EECS 170C Homework #3
Prof. M. Green
due Thursday, 21 April before leture
1. A ommon-soure amplier with soure degeneration is shown in Fig. 1. For the following
questions, you an assume that ro = 1.
(a) Find the transfer funtion H (s) = Vout (s)=Vin (s).

EECS 170C Homework #1
Prof. M. Green
due Tuesday 5 April 2011, prior to leture
1. (a) In Fig. 1(a) assume that VS and RS have xed positive values. Find the value of RL, in
terms of the other iruit omponents, that gives the maximum possible power dissipati

EECS 170C Homework #5
Prof.
M. Green
due Tuesday 24 May before le ture
1.
(a) In the BJT op-amp shown in Fig.
1,
identify the non-inverting input V
and inverting
+
input V .
(b)
Find the expression for the small-signal
gain in terms of
appropriate d biasi

EECS 170C Homework #4
Prof. M. Green
due Tuesday 10 May before leture
1. In the CMOS urrent mirror shown in Fig. 1, nd d urrent IOUT . Assume all transistors
are idential, biased in saturation, and assume rout of eah transistor is very large.
2. For the B

Solution to EECS 170C Homework #1
Prof. M. Green
1. (a) The voltage across RL , found by using the voltage divider formula, is given by
VL = VS
RL
.
RL + RS
From this we can find the power dissipated in RL , given by
PL =
VL2
VS2 RL
=
.
RL
(RL + RS )2
To

EECS 170C Homework #1
Prof. M. Green
due Tuesday April 5, before beginning of lecture
1. (a) In Fig. 1(a) assume that VS and RS have fixed positive values. Find the value of
RL , in terms of the other circuit components, that gives the maximum possible po

EECS 170C Homework #2
Prof. M. Green
due Tuesday, April 12 before lecture
1. For the npn transistor shown in Fig. 1, assume f = 98/99, VBE(on) = 0.7V and VCE(sat) =
0.2V . Plot Vout , IC , IE and IC /IB as a function of IB for 0 IB 150A. You can assume
th

Solutions to EECS 170C Homework #2
Prof. M. Green
1. Before drawing the urves we must rst determine in whih region of operation the transistor
is biased for a given IB . First the easy part: If IB = 0, then we know that the transistor
must be uto (i.e., b

Solutions to EECS170C Homework #3
1. (a) The small-signal schematic of the amplifier is shown in Fig. 1. We can write the following
node equations, corresponding to KCL at vout and vs , respectively:
vout
+ gm (vin vs ) = 0
RD
vs
gm (vin vs ) +
= 0
Zs (s)

EECS 170C Homework #4
Prof. M. Green
due Tuesday April 26 before lecture
1. In the circuit shown in Fig. 1, use the following parameters: VDD = 1.8V; Vt = 0.5V;
k 0 = 150A/V2 . Assume that the transistors have identical characteristics. Neglect the ro of

EECS 170C Homework #3
Prof. M. Green
due Tuesday, April 19 before lecture
1. A common-source amplifier with source degeneration is shown in Fig. 1. For the following
questions, you can assume that ro = .
(a) Find the transfer function H(s) = Vout (s)/Vin

EECS 170C Homework #7
Prof. M. Green
due
Thursday
4 June before leture
1. (a) Estimate the bandwidth of the ommon-emitter gain stage shown in Fig. 1(a) using the
following parameters:
IC = 500A ; = 200 ; fT = 500MHz ; C = 0:3pF ; Cs = 3pF ; VA = 1
(b) Rep

EECS 170C Homework #2
Prof. M. Green
due Tuesday 12 April before leture
1. For the npn transistor shown in Fig. 1, assume f = 98=99, VBE (on) = 0:7V and VCE (sat) =
0:2V . Plot Vout , IC , IE and IC =IB as a funtion of IB for 0 IB 150A. You an assume
that

EECS 170C Homework #6
Prof. M. Green
due Thursday 2 June before leture
1. Estimate the bandwidth of the three one-transistor ampliers shown in Fig. 1. Inlude apaitors Cgs, Cgd , Csb, and Cdb . You an assume ro = 1.
2. (a) Estimate the bandwidth of the omm