Solution
EE11 HOMEWORK 3
Due Oct.5, 09
The circuit of Fig.1 is referred to as an Instrumentation
Amplifier. Find the voltage [Vo1Vo2] in terms of Vs1
and Vs2. Use PSPICE to check your design. Set Vs1 to 0.5V and
Vs2 to 1V in your simulation with Ro=20K,
Solutions
EE11 HOMEWORK 4
+12V
0V
2

V
+2
V
Vs
Create a schematic for a Schmitt trigger circuit with the
transfer function of Fig.2. The saturation limits of the opamp are 12V, the trip points are 2V and the feedback
resistor is to be 20K.
R1
(122)/20K
Solutions
EE11 HOMEWORK 7
2K
Vs
The current in the diode of Fig.2 is governed by the equation
ID = 2E10 exp(VD/46mv)
Find VD if Vs = 5V
Find VD if Vs = 5V + 0.1Cos(100t)
VD
VD = 46mv ln(ID/2E10)
ID = (5VD)/2K
FIG 2
VD = 0.6
VD = 0.746
VD = 0.744
VD = 0
Solution
EE11 HOMEWORK 7
2.4K
2.4K
Vs
Vo
D1
V
2K
5
V1
3K
FIG 1
Due Nov.02, 09
Assume the diode of Fig.1 drops a
constant voltage of 0.6V when it
conducts.
Vs
Vo
D1
V1
(2K3K)
Find Vo when Vs = 1.5V
Find Vo when Vs = 6V
1.2K
3V
When D1 does not conduct, V1
NAME
EE11 HOMEWORK 8
Ic
Due Nov.09, 09
Vc
N1:N2
R1
I3
Vo
120 rms
60Hz
C
+
Vz
Iz
R2
5.1K
I2
I1
IL
FIG 1
In the circuit of Fig.1,
The regulator diode voltage is 5.1V.
The regulator diode current Iz must always exceed 10ma.
The regulator diode dynamic resist
NAME
EE11 HOMEWORK 11
Due Nov. 16, 09
Vc
N1:N2
R1
VB
120 rms
60Hz
C
+
5V
10K
IE
Vo
5K
FIG 1
In the power supply of the figure the average current in the regulator diode is 10 ma.
Find Vo and R1. The current iE changes from 5ma to 50ma. Recognizing that
NAME
EE11 HOMEWORK 9
With the switch of Fig.1 open, the amplifier of
the figure is to be biased for optimal sinusoidal
operation. It is to have a gain of 4, an input
impedance of 30K for frequencies at which
1/C1< 30K and an output impedance of 10K
for f
Solution
EE11 HOMEWORK 6
Due Oct 21, 09
0.01uf
Determine the transfer function for the circuit of
Fig.2.
Determine the filter DC gain.
Determine the filter gain as
Find the filter transfer function
10K
Vs
Vo
100K
90K
H(0) = 1
FIG 2
H(j ) = 0.1
H(s) = 
Solutions
EE11 HOMEWORK 10
Due Dec. 07 , 09
Vcc
The logic arrangement of Fig.1 consists of Pchannel
and Nchannel enhancementmode transistors.
Find Vo for the various conditions of the pins A, B,
and C.
A
B
C
Vo
A
B
C
Vo
0
0
0
A
Vcc
B
Vcc
0
0
Vcc
Vcc
0
Solution
EE11
QUIZ 1
SEPT 21, 09
The circuit of Fig 2 is the Thevenin equivalent of the circuit in Fig.1 at the terminals A,B.
Find Ro and Vo.
10K
Ro
A
A
Ro = 10K5K = 3.33K
Vo
12V
5K
Vo = (1/3)12 = 4V
B
B
FIG1
FIG2
R1
Vs
Zin
Choose R1 and Ro in the circu
Solution
QUIZ 2
EE11
Sept.28, 09
Find V1 in the circuit of Fig.1.
10K
V1
10K
20K
+
+
4V
V1 = 4V(20K/40K) + 2V(20K/40K) = 3V
2V
FIG 1
Choose R1 and Ro in the circuit of Fig.2
so that Zin=10K and Vo = 3Vs
R1 = 10K
R1
Vs
Zin
Vo =  (2 + 10K/R3) =  50
Vo
FI
Solution
QUIZ 4
EE11
Oct.13, 09
R1
Choose the resistor R1 in the circuit of Fig.2 so that the
Schmitt trigger has the trip points 3V.
13/12k = 3/R1
12K
Vo
13V
I
R1 = (3/13)12K
Vs 3V
R1 = 2.77K
FIG 3
Choose the resistor R1 in the circuit of Fig.3 so that t
NAME
QUIZ 5
EE11
Nov.02, 09
Given that the diode in the circuit of Fig.1 satisfies
ID1 = 3E11exp(VD1/46mv), determine the diode current.
V
2K
10
VD
VD1 = 46mv[ln(ID1/3E11)]
ID1 = (10VD1)/2K
FIG 1
I(0)= [100.6]/2K = 4.7ma
V(1) = 46mv[18.86] =868mv
I(1)
Name
EEll HOMEWORI( 5 Sec.A
Due Oct.9, 06 t0K
Assumethe circuit of Fis.1 is stableand find the currentIs when Vs:lv. Using this result find the circuit input Vs impedance
Is:
(Vs/Is) :
Checkyour answerusing PSPICE. Find Vo1 and Vo2 in the circu
Name
EEll HOMEWORK2
Sec.A
Due Sept.l8, 06
ChooseR1 and Rz in the circuit of Fis.2 so that Vab : 12v and Zab : 2 0 K 20v
Rr: Rz: the in so Choose resistors frg.2 thatVo:3Vr  Vz.
FIG 1
Rt: R2 FIG 2
Ro, connected a sourceVs. The circuit of Fig.
Solution
EE11 HOMEWORK 1
Due Sept. 21,09
Fig.2 shows the thevenin equivalent of the circuit in Fig.1.
Find Rs and Vs in Fig.2.
1K
A
10V
Vs=V1 = (1/2)10V = 5V
1K
With the source set to zero,
A
Vs
Choose R1 and Ro in the circuit of Fig.3 so that
Vo/Vs = 3