Electronics and Communication Engineering - Digital Electronics

41. 

In a 4 bit counter the output of 3 JK FFs from MSB downward are connected to the NAND gate whose O/P is connected to CLR

A. it is a MOD-14 counter
B. it is MOD-13 counter
C. it is divided by 13 counter
D. it is divide by 10 counter

Answer: Option A

Explanation:

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42. 

For checking the parity of a digital word, it is preferable to use

A. AND gates
B. NAND gates
C. EX-OR gates
D. NOR gates

Answer: Option C

Explanation:

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43. 

Among the digital IC families - ECL, TTL, and CMOS

A. ECL has the least propagation delay
B. TTL has largest fan out
C. CMOS has the lowest noise margin
D. TTL has the lowest power consumption

Answer: Option A

Explanation:

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44. 

In ASCII, letter B is coded as

A. 1000001
B. 1000010
C. 100100
D. 1001000

Answer: Option B

Explanation:

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45. 

The power dissipated per gate

A. is constant at all frequencies
B. increases with frequency
C. decreases with frequency
D. may increase or decrease with frequency

Answer: Option B

Explanation:

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