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Method and system to enhance differential dynamic range and signal/noise in CMOS range finding systems using differential sensors

  • US 7,321,111 B2
  • Filed: 12/28/2006
  • Issued: 01/22/2008
  • Est. Priority Date: 04/12/2004
  • Status: Expired due to Fees
First Claim
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1. A method to increase effective differential dynamic range of a differential pixel responsive to optical energy, a detection response V(t) of said differential pixel having a common mode component and a differential component, the method including:

  • (a) adding at least one compensating offset to avoid a saturation magnitude differential signal level; and

    (b) recording effective sum of compensating offsets added to avoid said saturation magnitude;

    wherein effective value of said differential signal V(t) is proportional to VOUT ±



    (effective sum of said compensating offsets), where K is a constant.

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