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DA CONVERTER AND SOLID-STATE IMAGING DEVICE

  • US 20110050967A1
  • Filed: 07/28/2010
  • Published: 03/03/2011
  • Est. Priority Date: 08/28/2009
  • Status: Active Grant
First Claim
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1. A DA converter comprising:

  • a reference current generating circuit that generates a reference current;

    a plurality of current sources that supply currents according to the reference current;

    a voltage output circuit that outputs a voltage according to a current to be supplied thereto;

    a plurality of switch circuits provided for the current sources respectively to each switch a connection of each of the current sources to the voltage output circuit or a predetermined load;

    a control section that controls the plurality of switch circuits based on an input digital signal to select that of the plurality of current sources which is to be connected to the voltage output circuit, and outputs a voltage according to the digital signal from the voltage output circuit; and

    a switch that stops an operation of at least one of the plurality of current sources based on a control signal from the control section, without stopping an operation of the reference current generating circuit.

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