高频电子线路课后习题答案(第五版)张肃文(15)

6 4解：P VCCICO 24 0.25 6 W

C

P05

83.3%P 6

22VcmVCC242

Rp 57.6

2P02P02 5

Icm1

2P02P02 5

0.417 A VcmVCC24Icm10.42

1.67Ic00.25

gc c

查表得 c 77o

2ηVCC2 0.7 12

6 6解：gc θc 1.56查表得θc 91o

Vcm10.8

P0 Ik2R 22 1 4 W

1 1

PC P P0 1P 1 4 1.7 W 0 η

0.7 c

Ic090

6 7解：icmax 282 mA o

α0900.319

Ic1mP0

α 90 i

o1

cmax

mA 0.5 282 141

11

RpIc21m 200 0.1412 2 W 22P02ηc 74%

VCCIc030 0.09

22222VcmIkmR2 0L IkmR2 0L RCIkmR2 0L RIkmR

6 8证：P0 2

2L2RP2L22 0LRC

i2.2

6 9解：Vcm VCC vcmin VCC cmax 24 21.25 V

gcr0.8

2

2

2

Ic0 icmax 0 70o 2.2 0.253 0.5566 A

Icm1 icmax 1 70o 2.2 0.436 0.9592 A P VCCIc0 24 0.5566 13.36 W 11

P0 VcmIcm1 21.25 0.9592 10.19 W

22

PC P P0 13.36 10.19 3.17 W

C

P010.19 76.3%P 13.36

2Vcm21.252

Rp 22.16

2P02 10.19