Which of the following describes a "delta-sigma modulator"?

A) A type of linear ADC

B) A type of quantization technique

C) A method for oversampling and noise shaping

D) A digital filter design technique

Answer: C) A method for oversampling and noise shaping

Explanation: A delta-sigma modulator is used in ADCs for oversampling the input signal and applying noise shaping techniques to improve resolution and reduce quantization noise, making it highly effective for high-precision applications.

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