Exercise: Digital Electronics

Questions for: Digital Electronics

A 12 bit ADC is used to convert analog voltage of 0 to 10 V into digital. The resolution is
A:
2.44 mV
B:
24.4 mV
C:
1.2 V
D:
none of the above
Answer: A

.

📖
📝
💬
👁️
In a ripple counter,
A:
whenever a flip flop sets to 1, the next higher FF toggles
B:
whenever a flip flop sets to 0, the next higher FF remains unchanged
C:
whenever a flip flop sets to 1, the next higher FF faces race condition
D:
whenever a flip flop sets to 0, the next higher FF faces race condition
Answer: A

In a ripple counter the effect ripples through the counter.

📖
📝
💬
👁️
The basic storage element in a digital system is
A:
flip flop
B:
counter
C:
multiplexer
D:
encoder
Answer: A

Storing can be done only in memory and flip-flop is a memory element.

📖
📝
💬
👁️
A JK flip flop has tpd= 12 ns. The largest modulus of a ripple counter using these flip flops and operating at 10 MHz is
A:
16
B:
64
C:
128
D:
256
Answer: D

Number of flip-flops = = 8.333 say 8

Modulus = 28 = 256.

📖
📝
💬
👁️
The greatest negative number which can be stored is 8 bit computer using 2's complement arithmetic is
A:
- 256
B:
- 128
C:
- 255
D:
- 127
Answer: B

The largest negative number is 1000 0000 = -128.

📖
📝
💬
👁️
Ad Slot (Above Pagination)
Quiz