Patent ID: 7495595

Claim:
An analog-to-digital converter, comprising: a signal input; a sampling unit coupled to the signal input; a quantizer configured to provide an output word at its output depending on a signal at its input; an output storage element coupled to the input of the quantizer; a first filter stage comprising a first filter input coupled to an output of the sampling unit, an input storage element coupled to the first filter input, and a first and a second auxiliary storage element that are each selectively connected in parallel to the input storage element or to the output storage element in alternate fashion depending on a switching signal; and a feedback path comprising a digital-to-analog converter with an input configured to receive the output word, a first weighting element coupled between an output of the digital-to-analog converter and the output storage element, and a second weighting element coupled between an output of the digital-to-analog converter and the first filter input.