〖电工电子技术〗(第三版) 高等教育出版社习题解答

9-4 电路时间常数 ??RLC?10?100?10 电源周期 T?3?6?0.1s

1?0.02s f 时间常数 ??10?()

(1) UO(AV)?1.2UO?1.2?10?12V

(2)若UO(AV)?9V 故障为滤波电容C断开。

若UO(AV)?4.5V 故障为滤波电容C断开,且有一个二极管断路。

9-5 (2) UO?T2R1?R2300?510?5??5?13.5V R1300 9-6 (2) UO?12?UZ?12?3?15V 9-7 UOmin?99?(R1?R2?RP)??900?13.5V

R1?RP60099?(R1?R2?RP)??900?27V R1300 UOmax?

输出电压调节范围 13.5?UO?27V

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习 题 十

10-1

10-2

10-3

10-4

10-5 4 7

A B C 与门 Y1 或门 Y2 A B 与非门 Y1 或非门 Y2 A B C

异或门 Y1 三态门 Y2 高阻 高阻

a)图 Y = A + B (b)图 Y=0

c)图 Y =1 (d)图 Y=AB (1)Y?ACD?ABCD?CD(A?AB)?CD(A?B)?ACD?BCD( (

(2)Y?AB?ABC?A?B?ABC?A?B?AB

(3)Y?ABC?AB?ABC?(ABC?ABC)?AB?AB?AB?B (4)Y?AB?AB?BC?BC?(AB?AB)(BC?BC)?ABC?ABC (5)Y?(A?B?C)(D?E)(A?B?C?DE) ?(ABC)(ABC?DE)(DE)?0

10-6 (1) (A?B)(C?D)(A?B)?(A?B)(A?B)(C?D) ?(AB?AB?B)(C?D)?B(C?D)?BC?BD

(2)

(AB?AB?AB)(A?B?C?ABC)?(A?B)(A?B?C?ABC)?(A?B)(A?B?C?ABC)?(A?B)(ABC?ABC)?A?B

(3) Y?AB?AC?AB?AC?AB?AC?AB(A?C)?(A?B)AC ?(AB?ABC)?(AC?ABC)?AB?AC 10-7 Y?AB?AB?AB?AB 异或

10-8 Y?(A?A?B)?(B?A?B)?[A?(A?B)]?[(B?(A?B)] ?(A?AB)(B?AB)?AB?AB 同或

10-9 A B

C

三态门输出 Y

高 阻

Y1 Y2 10-10 (1) Y?AB?ABC?AB?(ABC)?ABC

4 8

(2) Y?ABC?ABC

A B C & 1 Y 10-11 Y?AE?BE?AB

E?0 Y?AB?AB?AB?AB?A?B?AB?A?B 或逻辑 E?1 Y?AB 与逻辑

10-12 Y?ABC?ABC?ABC?ABC?AB?AC?AB?AC?AB?AC

A B C

& &

&

&

&

Y

10-13 真值表

A B C Y

0 0 0 0

0 0 1 0

0 1 0 1

0 1 1 0

1 0 0 1

1 0 1 1

1 1 0 1

1 1 1 0

逻辑函数式

Y?ABC?ABC?ABC?ABC?BC?AB?BC?AB?BC?AB 逻辑电路

A

B

&

&

&

&

Y

C

10-14 真值表(见下页) 逻辑函数式

&

Y?ABC?ABC?ABC?ABC?ABC?ABC?ABC?ABC ?ABC?ABC?ABC?ABC

4 9

A B C 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 Y 0 1 1 0 1 0 0 1 10-15 Y0?I1?I3?I5?I7

Y1?I2?I3?I6?I7 Y2?I4?I5?I6?I7 当 I4?1 时 Y0Y1Y2?001

当 I6?1 时 Y0Y1Y2?011

10-16

A1

A0

Y

D0 D1 D2 D3 D0 D1 D2 D3 D0

10-17 Si?(AiBi?AiBi)?Ci?1?(AiBi?AiBi)?Ci?1 ?(AiBi?AiBi)?Ci?1?AiBi?AiBi?Ci?1

?(AiBi?AiBi)?Ci?1?(Ai?Bi)?(Ai?Bi)?Ci?1 ?(AiBi?AiBi)?Ci?1?(AiBi?AiBi)?Ci?1

Ci?(AiBi?AiBi)?Ci?1?AiBi

?(AiBi?AiBi)?Ci?1?AiBi

5 0

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