# MICROELECTRONIC CIRCUIT DESIGN

## RICHARD C. JAEGER

### Corrections to Answers - Updated 9/5/03

Note: The second and subsequent printings incorporated many of these corrections.

Chapter 1

• 1.23 1.07 x 10-3vs -> 1.07 x 10-3vs
• 1.28 2 x 105; 36o
Chapter 2
• 2.7 -2.13 x 106 cm/s
• 2.35 Both answers should be positive
Chapter 3
• 3.35 SPICE: (431 uA, 0.693 V)
• 3.44 (a) V = -5 V (b) V= -4.3 V
• 3.69 16.8 -> 17.8 V; 210 -> 420 A
• 3.73 4000 -> 2000 V
• 3.103 8.6ns -> 5.6 nS
Chapter 4
• 4.75 (36.3 uA, 12.9 mV); (31.7 uA, 1.54 V); (28.2 uA, 2.69 V)
• 4.81 (500 uA, 5.00 V); (79.9 uA, 0.250 V); (159 uA, 3.70 V)
• 4.84 0.5 mA, 0, 1.17 V; 1.38 mA, 0.62 mA, -0.7 V
• 4.86 (76.4 uA, 9.21 V), (76.4 uA, 5.03 V); 5.18 V
Chapter 5
• 5.21 0.282 um
• 5.23 16.3 pA, 17.1 pA, 0.857 pA
• 5.37 0.730 -> 0.723 V
• 5.41 100 uA, 4.52 uA, 95.5 uA, 0.589 V, 0.593 V; 2.19 mA, 0.100 mA, 2.09 mA, 0.666 V, 0.666 V
• 5.43 82.5 uA -> 80.9 uA
• 5.61 (5.0 mA, 1.3 V)
• 5.71 3.79 -> 3.73 V
Chapter 6
• 6.27 The answer given is for Problem 6.26.
• 6.33 16.2
Chapter 7
• 7.7 40.3 kohms, 4.90/1; 1.47 V, 0.653 V
• 7.13 1.07 -> 0.610 V
• 7.25 4.90/1, 1/1.41, 0.777 V, 1.36 V
• 7.31 0.334 -> 0.163 V
• 7.57 50.0 ns -> 4.44 ns
• 7.63 2.63/1, 25.3/1, 13.6 ns, 2.07 ns
Chapter 8
• 8.1 108 uA/V2; 43.2 uA/V2
• 8.17 0.75 ns, 0.90 ns, 0.40 ns, 0.35 ns, <C> = 120 fF
• 8.30 8.13 ns, 16.3 ns, 16.3 ns
Chapter 9
• 9.21 361 uA, 1.85 W
• 9.23 0.266 V
• 9.31 11304; 11304
• 9.37 There are only six output words. W3 = 001010112
• 9.50 The problem should refer to Fig. 9.56.
Chapter 10
• 10.21 50.0 uA, -2.30 V
• 10.35 -0.892 V; -1.14V
• 10.39 -0.968 -> -0.974 V
• 10.47 18.2 mW -> 5.67 mW
• 10.53 2.23 kohms, 4.84 kohms, 60.1 kohms
• 10.57 160; 0.976; 5; 0.773 V
• 10.59 0.691 V; 0.710 V
• 10.61 26 -> 33
• 10.63 0.677 V -> 0.682 V
• 10.77 8
• 10.79 234 mA, 34.9 mA
• 10.83 (b) All 0 except IB1 = IE1 = 203 uA
• 10.89 2 -> 13
• 10.105 0 V, -0.80 V, -0.40 V
Chapter 12
• 12.1 79.9 dB --> 59.9 dB
• 12.35 401 Mohms -> 785 Mohms
• 12.93 12.9 kHz -> 20.0 kHz
• 12.99 -1; -1
• 12.113 (0, T/2): 0 V, (T/2, 3T/2): 1 V, (3T/2, 5T/2): 4 V, (5T/2, 7T/2): 8 V, (7T/2, 9T/2): 12 V, (9T/2, 5T): 15 V
• 12.121 2.40 Hz
• 12.131 0 Hz
Chapter 13
• 13.1 1.03 sin 2000(pi)t; 5 - 1.03 sin 2000(pi)t
• 13.23 (338 uA, 5.40 V)
• 13.106 1 Mohm, 0, -7.45 Mohms, 3.53 kohms
• 13.119 -60.7, 630 ohms, 960 ohms
Chapter 14
• 14.13 -14.7, -11.6, ...
• 14.19 0.999 -> 0.909
• 14.21 0.982, 1.29, 31.6 kohms, 9.19 ohms, 2.83 V
• 14.23 0.956, 9.56, 1.00 Mohms, 555 ohms, 6.28 V
• 14.31 5.51, 0.178, ...
• 14.37 44.5 ohms
• 14.47 ... C-B or C-G ...
• 14.53 -uf vs, R5 + ro(1+gmR5) approximately equal to ro(1+gmR5)
• 14.55 vs, (Rth + rpi)/(Bo+1)
• 14.56 (d) -(gm+go)
• 14.58 0.565 V -> 0.703 V
• 14.64 SPICE: (268 uA, 8.60 V), 4.26, 1.27 kohms, 18.8 kohms
• 14.75 Avmax = 54.8, Avmin = 44.8
Chapter 15
• 15.14 84.9 dB -> 86.1 dB
• 15.17 -31.6 -> -63.2
• 15.29 (8.52 uA, 1.42 V), (8.40 uA, 0.940 V), -48.1
• 15.34 (a) (8.43 uA, 1.36 V) (b) 100 kohms -> 50 kohms
• 15.37 (198 uA, 4.98 V); -312 -> -309; 40.4 -> 20.2 Mohms; 39.0 -> 19.5 kohms
• 15.41 VO = 1.09 V, vo = 0; VO = 1.09 V, vo = 219 mV; 5.00 mV
• 15.47 -16.1 V, -13.1 V, -3.00 V
• 15.55 (91.3 uA, 12.9 V); Add = -16.7, Acc = -0.486, single-ended CMRR = 24.7 dB
• 15.65 (20.0 uA, 6.67 V)
• 15.66 Use VDD = VSS = 12V: -3.08 V, -1.22 V, 62.1 mV
• 15.71 Use RC = 75 kohms
• 15.72 A wire should connect the source of M1 to the source of M2.
• 15.73 1040 -> 893, v1 -> v2
• 15.75 (c) 49.0 kohms (d) 34.6 Mohms
• 15.79 93000 -> 27800
• 15.85 3520 -> 4230, 74.1 -> 97.5 kohms
• 15.91 2.59 V -> 2.89 V, Adm = 529, 412 ohms-> 341 ohms
• 15.93 (99.0 uA, 5.00 V), 5700 -> 11400
• 15.95 182 -> 249
• 15.101 86.0 dB -> 88.5 dB, 27.4 ohms -> 18.1 ohms
• 15.126 97.6 Mohms -> 101 Mohms
• 15.129 16.9 uA, 168 Mohms, 5.11 uA, 555 Mohms, 16.9 uA, 168 Mohms
• 15.131 44.1 uA, 22.1 Mohms, 10.0 uA, 210 Mohms
• 15.133 600 Gohms -> 657 Gohms
• 15.136 7.16 V -> 7.62 V
• 15.139 1.27 V -> 3.16 V
Chapter 16
• 16.1 4.37 kohms -> 4.31 kohms
• 16.11 994 uA -> 944 uA
• 16.14 125 uA, 690 uA, 1.31 mA, 600 kohms, 100 kohms, 66.4 kohms
• 16.27 -VEE + 1.16 V for VCB3 > 0
• 16.30 -VEE + 1.91 = -8.09 V
• 16.49 30.7 uA, 15.3 uA
• 16.51 462 uA, 308 uA
• 16.53 79.1, 6.28 x 10-5, 122 dB
• 16.57 300 -> 323, 142 -> 152
• 16.58 21400 -> 19600
• 16.75 Adm = 3.03 x 105
• 16.79 805 -> 255 ohms
• 16.86 757 kohms -> 752 kohms
• 16.89 -1.668 V -> -1.688 V
Chapter 17
• 17.11 19.3 dB, 151 Hz; 35.0 dB, 12.6 Hz
• 17.20 fL = 13.1 Hz for C1 = infinity, limited by C3
• 17.39 (2750-j4.99) ohms, (2730-j226) ohms, (836-j1040) ohms
• 17.41 Use VCC = 12 V; -9.44, 43.9 Hz, 9.02 MHz; 85.1 MHz
• 17.69 10.6 MHz, 33.3 V/ms
• 17.75 22.5 MHz, 2.91, -41.1
• 17.79 13.4 MHz, 7.98, 112/_-90o; 4.74 MHz, 5.21, 46.1/_-90o
• 17.84 10.9 MHz, 16.4, -75.1; 10.1 MHz, 3.96, -35.4
Chapter 18
• 18.11 0.999, 43.9 Mohms, 2.49 ohms, 98.9 mS
• 18.16 82.2 ohms; 46.2 ohms; -32.4 kohms, -32.4
• 18.22 & 18.23 The answers to these problems are interchanged.
• 18.30 46.1 kHz, 9.31 Hz; 81.0 kHz, 5.29 Hz
• 18.70 0.833 -> 1.20

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