1
GATE ECE 1998
MCQ (Single Correct Answer)
+2
-0.6
In figure, A = 1 and B = 1. The input B is now replaced by a sequence 101010 ___, the outputs x and y will be GATE ECE 1998 Digital Circuits - Sequential Circuits Question 38 English
A
fixed at 0 and 1, respectively
B
x = 1010 ------while y = 0101 ------
C
x = 1010 ----and y = 1010 ----
D
fixed at 1 and 0, respectively
2
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The noise margin of a TTL gate is about
A
0.2V
B
0.4V
C
0.6V
D
0.8V
3
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The advantage of using a dual slope ADC in a digital voltmeter is that
A
its conversion time is small
B
its accuracy is high
C
it gives output in BCD format
D
it does not require a comparator.
4
GATE ECE 1998
Subjective
+5
-0
The mod-5 counter shown in figure counts through states Q2 Q1 Q0 = 000, 001, 010, 011 and 100. GATE ECE 1998 Digital Circuits - Sequential Circuits Question 23 English

(a) Will the counter lockout if it happens to be in any one of the unused states?

(b) Find the maximum rate at which the counter will operate satisfactorily. Assume the propagation delays of flip-flop and AND gate to be tF and tA