南师大中英班数字电路期末试卷(英文无答案).doc

: .
南京师范大学2008-2009学年第2学期
电气与自动化工程 学院 中英班 专业2007 年级
《电子技术 Electronics H ）》课程期终试卷 A
Name Class :
Stude nt ID : Score :
No.
1
2
3
4
5
6
7
8
9
Poi nts
1. Poi nts
Choose the correct answe(:(20 point®
(1) A qua ntity hav ing discrete离散的)values is
(a) a digital qua ntity (b) an an alog qua ntity
(c) a binary qua ntity (d) a n atural qua ntity
(2) The binary nu mber 11011101 is equal to the decimal numbe
(a) 121 (b) 221 (c) 441 (d) 256
⑶ Which of the followi ng is an in valid (无效) BCD code
(a) 0011 (b) 1001
(c) 0101 (d) 1101
(4) Simplify the expression AB C , using DeMorgan's theorems
(a) AB C (b) AB C
(c)(A B)C (d) AB C
(5) This is the tim ing diagram for a 2-i nput
gate.
⑻ OR (b) NAND
(c) NAND
(d) Exclusive-OR
(6) The in puts to a full-adder are A = 1, B = 1 and (C = 0. The outputs are
(a) Sum = 1, Cout = 1 (b) Sum = 1, Cout = 0
(c) Sum = 0, Cout = 1 (d) Sum = 0, Cout = 0
(7) The device used to convert a binary nu mber to a 7-segme nt display formatjs
(a) multiplexer (b) en coder (c) decoder (d) register
(8) A modulo-12 counter (12 进制计数器)must have
(a) 12 flip-flops (b)3 flip-flops (c) 4 flip-flops (d)s ynchronous clock ing
(9) A 4-bit binary up/dow n coun ter is in the binary state of zero. The n ext state in the DOWN mode is
(a) 000