Explain the following: a) Elaborate why the method of inverted R-2R ladder is preferred in DAC as compared to other two techniques. b) Explain the benefits of successive approximation register over...

Explain the following:
a) Elaborate why the method of inverted R-2R ladder is
preferred in DAC as compared to other two techniques.
b) Explain the benefits of successive approximation register over
counter ramp technique. Give reasons in your answer.
c) Draw a comparison chart between each scheme of ADC
characteristics.