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CMOS image sensor with testing circuit for verifying operation thereof

  • US 6,633,335 B1
  • Filed: 02/26/1999
  • Issued: 10/14/2003
  • Est. Priority Date: 02/28/1998
  • Status: Expired due to Term
First Claim
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1. A CMOS image sensor comprising:

  • a control/interface means for controlling the CMOS image sensor and outputting test mode information according to a request from a user by using a state machine;

    a pixel array including a plurality of pixels sensing images from an object and generating analogue signals according to an amount of incident light;

    a conversion means for converting the analogue signals into digital signals to be processed in a digital logic circuit; and

    a logic circuit for testing misfunction of the conversion means and the control/interface means, in response to the test mode information.

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