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VOLTAGE GENERATOR, ANALOG-TO-DIGITAL CONVERTER, AND IMAGE SENSOR SYSTEM

  • US 20080296473A1
  • Filed: 05/02/2008
  • Published: 12/04/2008
  • Est. Priority Date: 06/01/2007
  • Status: Active Grant
First Claim
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1. A voltage generator comprising:

  • a ladder resistor circuit for generating a plurality of different reference voltages;

    a plurality of switching circuits corresponding to a plurality of taps of the ladder resistor circuit, each of the plurality of switching circuits being connected at one end to a corresponding one of the taps and connected at the other end to an output node, and having a variable on-resistance value; and

    a control circuit for selecting continuous n (where n is any integer equal to or greater than

         2) of the plurality of switching circuits, turning the n switching circuits on, and setting the respective on-resistance values of the n switching circuits.

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