Electronics and Communication Engineering - Digital Electronics

31. 

A DAC has full scale output of 5 V. If accuracy is ± 0.2% the maximum error for an output of 1 V is

A. 5 mV
B. 10 mV
C. 2 mV
D. 20 mV

Answer: Option B

Explanation:

Maximum error = = 10 mV.


32. 

Binary number 1101101101 is equal to decimal number

A. 3289
B. 2289
C. 1289
D. 289

Answer: Option A

Explanation:

2048 + 1024 + 128 + 64 + 16 + 8 + 1 = 3289 in decimal.


33. 

A 16:1 multiplexer has 4 select input lines.

A. True
B. False

Answer: Option A

Explanation:

24 = 16.


34. 

Which one of the following can be used as parallel to series converter?

A. Decoder
B. Digital counter
C. Multiplexer
D. Demultiplexer

Answer: Option C

Explanation:

It converts parallel data into serial data.


35. 

What will be conversion time of a successive approximation A/D converter which uses 2 MHz clock and 5 bit binary ladder containing 8 V reference.?

A. 2.5 μ sec
B. 25 μ sec
C. 3 μ sec
D. 4 μ sec

Answer: Option A

Explanation:

.