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Image sensor having boosted reset

  • US 7,233,353 B2
  • Filed: 04/06/2006
  • Issued: 06/19/2007
  • Est. Priority Date: 07/26/2000
  • Status: Expired due to Term
First Claim
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1. An image sensor, comprising:

  • a photosensitive region;

    a voltage boosting circuit for producing a boosted reset voltage on a reset line at a level higher than a power supply output voltage level, said voltage boosting circuit comprising a first capacitor, a precharge circuit for precharging said first capacitor and an isolating circuit for isolating said capacitor, said isolating circuit is not forward biased by a voltage that is greater than the power supply voltage, wherein a charge on said first capacitor is used as said boosted reset voltage; and

    a voltage protection circuit, said voltage protection circuit being connected to said reset line and protecting at least one transistor against being forward biased by said boosted reset voltage.

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