GATE ECE

Digital Circuits

Analog to Digital and Digital to Analog Converters

Previous Years Questions

## Marks 1

Consider the circuit shown with an ideal OPAMP. The output voltage V0 is __________ V (rounded off to two decimal places).
...

Consider a four bit D to A converter. The analog value corresponding to digital signals of values 0000 and 0001 are 0 V and 0.0625 V respectively. The...

The number of comparators required in a 3-bit comparator type ADC is

The number of comparators in 4-bit flash ADC is

The resolution of a 4-bit counting ADC is 0.5 Volts. For an analog input of 6.6 Volts, the digital output of the ADC will be

The advantage of using a dual slope ADC in a digital voltmeter is that

For an ADC, match the following : if
List 1
A. Flash converter
B. Dual slope converter
C. Successive approximation Converter
List 2
1. require...

A 12-bit ADC is operating with a 1$$\mu $$ sec clock period and the total conversion time is seen to be 14 $$\mu $$ sec. The ADC must br of the

Match the List-1 (type of 8-bit ADC) with List-2(Minimum conversion time in clock cycles)
List - 1
A. Successive approximation
B. Dual-slope
C...

Which of the resistance networks of figure can be used as 3 bit R-2R ladder DAC. Assume $${V_0}$$ corresponds to LSB.
...

## Marks 2

In an N bit flash ADC, the analog voltage is fed simultaneously to 2N− 1 comparators. The
output of the comparators is then encoded to a binary format...

In the following circuit, the comparator output is logic “I” if V1 > V2 and is logic “0” otherwise. The D/A conversion is done as per the relation
...

In the following circuit, the comparator output is logic “I” if V1 > V2 and is logic “0” otherwise. The D/A conversion is done as per the relation
...

In the digital-to-Analog converter circuit shown in the figure below,
$${V_{R\,}}\, = \,10V$$ and $$R\, = \,10k\Omega $$
The current i is...

In the digital-to-Analog converter circuit shown in the figure below,
$${V_{R\,}}\, = \,10V$$ and $$R\, = \,10k\Omega $$
The voltage V0 is...

A 4-bit D/A converter is connected to a free-running 3-bit UP counter, as shown in the following figure. Which of the following waveforms will be obse...

The circuit shown in figure is a 4-bit DAC
The input bits 0 and 1 are represented by 0 and 5 V respectively. The OP- AMP is ideal, but all the resi...

For the 4 bit DAC shown in Figure, the output voltage $${V_0}$$ is
...