Sigma-delta modulators with high speed feed-forward architecture

摘要

A sigma-delta modulator is provided for generating a digital output signal. The sigma-delta modulator is used to generate a digital output signal. The sigma-delta modulator includes a multi-stage loop filter and a quantizer. The multi-stage loop filter receives an analog input signal and generates an integrated output signal according to the analog input signal. The quantizer is coupled to the multi-stage loop filter. The quantizer receives the integrated output signal and quantizes the integrated output signal to generate the digital output signal. Different feed-forward paths of the sigma-delta modulator are available for different frequency bands.

主权项

1. A sigma-delta modulator for generating a digital output signal, comprising:
a multi-stage loop filter receiving an analog input signal and generating an integrated output signal according to the analog input signal; and a quantizer, coupled to the multi-stage loop filter, receiving the integrated output signal and quantizing the integrated output signal to generate the digital output signal; wherein different feed-forward paths of the sigma-delta modulator are available for different frequency bands.