Electronics and Communication Engineering - Digital Electronics

26. 

In TTL the transistors are driven into and out of saturation.

A. True
B. False

Answer: Option A

Explanation:

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27. 

The most commonly used logic family is

A. ECL
B. TTL
C. CMOS
D. PMOS

Answer: Option B

Explanation:

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28. 

In a JK master slave flip flop

A. master is clocked when clock is low
B. slave is clocked when clock is high
C. master is clocked when clock is high and slave is clocked when clock is low
D. master is clocked when clock is low and slave is clocked when clock is high

Answer: Option C

Explanation:

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29. 

The characteristic equation for the next state (Qn+1) of a J-K flip-flop is

A. Qn+1 = JQn + KQn
B. Qn+1 = JQn + KQn
C. Qn+1 = JQn + KQn
D. Qn+1 = JQn + KQn

Answer: Option C

Explanation:

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30. 

A semiconductor Read-only-Memory basically is

A. a combinational logic circuit
B. a set of flip-flop memory elements
C. a sequential circuit with flip-flops and gates
D. none of the above

Answer: Option A

Explanation:

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