Analogue to digital converter

摘要

An analog to digital converter comprises an input terminal configured to receive an analog input signal and an output terminal configured to provide an output digital signal. The analog to digital converter also comprises a main summer having a summing input, a subtracting input and a summing output, wherein the summing input is connected to the input terminal; an analog filter having a filter input and a filter output, wherein the filter input is connected to the summing output; a quantizer having a quantizer input and a quantizer output, wherein the quantizer input is connected to the filter output; a digital integrator having a digital integrator input and a digital integrator output, wherein the digital integrator output is configured to provide a multi-bit output signal, the digital integrator input is connected to the quantizer output, and the digital integrator output is connected to the output terminal; and a main feedback digital to analog converter having a main feedback converter input and a main feedback converter output, wherein the main feedback converter input is connected to the digital integrator output, and the main feedback converter output is connected to the subtracting input of the main summer.

主权项

1. An analogue to digital converter comprising:
an input terminal configured to receive an analogue input signal; an output terminal configured to provide an output digital signal; a main summer having a summing input, a subtracting input and a summing output, wherein the summing input is connected to the input terminal; an analogue filter having a filter input and a filter output, wherein the filter input is connected to the summing output; a quantizer having a quantizer input and a quantizer output, wherein the quantizer input is connected to the filter output; a digital integrator having a digital integrator input and a digital integrator output, wherein the digital integrator output is configured to provide a multi-bit output signal, the digital integrator input is connected to the quantizer output, and the digital integrator output is connected to the output terminal; a main feedback digital to analogue converter having a main feedback converter input and a main feedback converter output, wherein the main feedback converter input is connected to the digital integrator output, and the main feedback converter output is connected to the subtracting input of the main summer; and an intermediate feedback digital to analogue converter having an intermediate feedback converter input and an intermediate feedback converter output, wherein the intermediate feedback converter input is connected to the quantizer output.