高频电子线路课后习题答案(第五版)张肃文(12)

1 gm 5 23解：

diC23

b1 2b2vBE 3b3vBE 4b4vBE

dvBE

diCdvBE

b1 2b2V0mcos 0t 3b3V02mcos2 0t 4b4V03mcos3 0t

vBE v0

gm t

b1 2b2V0mcos 0t gm1 2b2V0m 3b4V03m

3

b3V02m 1 cos2 0 2b4V03mcos 0t b4V03m cos 0t cos3 0t 2

1

gm1 b2V0m 1.5b4V03m2

qvBEdiCaISq

2 gm vBE ekT

dvBEkTgc digm t C

dvBE

omcos 0taIq

SVomcos 0t ekT

kT

q

vBE v0

23

aISqq1 q1 q

Vomcos 0t 1 Vomcos 0t Vomcos 0t Vomcos 0t kT2 kT6 kT kT

qV I qV I qV qV

ISomcos 0t IS om cos2 0t S om cos3 0t S om cos4 0t

kT2 kT 6 kT kT gm1

qV3 IS qVom ISom

kT8 kT

3

234

IqV3 IS1

gc gm1 Som

22kT16

5 25解：i i1 i3 i2 i4

qVom kT

2

3

a0 a1 v0 vs a2 v0 vs a3 v0 vs a4 v0 vs

3

4

a0 a1 v0 vs a2 v0 vs a3 v0 vs a4 v0 vs

2

3

4

a0 a1 v0 vs a2 v0 vs a3 v0 vs a4 v0 vs

2

3

4

a0 a1 v0 vs a2 v0 vs a3 v0 vs a4 v0 vs

2

3

4

3

8a2v0vs 16a4v0vs 16a4vs3v0