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**Introduction to Electronic Circuit Design**

Richard R. Spencer Mohammed S. Ghausi Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 1

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**Figure 10-1 Block diagram of a negative-feedback amplifier.**

(10.1) (10.2) (10.3) Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 2

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Figure 10-2 (a) The unilateral two-port model of an amplifier and (b) the same amplifier with negative feedback applied. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 3

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Figure A10-1 The four feedback topologies; (a) series-shunt, (b) series-series, (c) shunt-shunt, and (d) shunt-series. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 4

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**Figure 10-12 A series-shunt feedback amplifier with feedback network loading included.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 5

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Figure (a) The feedback amplifier of Figure with the two-port identified and (b) the simplified equivalent feedback amplifier. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 6

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Figure (a) The series-shunt amplifier with nonideal source and load added. (b) The amplifier after absorbing the feedback network loading into the primed network. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 7

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**Figure 10-19 Determining the input resistance with feedback of the practical series-shunt amplifier.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 8

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Figure Circuit for finding the output resistance of the series-shunt feedback amplifier of Figure 10-18(b). Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 9

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Figure (a) A series-series negative feedback amplifier and (b) the feedback network loading absorbed into the forward amplifier to form the primed network. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 10

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Figure (a) A practical shunt-shunt amplifier using two-port models. (b) The model after absorbing feedback network loading into the forward amplifier. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 11

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**Figure 10-43 (a) A shunt-series amplifier. (b) The primed network.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 12

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Figure (a) A possible transfer characteristic for the forward amplifier shown below. (b) The resulting output if the loop gain is slightly greater than one at the frequency w180, and an oscillation is started at t = 0. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 13

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Figure The Bode plot for a feedback amplifier with a(jw) given by (10.244), as shown below, and b = -50 dB. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 14

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**Figure 10-60 (a) An RC low-pass filter and (b) the step response.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 15

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Figure (a) The positions of the poles of the second-order system described by (10.251), which is shown below, as a function of z. (b) Sample step responses. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 16

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**Figure 10-73 (a) Lag-lead compensation. (b) Lead-lag compensation.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 17

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**Figure 10-74 A positive feedback loop.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 18

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**Figure 10-75 An alternate view of a positive feedback loop for an oscillator.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 19

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**Figure 10-76 A Wien-Bridge oscillator.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 20

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**Figure 10-81 A phase shift oscillator.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 21

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**Figure 10-84 A Colpitts oscillator.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 22

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**Figure 10-89 A Colpitts crystal oscillator.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 23

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**Figure 10-90 (a) The block diagram of a relaxation oscillator and (b) the resulting waveforms.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 24

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**Figure 10-91 A relaxation oscillator using RC charging.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 25

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**Figure 10-92 The block diagram of a 555 Timer IC.**

Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 26

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**Figure 10-93 The 555 Timer connected as a one shot.**

Figure The waveforms for the one shot of Figure Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 27

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**Figure 10-95 The 555 connected as an oscillator.**

Figure The waveforms for the oscillator in Figure Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc Chapter 10, slide 28

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