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Amplification with feedback capacitance for photodetector signals

  • US 7,183,531 B2
  • Filed: 03/31/2004
  • Issued: 02/27/2007
  • Est. Priority Date: 03/31/2004
  • Status: Active Grant
First Claim
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1. A pixel circuit comprising:

  • a photodetector that generates charge;

    a storage node for receiving charge generated by said photodetector;

    an amplifier having an input coupled to said storage node and an output that provides an amplified input signal, said amplifier having a first power mode during a first operational period and a second power mode during a second operational period;

    a feedback capacitor, said capacitor providing feedback between the amplifier'"'"'s output and input; and

    a reset switch that resets said storage node and said amplifier when closed.

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