inductors by short circuit. Replacing ac voltage source by short circuit/ to find VCEQ; 30 Example 4 Let β=120, R1=175kΩ, R2=250kΩ, RC=10kΩ, RE=20kΩ and VBE(on)=0.7V. For the given circuit, i) Find RTH, VTH and Q-points. ii) Sketch dc load line /


1 TRANSISTOR AMPLIFIER CONFIGURATION -BJT Common-Emitter Amplifier- By: Syahrul Ashikin Azmi School of Electrical System Engineering.

circuit Voltage divider biasing -> set Q-point Coupling capacitor -> dc isolation between amplifier and signal source Emitter at ground -> common emitter Dc voltage -> power the amplifier 5 Rules in dc analysis Replacing all capacitors by open circuit. Replacing all inductors by short circuit. Replacing ac voltage source by short circuit/ to find VCEQ; 30 Example 4 Let β=120, R1=175kΩ, R2=250kΩ, RC=10kΩ, RE=20kΩ and VBE(on)=0.7V. For the given circuit, i) Find RTH, VTH and Q-points. ii) Sketch dc load line /


1 POWER AMPLIFIERS (Transformer Coupling). 2 Class-A The theoretical maximum efficiency of a basic RC- coupled class-A amplifier is limited to 25%. In.

Class-A The theoretical maximum efficiency of a basic RC- coupled class-A amplifier is limited to 25%. In practical circuit, the efficiency is less than 25%. Used for output power of about 1 W only. Transformer coupling can increase the maximum efficiency to 50% Disadvantage of transformer coupling – expensive & bulky. 3 Transformer-coupled common-emitter amplifier Neglecting transformer resistance and assuming R E is small; 4 For/


Chapter 10 RC Circuits. Objectives Describe the relationship between current and voltage in an RC circuit Determine impedance and phase angle in a series.

resistor. The result is a high-pass filter. AC Coupling An RC network can be used to create a dc voltage level with an ac signal superimposed on it. This is often found in amplifiers, where the dc voltage is required to bias the amplifier. Summary When a sinusoidal voltage is applied to an RC circuit, the current and all the voltage drops are also sine/


Chapter 10 RC Circuits (sine wave). Objectives Describe the relationship between current and voltage in an RC circuit Determine impedance and phase angle.

. High Pass Filter (Frequency cutoff) = Time Constant = RC fc = frequency cutoff AC Coupling An RC network can be used to create a dc voltage level with an ac signal superimposed on it. This is often found in amplifiers, where the dc voltage is required to bias the amplifier. Summary When a sinusoidal voltage is applied to an RC circuit, the current and all the voltage drops are/


Chapter 1 - Introduction to Electronics Introduction Microelectronics Integrated Circuits (IC) Technology Silicon Chip Microcomputer / Microprocessor Discrete.

1.25 Circuit for Example 1.5. Figure 1.26 Frequency response for (a) a capacitively coupled amplifier, (b) a direct-coupled amplifier, and (c) a tuned or bandpass amplifier. Figure 1.27 Use of a capacitor to couple amplifier stages. / Frequency Response of Amplifiers Bandwidth RC Circuits – Class Exercise (a) Magnitude and (b) phase response of STC networks of the low-pass type. Frequency Response of Amplifiers Bandwidth Frequency Response of Amplifiers Frequency Response of Amplifiers Bandwidth (a) /


Intermediate elements

often suffer from poor linearity and even worse errors DEEPAK P SNGCE Isolation Amplifier Capacitors allow alternating current to flow, but block direct current . They couple ac signals between circuits at different direct voltages. DEEPAK P SNGCE Bridges Bridges offer an attractive /Bridge The Wien bridge is a type of bridge circuit that was developed by Max Wien in 1891 The bridge comprises four resistors and two capacitors. Wien Bridge  has a series RC combination in one and a parallelcombination in the /


Power Amplifiers Unit – 4.1 Classification of Power Amplifiers  Power amplifiers are classified based on the Q point  If the operating point is chosen.

impedance of the speaker Class A Audio Amplifier 270 K5.6 K Re Rb1 Rb2 Ce Rc Vcc 270 K Re Rb1 Rb2 Ce Drawback  The drawback of this circuit is that it cannot handle large signals  In a Class A amplifier, the operating point is chosen around/  This type of amplifier is called Push-Pull Amplifier Class B Push-Pull Vcc T1T1 T2T2 T3T3 TR 2 TR 1 Push-Pull Circuit  TR1 and TR2 are output transistors connected back to back, with their emitters grounded  The output transformer TR1 couples the push-pull output /


Power Amplifiers Unit – 4.1 Classification of Power Amplifiers  Power amplifiers are classified based on the Q point  If the operating point is chosen.

impedance of the speaker Class A Audio Amplifier 270 K5.6 K Re Rb1 Rb2 Ce Rc Vcc 270 K Re Rb1 Rb2 Ce Drawback  The drawback of this circuit is that it cannot handle large signals  In a Class A amplifier, the operating point is chosen around/  This type of amplifier is called Push-Pull Amplifier Class B Push-Pull Vcc T1T1 T2T2 T3T3 TR 2 TR 1 Push-Pull Circuit  TR1 and TR2 are output transistors connected back to back, with their emitters grounded  The output transformer TR1 couples the push-pull output /


TE4201-Communication Electronics 1 11. FM Receiver Circuits. FM Reception FM Reception RF Amplifiers RF Amplifiers Limiters Discriminators Phase-Locked.

amplifier AF and power amplifier Discriminator circuit Limiter circuit De-emphasis circuit RF amplifier AGC Demodulated Signal FM receiver Demodulated Signal FM Reception TE4201-Communication Electronics 3 Broadcast AM receivers normally operate quite satisfactorily without RF amplifiers/ and the RFC ensure that the signal not to coupled into dc supply. RFC opens for RF signals and/ noise. A transistor limiter is shown has the dropping resistor RC which limits the dc collector supply voltage. This provides a /


Electronic Troubleshooting

the output to R14-R15 It is a large cap for the AC signals that are amplified It and the equivalent resistance have an RC time constant much larger than the period of the signal It doesnt discharge under normal operation/ positive and it turns on – output goes neg Quasicomlementary Amps Characteristics Actual circuit See page 144 Power Amplifier circuit is shown in the shaded area Transformer-coupled Push-pull Circuit Characteristics Input to the power transistors is through a transformer Center tapped Bases/


Chapter 10 Analog Systems

above wC: phase =900 Jaeger/Blalock 7/1/03 Microelectronic Circuit Design McGraw-Hill Chap10 - 27 Microelectronic Circuit Design RC Low-pass Filter Problem: Find voltage transfer function Approach: Impedance of the where capacitor is 1/sC, use voltage division Jaeger/Blalock 7/1/03 Microelectronic Circuit Design McGraw-Hill Chap10 - 28 High-pass Amplifier: Description True high-pass characteristic impossible to obtain as it/


Lab #4: RC and RL Circuits

. Make sure it goes on ground side of cap when measuring it instrumentation amplifier: needed when measuring voltage across R calculate RC from the values in the circuit measure the RC time constant (t), which is the time to drop to 0.37% of/centered at zero. Remember: Hints When wiring circuit, use black wires only for portions of circuit at ground. When wiring the circuit, first wire everything except the scope. Add it last. Be sure scope is DC coupled (AC coupling adds an extra capacitor, beyond the one/


Lab #4: RC and RL Circuits remember what capacitors and inductors are remember why circuits containing them can have currents that change with time.

at ground. Make sure it goes on ground side of cap when measuring it instrumentation amplifier: needed when measuring voltage across R calculate RC from the values in the circuit measure the RC time constant (  ), which is the time to drop to 0.37% / at zero. Remember: Hints When wiring circuit, use black wires only for portions of circuit at ground. When wiring the circuit, first wire everything except the scope. Add it last. Be sure scope is DC coupled (AC coupling adds an extra capacitor, beyond the one/


© REP 8/16/2015 EGRE224 Electronics - Operational Amplifiers Page c2.1-1 Introduction  The basic operational amplifier or Op Amp is a very important circuit.

Opamps are direct-coupled (DC) or direct current (DC) amplifiers.  DC amplifiers have many applications but can also pose some practical problems  IDEAL  IDEAL opamps amplify from zero /amplifier circuit (using an ideal opamp) R i =R 1 R o =0 © REP 8/16/2015 EGRE224 Electronics - Operational Amplifiers Page c2.1-16 Example 2.1  Consider the inverting amplifier/applied to a Miller integrator. Find the value of the time constant RC such that the triangular waveform at the output has a 20 Volt peak-/


UNIT- III SEQUENTIAL LOGIC CIRCUITS. Static Latches and Registers The Bistability Principle: Static memories use positive feedback to create a bistable.

amplifier circuits accept small input signals and amplify them to generate rail-to-rail swings. There are many techniques to construct these amplifiers, with the use of feedback (e.g., cross-coupled inverters). Sense-Amplifier Based Registers Positive edge-triggered register based on sense-amplifier The circuit uses a precharged front-end amplifier/ is just a wire –And possibly an inverter for clkb On practical chips, the RC delay of the wire resistance and gate load is very long –Variations in this delay/


Bipolar Junction Transistor Amplifier

resistance, RL from changing the dc bias voltages at the base and collector. Only ac component reaches load because of the capacitive coupling. A Graphical Picture Vb produce Ib that varies above and below Q-point on ac load line, also Ic and Vce. /with RC and is less than dc collector resistance RC. Example : Let Q as the selected operating point (quiescent point). If Ib varies about 10 µA, find Vce and Ic variations 3.2 Transistor ac model To visualize the operation of a transistor in an amplifier circuit,/


Lab #4: RC and RL Circuits remember what capacitors and inductors are remember why circuits containing them can have currents that change with time.

at ground. Make sure it goes on ground side of cap when measuring it instrumentation amplifier: needed when measuring voltage across R calculate RC from the values in the circuit measure the RC time constant (  ), which is the time to drop to 0.37% of/that big or bigger… Hints When wiring circuit, use black wires only for portions of circuit at ground. When wiring the circuit, first wire everything except the scope. Add it last. Be sure scope is DC coupled (AC coupling adds an extra capacitor, beyond the /


Experiment 4 * Part A: Introduction to Operational Amplifiers

was used before high gain circuits became available. Op-Amp Circuits use Negative Feedback Negative feedback couples the output back in such a way as to cancel some of the input. Amplifiers with negative feedback depend less /amp circuit will invert the signal and multiply the mathematical amplitude by RC (differentiator) or 1/RC (integrator) Part D Adding and Subtracting Signals Op-Amp Adders Differential Amplifier Op-Amp Limitations Analog Computers Adders Weighted Adders Unlike differential amplifiers, /


Part B-5 OSCILLATORS: Condition for oscillations. RC-phase oscillator with transistor and FET, Hartley and colpitts oscillators, Wien bridge oscillator,

unity) – The voltage gain around the closed feedback loop (A cl ) is the product of amplifier gain (A v ) and the attenuation (B) of the feedback circuit A cl = A v B Start-Up Conditions For oscillation to begin, A cl around the positive/: ii. C1=C2=C3 and R1=R2=R3. Ttherefore : Phase Shift Oscillator The phase shift oscillator utilizes three RC circuits to provide 180º phase shift that when coupled with the 180º of the op- amp itself provides the necessary feedback to sustain oscillations. The gain must be /


Electronic Circuits in an Automotive Environment Herman Casier AMI Semiconductor Belgium

pumping) in the signal path: important disturbing effect on a chip. o Inductive coupling to adjacent devices or structures : only important for bondwires and leadframe e.g. 100mA /static with zener diodes (clamped load dump) e.g. dynamic limitation with RC (all other pulses) e.g. reverse battery protection diode o Peak /. Finvers, J. W. Haslett, F.N. Trofimenkoff, “A High Temperature Precision Amplifier”, IEEE Journal of Solid-state Circuits, vol. 30, pp 120-128, February 1995. tPaul C. de Jong, “/


Introduction to Operational Amplifiers w Operational Amplifiers w Op-Amp Circuits The Inverting Amplifier The Non-Inverting Amplifier.

was used before high gain circuits became available. Op-Amp Circuits use Negative Feedback w Negative feedback couples the output back in such a way as to cancel some of the input. w Amplifiers with negative feedback depend less /circuit will invert the signal and multiply the mathematical amplitude by RC (differentiator) or 1/RC (integrator) Adding and Subtracting Signals w Op-Amp Adders w Differential Amplifier w Op-Amp Limitations w Analog Computers Adders Weighted Adders w Unlike differential amplifiers,/


LOW VOLTAGE OP AMPS We will cover: –Low voltage input stages –Low voltage bias circuits –Low voltage op amps –Examples Methodology: –Modify standard circuit.

bigger than Ro Choose C to be near or a couple times larger than Cgs of CMFB circuit. R R CC M6 M7 V ocmd M7t M7t’s are in triode R R CC Insert these Why RC in common mode detector V1 V2 R R Cgs V KCL at V: (V1 – V)/R + (V2/robustness to process and temperature variations Size of Mz can be parameter scanned so as to place zero to cancel the secondary pole of the amplifier In the Cc to cascode connection, Bias voltage can still be derived using current mirrors from a single current source,  still have /


Zo Tester Collin Wells. Original Zo Tester Original AOL Circuit.

Drive High-Z Node Final AOL Circuit Final AOL Circuit Results High-Pass Effects of AC Coupling Cap Fc = 1/2πRC Effects of DUT Cin and Zo of Buffer Circuits Final AOL Circuit Results Final AOL Circuit Limitations Final AOL Circuit Limitation Partial Fix False Summing / Terminate the gain/phase analyzer output and send into the input of a THS4631 high-speed amplifier. RS = 80.6 Example of Zout Limitation Zo Circuit not capable of 50 Ohm Drive –50Ohm termination on Vreference re-creates the previous problem of/


MULTISTAGE AMPLIFIERS

equal cutoff frequencies are cascaded, the cutoff frequencies and bandwidth of the multistage circuit are found using Introduction (cont.) Multistage amplifier configuration: Cascade /RC coupling Cascode Q2 Q1 Q2 Q1 Transformer coupling Darlington/Direct coupling i) Cascade Connection The most widely used method Coupling a signal from one stage to the another stage and block dc voltage from one stage to the another stage -The signal developed/


Figure 1.17 Model of an electronic amplifier, including input resistance Ri and output resistance Ro. © 2000 Prentice Hall Inc.

amplitude equal to the maximum allowed voltage output Copyright © Mcgraw Hill Company Slew Rate Linear RC Step Response: the slope of the step response is proportional to the final value of /fast simulation. Important amplifier circuits I Inverting amplifer AC-coupled inverting amplifier Summing amplifier Noninverting amplifier AC-coupled noninverting amplifier Bootstrap AC-coupled voltage follower Graphs from Prentice Hall Important amplifier circuits II Differential amplifier Instrumentation qualify Diff/


Digital Integrated Circuits A Design Perspective

Circuits/Predictable Interconnect Example: Dense Wire Fabric ([Sunil Kathri]) Trade-off: Cross-coupling capacitance 40x lower, 2% delay variation Increase in area and overall capacitance /dissipation Delay penalty is paid by the receiver Requires use of “sense amplifier” to restore signal level Frequently designed with differential signals Single-Ended /wiring network; local wires with high density and global wires with low RC 0.25 mm wiring stack Diagonal Wiring 20+% Interconnect length reduction destination /


MULTISTAGE AMPLIFIERS

resistance As a solution – transistor amplifier circuits can be connected in series or cascaded amplifiers This can be done either to increase the overall small-signal voltage gain or provide an overall voltage gain greater than 1 with a very low output resistance Multistage amplifier configuration Cascade /RC coupling Multistage amplifier configuration Cascode Multistage amplifier configuration Darlington/Direct coupling Multistage amplifier configuration Transformer coupling i) Cascade connection The most/


© Digital Integrated Circuits 2nd Interconnect Impact of Interconnect Parasitics Reduce Robustness Affect Performance Increase delay Increase power dissipation.

penalty is paid by the receiver  Requires use of “sense amplifier” to restore signal level  Frequently designed differentially (e.g. LVDS) © Digital Integrated Circuits 2nd Interconnect Single-Ended Static Driver and Receiver © Digital Integrated Circuits 2nd Interconnect INTERCONNECT © Digital Integrated Circuits 2nd Interconnect Impact of Resistance  We have already learned how to drive RC interconnect  Impact of resistance is commonly seen in power supply distribution/


Operational amplifier

,4 (larger than GND) Copyright © Mcgraw Hill Company Copyright © Mcgraw Hill Company Slew Rate Linear RC Step Response: the slope of the step response is proportional to the final value of the output, /simulation. Important amplifier circuits I Inverting amplifer AC-coupled inverting amplifier Summing amplifier Noninverting amplifier AC-coupled noninverting amplifier Bootstrap AC-coupled voltage follower Graphs from Prentice Hall Important amplifier circuits II Differential amplifier Instrumentation qualify /


Operational Amplifiers 1. Copyright  2004 by Oxford University Press, Inc. Microelectronic Circuits - Fifth Edition Sedra/Smith2 Introduction (The first.

ramp. This is a low-pass STC response. Output from capacitor of RC network ! Copyright  2004 by Oxford University Press, Inc. Microelectronic Circuits - Fifth Edition Sedra/Smith25 Figure 2.27 Effect of slew-rate limiting on/ output sinusoidal waveforms. 2.6.4 Full-Power Bandwidth 2.7 DC Imperfection 2.7.1 Offset Voltage Op amps are direct-coupled devices.They are prone to dc problems. With inputs being zero, the amplifier/


1CAS - Power Converters 10 May 2014Jörn Jacob: RF solid state amplifiers CAS – CERN Accelerator School on Power Converters Baden, 7 – 14 May 2014 RF Solid.

resonant output circuit 11CAS - Power Converters 10 May 2014Jörn Jacob: RF solid state amplifiers RF amplifier module: RF circuit Input balun Matching circuit Output balun Bias circuits Circulator 1200/ plate of the wing is part of the cavity wall with built on coupling loops  One collective shielding per wing  Less than half the size of/  = 3.8 Incident wave amplitude Reflected wave amplitude |r| = 1.5 Filtered reflection signal [RC=10  s] t [  s] Amplitude [a.u.] Measurement: P = |amplitude| 2 /


A Bias-Dependent Equivalent-Circuit Model of Evanescently Coupled Photodiode (ECPD) Advisers : J.- W. Shi, Y.- J. Chan Student : Y.- S. Wu.

communication system. To simplify the base station by eliminating the costly post amplifiers and cables. + Transmitter for Fiber-Radio Communication System + Mm-Wave Detector/Epi-layer structure: Partially p-doped photo-absorption layer Geometric structure: Evanescently coupled waveguide The ECPD We Used in Our Model Extraction!! Electrical Bandwidth (with / Ω Cp Csc Rt Ct CdxCj L RC delay time region (f RC ) Space charge screen effect region (f sc ) The Equivalent Circuit Model Transit time region (f t )/


Transferred-Substrate Heterojunction Bipolar Transistor Integrated Circuit Technology M Rodwell, Q Lee, D Mensa, J Guthrie, Y Betser, S Jaganathan, T Mathew,

high: velocity overshoot in InGaAs Base bandgap grading reduces transit time substantially RC terms quite important for > 200 GHz ft devices Excess Collector-Base /full-scale input Differential input will partly suppress ground noise coupling ~ 30 to 40 dB common-mode rejection feasible CMRR /AGC / limiting amplifier CML decision circuit PIN / transimpedance amplifier Delta-Sigma ADC In Development (300 HBTs) Transferred Substrate HBTs An ultrafast bipolar integrated circuit technology Ultrahigh fmax /


TECHNICAL QUIZ-I PREPARED BY G.JAYANTHI AP/ECE. 1. What is the output voltage, if a transistor amplifier has a voltage gain of 100 and input voltage is.

dc input resistance at the base of a BJT? A.β DCRC B. β DC (RC||RE ) C. β DC ·r e ′ D. β DCRE 18.Which transistor bias circuit provides good Q-point stability with a single-polarity supply voltage? A. Base bias B./ for common-base amplifier? A. Base. B. Collector. C. Emitter. D. Output. 42.What must be done to determine the dc equivalent circuit to analyze the common-emitter amplifier A. Leave circuit unchanged B. Replace coupling and bypass capacitors with opens C. Replace coupling and bypass capacitors /


Transformer Coupling.

LOAD LINE OPERATION maximum output voltage ‘ideal’ DC load line Q ac load line ‘Q’ point determined by BIAS CIRCUIT VCEQ = VCC 2VCC TRANSFORMER COUPLED AMPLIFIERS Advantages: electrical isolation: SAFETY NO XC voltage drop : if @ input higher efficiency : no RC power loss zero or 180 degree phase shift : DOT NOTATION impedance matching : better power transfer voltage / current transformation : can be used as a ‘gain/


Passive filters  Use Passive components (R, L, C)  Does not provide gain  Bulky inductors for low frequencies (not suitable for integration)  RC filters.

for low frequencies (not suitable for integration)  RC filters cannot realize Q > 0.5  Filters parameters are coupled (changing one component can change different filter parameters)  Cannot realize ideal integrator Integrated Circuits Chip micrograph Wi-Fi Receiver 17mm 2 Integrated Inductors /of signal source Op amp circuits are mostly dc-coupled amplifiers. Signals v o and v s may have a dc component representing a dc shift of the input away from Q-point. Op-amp amplifies both dc and ac components/


Chapter 4 without an external signal source Oscillator is an electronic circuit that generates a periodic waveform on its output without an external signal.

circuit containing three RC circuits in its feedback network called the phase-shift oscillator. The three RC circuits combine to produce a phase shift of 180 o. Chapter 4 This circuit is drawn to show clearly the amplifier and feedback network. Fig. 4: Phase-shift oscillator circuits/collector load and also prevents any ac signal from entering the dc supply. The coupling capacitor C C has negligible reactance at circuit operating frequency but blocks any dc flow between collector and base. The oscillation /


1 Broad-band and Scalable Circuit-level Models of MSM PD for Co-design with Preamplifier in Front-end Rx Applications Ph.D. Defense Spring, 2004 Cheol-ung.

RC time const. Transit time const. 14  Bandwidth of Square MSM PDs 3dB freq. of transit time const. 3dB freq. of RC/circuit Model  Equivalent-circuit model of pad and MSM PD 10 Gbps 20 Gbps 30 Gbps 17 Preamplifier: Performance Metrics  Key performance metrics of optical receiver  Bandwidth, Sensitivity, Noise, and Gain  Mainly determined by front-end (preamplifier and photodetector)  TransImpedance Amplifier/PEEC models include cross coupling terms. 26 Partial Element Equivalent Circuit (PEEC) Model Pad/


Unit-3 Tuned Amplifiers.  Frequency selectivity of resonant circuits allows a radio to be tuned to one of a set of transmitting stations.  Tuning is.

amplifiers  To amplify the selective range of frequencies, the resistive load, Rc is replaced by a tuned circuit.  The tuned circuit is capable of amplifying a signal over a narrow band of frequencies centered at fr. Tuned Circuits T YPES O F TUNED AMPLIFIERS Single tuned amplifier  one parallel tuned circuit/how tightly the resonator is coupled to its terminations. Instability of tuned circuits:  Transistor are used at the frequencies nearer to their unity gain BW to amplify narrow band of high /


CIT 852 – Electronic Signals and Systems Chapter 4: Analogue Amplifiers 4.1 Characteristics of Analogue Amplifiers 4.2 Feedback: Gain Control and Frequency.

the rest, or quiescent, condition) Powered by DeSiaMore 9 Basic Operation Common-emitter (voltage-divider) configuration (RC-coupled amplifier) Powered by DeSiaMore 10 Typical Characteristic Curves for Class-A Operation Powered by DeSiaMore 11 Typical Characteristic Previous /the ideas to find and 68Powered by DeSiaMore Applications Spring-mass-damper- Coulomb and viscous damper cases RLC circuit, and concept of analogous variables Solution of spring-mass-damper (viscous case) DC motor- Field current and/


Lab #3 and Lab 4: RC and RL Circuits Remember what capacitors and inductors are Remember why circuits containing them can have currents that change with.

ground. Make sure it goes on ground side of cap when measuring it instrumentation amplifier: needed when measuring voltage across R calculate RC from the values of the components measure the RC time constant (  ), which is the time to drop to 37% /zero. Remember: Hints When wiring a circuit, use black wires only for portions of the circuit at ground. When wiring the circuit, first wire everything except the scope. Add it last. Be sure scope is DC coupled (AC coupling adds an extra capacitor, beyond the one/


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