Continuous time analogue/digital converter

摘要

Continuous time analog/digital converter, comprising a sigma delta modulator (MSD1) configured to receive an analog input signal (x(t)) and comprising high-pass filtering means (MF) the chopping frequency of which is equal to half of the sampling frequency (Fs) of the quantization means (QTZ) of the modulator (MSD1).

主权项

1. A sigma delta modulator comprising:
a first summer configured to add an analogue input signal to a feedback signal to generate a modified analogue signal; a high-pass filter configured to filter the modified analogue signal to generate a filtered modified analogue signal; and a quantizer configured to sample the filtered modified analogue signal to generate a digital signal, the high-pass filter comprising an amplifier coupled between an output of the quantizer and an input of the first summer.