Download Introduction to Electronic Circuit Design

Introduction
to
Electronic Circuit Design
Richard R. Spencer
Mohammed S. Ghausi
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 1
Figure 9-1 One possible model for (a) a real resistor, (b) a real inductor, and
(c) a real capacitor. The elements used in the models are ideal resistance,
capacitance, and inductance. Rs is the series parasitic resistance (caused by
the leads), Rp is the parallel parasitic resistance, and Ls and Cp are the
parasitic series inductance and parallel capacitance, respectively.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 2
Figure 9-2 A small-signal model for a diode that
is valid for high frequencies. rd is present only
in forward bias. The value of C depends on the
type of diode and whether it is forward or
reverse biased; see text for details.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 3
Figure 9-3 (a) The high-frequency hybrid-p model and (b) the highfrequency T model for the generic transistor.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 4
Figure 9-4 The high-frequency hybrid-p
model for a BJT.
Figure 9-6 The current-controlled version
of the high-frequency hybrid-p BJT model.
Figure 9-5 The high-frequency T model
of a BJT with rb omitted.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 5
Figure 9-7 The high-frequency small-signal models for a MOSFET: (a) in the linear region, (b)
the hybrid-p model for forward-active operation (i.e., saturation), and (c) the T model for
forward-active operation.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 6
Figure A9-5 An ideal voltage amplifier
with a feedback impedance.
Z Min 
Z Mout 
Zf
1 A
Zf
11 A
(A9.14)
(A9.15)
Figure A9-6 An equivalent circuit.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 7
Figure 9-25 A common-emitter amplifier.
(This is the same circuit as in Figure 8-33.)
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 8
Figure 9-26 The small-signal low-frequency AC equivalent circuit for the
common-emitter amplifier of Figure 9-25.
Figure 9-27 The circuit of Figure 9-26 with the emitter impedance reflected
into the base.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 9
Figure 9-29 The small-signal high-frequency AC equivalent circuit for the
amplifier of Figure 9-25.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 10
Figure 9-30 The equivalent circuit from Figure 9-29 after application of Miller’s
theorem.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 11
Figure 9-32 (a) The small-signal low-frequency AC equivalent for the common-emitter
amplifier of Figure 9-25 and (b) the circuit for finding the short-circuit driving-point
resistance seen by CE.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 12
Figure 9-34 The circuit for finding the opencircuit driving-point resistance seen by Cm.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 13
Figure 9-35 A common-source amplifier.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 14
Figure 9-36 The small-signal low-frequency AC equivalent circuit
for the common-source amplifier of Figure 9-35.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 15
Figure 9-37 Finding RSs for the circuit in Figure 9-36.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 16
Figure 9-40 The equivalent circuit from Figure 9-39 after
application of Miller’s theorem.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 17
Figure 9-43 The circuit for finding the open-circuit driving-point
resistance seen by Cgd.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 18
Figure 9-46 (a) The small-signal high-frequency AC equivalent for the buffer in Figure 9-44.
(b) After applying Miller’s approximation.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 19
Rcmo  Rx rcm
Figure 9-47 Finding the open-circuit driving-point resistance seen by Ccm.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 20
Figure 9-59 The small-signal high-frequency AC equivalent circuit for a
common-control amplifier stage.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 21
Figure 9-60 A common-base amplifier.
Figure 9-61 The small-signal high-frequency AC equivalent circuit for the amplifier in
Figure 9-60.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 22
Figure 9-62 A common-gate amplifier.
Figure 9-63 The small-signal high-frequency AC equivalent circuit for the
amplifier in Figure 9-62.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 23
Figure 9-64 A general bipolar single-transistor amplifier.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 24
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 25
Figure 9-65 A general FET single-transistor amplifier.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 26
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 27
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 28
Figure 9-83 A bipolar cascode amplifier.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 29
Figure 9-84 The high-frequency small-signal AC equivalent circuit of the cascode amplifier in
Figure 9-83.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 30
Figure 9-86 A MOSFET cascode amplifier.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 31
Figure 9-87 The high-frequency small-signal AC equivalent circuit for the amplifier in
Figure 9-86.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc.
Chapter 9, slide 32