Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #10
1. Based on the concept of half-circuit, the output impedance Rout is
Rout = [1 + gm3 (r
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #9
1. The voltage at node P is
VP = VCC (I1 + I2 )R1 = VCC 2I0 R1
The peak-to-peak swing of
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #8
1. Let IB be the base current goes through the resistor RP , we have
I1
IREF I1
IB = IB
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #7
1. (a) Since Rp is in parallel connection with r1 , we have
Rout = [1 + gm1 (r1 |RP |rO2
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #6
1. (a) When Vin > VD,on /A0 0, D1 is ON and
A0 [Vin (VY VD,on )] = VY VY =
A0
A0
Vin +
VD
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #5
1. To nd the closed-loop gain, we consider the equivalent circuit shown in Figure 1(a). B
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #4
1. The input impedance Rin is given by
Rin =
1
1
1
.
50 =
gm1 =
gm1
gm1
50
The output i
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #3
1. Since ID1 is 0.5 mA, assume M1 operates in the saturation region, we have
ID1 =
1
W
1
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #2
1. (a) VGS = 1 V and VDS = VDD ID RD . We assume M1 operates in the saturation region, th
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Solution to Homework #1
1. This combination can be treated as a series connection of two resistors. The width and
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #10
1. Calculate the voltage gain of the degenerated pair depicted in Figure 1. VA < . (Hint: Av = Gm Ro
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #9
1. In the circuit of Figure 1, I1 = I0 cos wt + I0 and I2 = I0 cos wt + I0 . Plot the waveforms at X,
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #8
1. Due to a manufacturing error, resistor Rp has appeared in series with the base of QREF in Figure 1
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #7
1. Due to a unexpected manufacturing error, a parasitic resistor Rp has appeared in the cascode circu
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #6
1. Consider the precision rectier depicted in Figure 1(a), where a parasitic resistor RP has appeared
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #5
1. A noninverting amplier incorporates an op amp having an input impedance of Rin . Modeling the op
a
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #4
In the following problems, unless otherwise stated, assume n Cox = 200A/V2 , p Cox = 100A/V2 , = 0,
a
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #3
In the following problems, unless otherwise stated, assume n Cox = 200A/V2 , p Cox = 100A/V2 , = 0,
a
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #2
In the following problems, unless otherwise stated, assume n Cox = 200A/V2 , p Cox = 100A/V2 , and
VT
Department of Electrical Engineering, Tamkang University
Microelectronics, Summer 2008
Homework #1
In the following problems, unless otherwise stated, assume n Cox = 200A/V2 , p Cox = 100A/V2 , and
VT