# MCQs on Analog to Digital Converters

1 - Question

What is the nyquist frequency for a bandwidth of span “X”?
a) 0
b) X
c) 2X
d) 3X
Explanation: The nyquist frequency for a bandwidth of span “X” is 2X. The nyquist frequency of any signal that is band limited is defined as twice the bandwidth of the channel. So for a bandwidth span of “X”, the nyquist frequency will be 2X.

2 - Question

What is the LSB voltage of a analog to digital converter if the full scale voltage range is 16 volt and the resolution of analog to digital converter in bits is 2?
a) 6 volt
b) 1 volt
c) 4 volt
d) 2 volt
Explanation: Given: Full scale voltage range=16 volt Resolution of analog to digital converter=2 bits Number of intervals=2(resolution of analog to digital converter in bits) Number of intervals => 22=4 Resolution=Full scale voltage range/ number of intervals LSB voltage=resolution LSB voltage=>16/4=4 volts.

3 - Question

What is the full scale voltage range of a analog to digital converter if the LSB voltage is 4 volt and the resolution of analog to digital converter in bits 3?
a) 36 volt
b) 31 volt
c) 43 volt
d) 32 volt
Explanation: Given: LSB voltage = 4 volt Resolution of analog to digital converter=3 bits Number of intervals=2(resolution of analog to digital converter in bits) Number of intervals => 23=8 Resolution=Full scale voltage range/number of intervals LSB voltage=resolution Full scale voltage range=Resolution*number of intervals Full scale voltage range=4*8 Full scale voltage range=32 V

4 - Question

What is the resolution of a analog to digital converter if the full scale voltage range is 16 volt and the resolution of analog to digital converter in bits 2?
a) 6 volt
b) 1 volt
c) 4 volt
d) 2 volt
Explanation: Given: Full scale voltage range=16 volt Resolution of analog to digital converter=2 bits Number of intervals=2(resolution of analog to digital converter in bits) Number of intervals => 22=4 Resolution=Full scale voltage range/number of intervals Resolution=>16/4=4 volts. advertisement

5 - Question

Nyquist rate is the maximum rate at which a signal of finite bandwidth needs to be sampled in order to retrieve all its information.
a) True
b) False
Explanation: Nyquist rate is the not maximum rate at which a signal of finite bandwidth needs to be sampled in order to retrieve all its information. It is the minimum rate at which the signal of finite bandwidth needs to be sampled to get all its information.

6 - Question

What is the LSB voltage of a analog to digital converter if the full scale voltage range is 8 volt and the resolution of analog to digital converter in bits 2?
a) 6 volt
b) 1 volt
c) 4 volt
d) 2 volt
Explanation: Given: Full scale voltage range=8 volt Resolution of analog to digital converter=2 bits Number of intervals=2(resolution of analog to digital converter in bits) Number of intervals => 22=4 Resolution=Full scale voltage range/ number of intervals LSB voltage=resolution LSB voltage=>8/4=2 volts.

7 - Question

How many resistors are required to make an n-bit Analog-to-digital converter using string resistor ladder network?
a) 2n resistors
b) 2n resistors
c) 3n resistors
d) 3n resistors
Explanation: 2n resistors are required to make an n-bit Analog-to-digital converter using string resistor ladder network. The number of resistors increases exponentially, which is a major disadvantage of this network.

8 - Question

Which of the integrated circuit mentioned below is the name of an Analog to digital converter?
a) BC541
c) TIP122
d) TIP135
Explanation: ADS1115 the name of an Analog to digital converter. It is a 16 bit integrated circuit and is designed by the Texas Instrument. It supports I2C communication protocol. It also has an oscillator inside it.

9 - Question

What does LVDS stand for?
a) Low-voltage differentiating signal
b) Least-voltage differential signal
c) Low-voltage differential signal
d) Low-voltage differentiable signal
Explanation: LVDS stand for Low-voltage differential signal. It is a technical standard which specifies the electrical characteristics of a serial, differential communication protocol. It is also known an TIA/EIA-644.

10 - Question

What is the resolution of a analog to digital converter if the full scale voltage range is 8 volt and the resolution of an analog to digital converter in bits 2?
a) 6 volt
b) 1 volt
c) 4 volt
d) 2 volt
Explanation: Given: Full scale voltage range=8 volt Resolution of analog to digital converter=2 bits Number of intervals=2(resolution of analog to digital converter in bits) Number of intervals => 22=4 Resolution=Full scale voltage range/ number of intervals Resolution=>8/4=2 volts.

11 - Question

What is binary equivalent of 30?
a) 11110
b) 01111
c) 11011
d) 111110
Explanation: The binary equivalent of 30 is 11110. Binary number system is the smallest possible number system that contains only 0 and 1. It is machine level language. Machines are fed with binary information for performing any work.

12 - Question

What is binary equivalent of 70?
a) 1000101
b) 1000111
c) 1000110
d) 111110
Explanation: The binary equivalent of 70 is 1000110. Binary number system is the smallest possible number system that contains only 0 and 1. It is machine level language. Machines convert our high level language to their binary equivalent for understanding the commands.

13 - Question

What is the resolution of a analog to digital converter if the full scale voltage range is 10 volt and the resolution of analog to digital converter in bits 2?
a) 1.5 volt
b) 2.5 volt
c) 4 volt
d) 2 volt
Explanation: Given: Full scale voltage range=10 volt Resolution of analog to digital converter=2 bits Number of intervals=2(resolution of analog to digital converter in bits) Number of intervals => 22=4 Resolution=Full scale voltage range/number of intervals Resolution=>10/4=2.5 volts.

14 - Question

What is gray code equivalent of 51?
a) 1000101010
b) 0000101010
c) 00001010101
d) 0000101011
Explanation: The gray code equivalent of 51 is 0000101010. Gray code was developed to encrypt the digital data. It converted the binary into similar looking pattern of 0’s and 1’s which can only be decoded if the correct algorithm is followed.

15 - Question

What is gray code equivalent of 7?
a) 0111
b) 0110
c) 01001
d) 0100