Patent ID: 7492295
Filing Date: 2009-02-17
Classification: H03M

Abstract:
1. A tracking analog to digital converter, comprising: a feed forward path comprising a comparator and a digital integrator coupled thereto configured to provide a first data word in response to the comparator's output signal; a feedback path comprising a digital to analog converter comprising an output coupled to a first input of the comparator; a voltage divider comprising a divider ratio that is selectable in response to a first selection signal, wherein the voltage divider is coupled upstream to a second input of the comparator; a scaling device connected to an output of the digital integrator, and configured to provide a second data word to the feedback path, wherein the second data word is derived from the first data word in response to a scaling ratio selected by a second selection signal; and a control circuit configured to provide the first and second selection signal in response to the first data word or the second data word.