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ANALOG MULTIPLEXER CONFIGURED TO REDUCE KICKBACK PERTURBATION IN IMAGE SENSOR READOUT

  • US 20100141822A1
  • Filed: 12/08/2008
  • Published: 06/10/2010
  • Est. Priority Date: 12/08/2008
  • Status: Active Grant
First Claim
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1. An analog multiplexer for multiplexing a plurality of input analog signal channels into a single output analog signal channel, the multiplexer comprising:

  • a plurality of input sampling circuits associated with respective ones of the input analog signal channels; and

    an amplifier having an input controllably connectable in turn to each of the input sampling circuits;

    wherein the analog multiplexer is further configured to connect at least a given one of the input analog signal channels to a sampling element of its corresponding input sampling circuit at a predetermined time prior to connecting the sampling element of that input sampling circuit to the input of the amplifier; and

    wherein the predetermined time is less than a fill clock cycle of a sampling clock of the amplifier.

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