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第九章习题解答

第九章习题解答. 波形发生器. 习题 9.2.1 p429. (a): 不能,因为是反相放大器 (b): 能. 习题 9.2.2. (1) :能。 (2) : R f ≧2R e1 , f=1/2 RC=58.5Hz (3): R e1 正温度系数, R f 负温度系数. 习题 9.2.3. (a) :能 (b) :不能. 习题 9.2.4. R 2 断开,则输出变成方波,输出电压  10V ,峰--峰值 20V. 习题 9.2.5. R 1 =2K , R f =2R 1 =R P +r d //4.5K

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第九章习题解答

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  1. 第九章习题解答 波形发生器

  2. 习题9.2.1 p429 (a): 不能,因为是反相放大器 (b): 能

  3. 习题9.2.2 (1):能。 (2):Rf≧2Re1, f=1/2RC=58.5Hz (3): Re1正温度系数,Rf负温度系数

  4. 习题9.2.3 (a):能 (b):不能

  5. 习题9.2.4 R2断开,则输出变成方波,输出电压10V,峰--峰值20V

  6. 习题9.2.5 R1=2K , Rf=2R1=RP+rd//4.5K ∴ RP=4K-0.5K//4.5K=3.55K

  7. 习题9.3.1 (a):不能,负反馈 (b):能,正反馈,共基极 (c):不能,负反馈,共基极 (d):能,正反馈。

  8. 习题9.3.2 (a):不能 (b):能,电容三点式 (c):不能

  9. 习题9.3.3 (1): (2): (3):这种电路的主要作用是减小三极管结电容对频率的影响

  10. 习题9.3.4 (a):电感三点式 (b):电容三点式 只有在石英晶体的串联谐振频 fs 率才能满足振荡条件。

  11. 习题9.3.5 • 在串联谐振频率下振荡,因为只有在此频率晶体才能等效于电阻。 • 采用结型场效应管的可控电阻Rds实现稳幅

  12. 习题9.3.6 反馈线路中应串入一个电容

  13. 习题9.4.3

  14. 习题9.4.5

  15. 习题9.4.6

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