Analog to digital converter

  • US 7,274,321 B2
  • Filed: 11/14/2005
  • Issued: 09/25/2007
  • Est. Priority Date: 03/21/2005
  • Status: Active Grant
First Claim
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1. A analog to digital converter, comprising:

  • an input for receiving an input signal to be digitised;

    a first converter core for performing a first part of an analog to digital conversion, said first converter core comprising at least three switched capacitor analog to digital conversion engines operating in parallel and in a co-operative manner and for outputting a first digital result and an analog representation of the first digital result;

    a first residue generator for generating a first residue as a difference between the input signal and the analog representation of the first digital result;

    a second converter core for performing a second part of the analog to digital conversion by converting the first residue;

    whereinthe analog to digital further comprises a controller for controlling the operation of the engines such that the engines co-operate to perform a successive approximation search, and wherein the first converter core is further operable to act as the first residue generator.

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