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Multi-zone approach for active/passive sensing

  • US 8,934,087 B1
  • Filed: 04/30/2012
  • Issued: 01/13/2015
  • Est. Priority Date: 04/29/2011
  • Status: Active Grant
First Claim
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1. An imaging device, comprising:

  • a sensor array of M×

    N pixels, wherein all available M×

    N pixels are used for imaging of a target during a passive mode, and a subset of the available M×

    N pixels is used for imaging during an active mode, wherein the subset of the available M×

    N pixels is less than all available M×

    N pixels; and

    a readout circuit operatively coupled to the M×

    N sensor array, wherein each pixel of the array is associated with an input cell of the readout circuit, and the input cells associated with the subset of the available M×

    N pixels are configured differently than the other available input cells, and wherein in the active mode, input cells not associated with the subset of the available M×

    N pixels can be powered down.

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