A JK flip flop has tpd= 12 ns. The largest modulus of a ripple counter using the

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Question
A JK flip flop has t_pd= 12 ns. The largest modulus of a ripple counter using these flip flops and operating at 10 MHz is
Options
A. 16
B. 64
C. 128
D. 256

Correct Answer

256

Explanation

Number of flip-flops =

A JK flip flop has tpd= 12 ns. The largest modulus of a ripple counter using these flip flops and op

= 8.333 say 8

Modulus = 2⁸ = 256.

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2. The fixed count that should be used so that the output register will represent the input for a 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).
Options
A. 000110
B. 0010
C. 1111
D. 011101

3. An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if
Options
A. A = 1, B = 1, S = 1
B. A = 1, B = 1, S = 0
C. A = 1, B = 0, S = 1
D. A = 1, B = 0, S = 0

8. A carry look ahead adder is frequently used for addition because
Options
A. it costs less
B. it is faster
C. it is more accurate
D. is uses fewer gates

10. Minimum number of 2-input NAND gates required to implement the function F = (x + y) (Z + W) is
Options
A. 3
B. 4
C. 5
D. 6

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