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SHIFT REGISTER

  • US 20100226473A1
  • Filed: 10/01/2009
  • Published: 09/09/2010
  • Est. Priority Date: 03/05/2009
  • Status: Active Grant
First Claim
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1. A shift register comprising:

  • a plurality of cascade-connected stages, each stage for generating an output signal at an output end based on a clock signal, a first control signal, each stage comprising;

    a pull-up module coupled to a first node, for providing the output signal at the output end based on the clock signal;

    a pull-up driving module coupled to the first node, for turning on the pull-up module in response to the first control signal;

    a first pull-down module coupled to the first node and a first supply voltage, for adjusting voltage level on the first node to the first supply voltage in response to a second control signal;

    a second pull-down module coupled to the output end and a second supply voltage, for adjusting voltage level on the output end to the second supply voltage in response to the second control signal; and

    a third pull-down module coupled to a second node and a third supply voltage, for adjusting voltage level on the second node to the third supply voltage in response to a third control signal.

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