Question

In DM, further the two integrators at encode are replaced by one integrator placed before comparator, and then such system is called?

(a) System-delta modulation

(b) Sigma-delta modulation

(c) Source-delta modulation

(d) None of the mentioned

I have been asked this question in class test.

The above asked question is from Discrete-Time Processing of Continuous Time Signals topic in division Discrete Time Systems Implementation of Digital Signal Processing

Answer 1

Correct choice is (b) Sigma-delta modulation

To explain I would say: In DM, Furthermore, the two integrators at the encoder can be replaced by a single integrator placed before the comparator. This system is known as sigma-delta modulation (SDM).