1. 전자회로 개요 기초 이론 Diode Transistor (MOSFET, BJT) 전자회로 1
Differential Amplifier
Frequency response
Feed back
Operational amplifier
Digital circuit (Logic, Memory, …)
Analog circuit
Filters & tuned amplifier
Oscillator
Power amplifier
전자회로 1
전자회로 2

2. Two port network parameters

3. Admittance parameters
Two port network
The network contains No independent sources
Admittance parameter

4. Measurement of Y-parameters
The computation of the parameters follows directly from the definition + + - -

5. Example Find the admittance parameters for the network
Next we show one use of this model

6. An application of the admittance parameters
Determine the current through the 4 Ohm resistor
The model plus the conditions at the
ports are sufficient to determine the
other variables.

7. Impedance parameters + + + - + - - -

8. Example
Find the Z parameters
Write the loop equations
Rearranging,

9. hybrid parameter + + - - + + - -

10. Transmission(ABCD) parameter+ + - -

11. Cascade of networks + + + - - - + + - -

12. Example
Determine the transmission parameters

13. Cascade of networks

14. MOSFET

15. MOSFET 구조 Insulator: Silicon dioxide or Polysilicon
Substrate: Single crystal silicon wafer
Gate: Electrode

16. Channel Induced with Positive Gate-Source Voltage

17. MOS operation : no Drain-Source bias
(1)
Gate전압이 없을 때 pn-np diode 두 개가 붙어 있는 형태이어서 전류의 흐름이 없다.
(2)
Gate에 약간의 (+)전압을 가해주면 p-type 반도체에 있던 hole들이 멀리 밀려나고, gate 주변은 depletion영역으로 된다.

18. MOS operation : with Drain-Source bias
(3)
(4) 전하
전기장 전압
전자 흐름
에너지 band

19. (3)
Gate역할
drain
source

20. Large signal equivalent
Equivalent circuit
Early effect

21. Small signal equivalent

22. Bias point + small signal equivalent
DC bias point : +

23. Small signal parameter extraction

24. Equivalent circuits of MOSFET

25. Bipolar Junction transistor
Heater
cathode
grid
anode
진공관(3극관)과 동작원리 같음.

26. Equivalent circuits of BJT

27. MOSFET equivalent circuit : Admittance parameter

28. Admittance-to-ABCD parameter transform

29. Amplifier spec. from ABCD parameters
output impedance
Signal source
input impedance
Load resistance
(1) Voltage gain
(2) Current gain
(3) Input impedance
(4) Output impedance

30. The three basic MOSFET amplifier configurations.

31. Network parameter for basic MOS amplifiers
Common source amplifier
Common gate amplifier

32. Network parameter for basic amplifiers
Common drain amplifier

33. Amplifier parameter for basic MOSFET amplifiers
Type
Voltage gain
Input impedance
Output impedance
Common source
Common gate
Common drain

34. The three basic BJT amplifier configurations.

35. Network parameter for basic BJT amplifiers
Common emitter amplifier
Common base amplifier

36. Common collector amplifier

37. Amplifier parameter for basic BJT amplifiers
Type
Voltage gain
Input impedance
Output impedance
Common emitter
Common base
Common collector

38. Ideal voltage amplifier
입력 임피던스 : 무한대
출력 임피던스 : 0
Signal source
(input impedance)
(Output impedance)
Load
Output impedance
input impedance + + - -
Voltage gain
Feed back ratio → 0

39. Ideal current amplifier
입력 임피던스 : 0
출력 임피던스 : 무한대
Signal source
(input impedance)
(Output impedance)
Load
Output impedance
input impedance + + - -
Current gain
Feed back ratio → 0

40. Series of unilateral amplifiers (zero feed-back)
Signal source
Load + + + - - -