Reconfigurable multiple-path pipeline ADC architecture incorporating multiple-input signal-averaging MDAC

摘要

A pipeline analog-to-digital converter (ADC) includes a first conversion stage of the pipeline ADC that receives an input signal and that comprises, in a first signal path, a first ADC that converts the input signal, a first digital-to-analog converter (DAC) that converts an output of the first ADC, a first subtractor that subtracts an output of the first DAC from the input signal, and a first amplifier that amplifies an output of the first subtractor and generates a first residue of the first conversion stage; and in a second signal path, a second DAC that converts the output of the first ADC, a second subtractor that subtracts an output of the second DAC from the input signal, and a second amplifier that amplifies an output of the second subtractor and generates a second residue of the first conversion stage. A control module selectively enables and disables the second path.

主权项

1. A pipeline analog-to-digital converter (ADC) comprising:
a first conversion stage of the pipeline ADC that receives an input signal and that comprises
in a first signal path:
a first ADC that converts the input signal,a first digital-to-analog converter (DAC) that converts an output of the first ADC,a first subtractor that subtracts an output of the first DAC from the input signal, anda first amplifier that amplifies an output of the first subtractor and generates a first residue of the first conversion stage; andin a second signal path:
a second DAC that converts the output of the first ADC,a second subtractor that subtracts an output of the second DAC from the input signal, anda second amplifier that amplifies an output of the second subtractor and generates a second residue of the first conversion stage; and a control module that selectively enables and disables the second path.