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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
4 6
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