Analog To Digital & Digital To Analog Interview Question - 4

Why the delay in the flash type conversion occurs?

The delay in the flash type conversion occurs due to priority encoders and comparators in it.

What are the advantages of dual slope type A / D converter?

Advantages

Low sensitivity to noise

Variation in its component value due to change in the temperature

Analog To Digital & Digital To Analog Interview Question - 3

How the switching of the capacitor is done in the switched Capacitor type DAC?

Switched Capacitor Type DAC

The switching of the capacitor is done by two phase clock in the switched capacitor type DAC. When the phase Ø₁ is at high state, all the capacitors are switched to ground and discharged. Similarly when the phase Ø₂ is at high state, all the capacitors are switched to reference voltage.

Analog To Digital & Digital To Analog Interview Question - 2

What is resolution of the 4 – bit DAC?

% Resolution = 1 / ( 2^N – 1)

       Where N = Number of bit

Therefore, resolution of the 4 – bit DAC is

 % Resolution = 1 / ( 2⁴ – 1)

                       = 1 / 15

                       =  6.67%

Analog To Digital & Digital To Analog Interview Question - 1

What is meant by digital quantity?

Digital Quantity

It is quantity that has only discrete values. It is expressed in the digital form.

What is meant by analog quantity?

Analog Quantity

It is quantity which can take any value over a continuous range of values. E.g. temperatures, pressure, position, speed etc.