Question

What is the role of logic control and sequencer in a successive approximation type DVM?

(a) generate analog voltage

(b) generate power

(c) generate current through resistance

(d) generate sequence code

I got this question in final exam.

My doubt is from Successive Approximation Type DVM in portion Electronic Instruments of Electrical Measurements

Answer 1

Right answer is (d) generate sequence code

Easiest explanation: A comparator is used in a successive approximation type DVM so as to compare the output of the D/A converter with the unknown voltage. Logic control and sequencer takes the input from the comparator and generates the sequence code.