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ECE137b Problem set 4
C1
R3
1 b1 s 2 b2 s 2 .
Vout ( s) / Vin ( s) c
1 a1 s 2 a 2 s 2 .
R1
R2
Vgen
Problem 1.
R1=1 KOhm, R2=2kOhm, R3=3KOhm C1= 1 fF
C2=2 fF, Find a1 and a2 (give units!).
Find, approximately, the 2 dominant pole
frequencies of the transfe
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Rgen =20 k . The parallel combination of
Rg1 and Rg 2 is 100 k . Cin and Cout are
both infinite. The load resistance is to be
twice Rd
Vdd
Rg1
Rd
Rgen
(a) Find all resistor values, the values of
C gs and C gd . Also find the transistor f (b)
Cin
Using the
.
Vcc
Problem 1. All transistors except the output
transistors have Cje=25 fF, Ccb=50 fF and
tau_f=1 ps. The push pull output transistors
have Cje=250 fF, Ccb=500 fF and tau_f=1
ps. All transistors have infinite beta, and
infinite Va, EXCEPT Q4 and Q5, gi
ECE137b problem set 5
+Vdd
Problem 1:
infinite
q3
q4
C gs r 0Wg Lg / Tox and C gd C gs / 4
infinite
q5
q9
We will assume the velocitylimited
model, and will choose all FET widths
such that  Vgs  =0.4 V.
Rgen
q2
q1
Vout
Rbias
RL
Rin
q7
q6
q8
The supplie
ECE137B Problem set #6,
Problem 1
a) The operational amplifier has infinite
input impedance, zero output impedance,
infinite commonmode rejection ratio, and
a differential gain of Adiff=100,000. Find
the gain Vout/Vin. (b) Now suppose that
the opamp has
ECE137B PS#2
L
+
Vgen
R
C
Vout

G
Cgd
Cgs
(b) R=100 Ohms. The natural resonant
frequency f n is 2 GHz and the damping
factor is 0.1. Find the values of L and
C (c) Accurately plot the Magnitude and
phase of the frequency response in Bode
Form on semilog
G
The problems below will use the
following small signal model for the
mosfet.
D
+
Cgs
Vgs
gm*Vgs
S
R
Vin
Q2
Q1
C
R
Vin
Q1
Q2
Problem 1: This is a transconductancetransimpedance amplifier. Ignore DC
Vout bias analysis. You dont need it. The two
transistor