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Programmable gain ADC

  • US 6,307,497 B1
  • Filed: 08/11/2000
  • Issued: 10/23/2001
  • Est. Priority Date: 06/19/2000
  • Status: Expired due to Term
First Claim
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1. A programmable gain circuit for an analog-to-digital converter, comprising:

  • a sampling capacitor for storing a sample of a voltage representative of an analog signal to be converted to a corresponding digital signal;

    a comparator circuit for comparing said sampled voltage with a reference analog signal;

    a digital-to-analog converter (DAC) for generating said reference analog signal; and

    a switched capacitor circuit, including a plurality of switched capacitors coupled between an output of said DAC and an input circuit of said comparator, wherein a desired gain can be achieved as a function of a switched arrangement of said switched capacitors.

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