Introduction to electronic circuit design..model

1. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Introduction
to
Electronic Circuit Design
Richard R. Spencer
Mohammed S. Ghausi

2. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
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.

3. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
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.

4. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-3 (a) The high-frequency hybrid-π model and (b) the high-
frequency T model for the generic transistor.

5. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-4 The high-frequency hybrid-π
model for a BJT.
Figure 9-5 The high-frequency T model
of a BJT with rb omitted.
Figure 9-6 The current-controlled version
of the high-frequency hybrid-π BJT model.

6. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-7 The high-frequency small-signal models for a MOSFET: (a) in the linear region, (b)
the hybrid-π model for forward-active operation (i.e., saturation), and (c) the T model for
forward-active operation.

7. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure A9-5 An ideal voltage amplifier
with a feedback impedance.
Figure A9-6 An equivalent circuit.
(A9.14)
1
f
Min
Z
Z
A
=
−
(A9.15)
1 1
f
Mout
Z
Z
A
=
−

8. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-25 A common-emitter amplifier.
(This is the same circuit as in Figure 8-33.)

9. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
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.

10. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-29 The small-signal high-frequency AC equivalent circuit for the
amplifier of Figure 9-25.

11. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-30 The equivalent circuit from Figure 9-29 after application of Miller’s
theorem.

12. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
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.

13. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-34 The circuit for finding the open-
circuit driving-point resistance seen by Cµ.

14. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-35 A common-source amplifier.

15. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-36 The small-signal low-frequency AC equivalent circuit
for the common-source amplifier of Figure 9-35.

16. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-37 Finding RSs for the circuit in Figure 9-36.

17. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-40 The equivalent circuit from Figure 9-39 after
application of Miller’s theorem.

18. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-43 The circuit for finding the open-circuit driving-point
resistance seen by Cgd.

19. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-46 (a) The small-signal high-frequency AC equivalent for the buffer in Figure 9-44.
(b) After applying Miller’s approximation.

20. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-47 Finding the open-circuit driving-point resistance seen by Ccm.
cmo x cmR R r=

21. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-59 The small-signal high-frequency AC equivalent circuit for a
common-control amplifier stage.

22. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-61 The small-signal high-frequency AC equivalent circuit for the amplifier in
Figure 9-60.
Figure 9-60 A common-base amplifier.

23. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-63 The small-signal high-frequency AC equivalent circuit for the
amplifier in Figure 9-62.
Figure 9-62 A common-gate amplifier.

24. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-64 A general bipolar single-transistor amplifier.

25. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,

26. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-65 A general FET single-transistor amplifier.

27. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,

28. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,

29. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-83 A bipolar cascode amplifier.

30. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-84 The high-frequency small-signal AC equivalent circuit of the cascode amplifier in
Figure 9-83.

31. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-86 A MOSFET cascode amplifier.

32. Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e,
Figure 9-87 The high-frequency small-signal AC equivalent circuit for the amplifier in
Figure 9-86.