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LEVEL SHIFTER FOR GATE DRIVER

  • US 20080186058A1
  • Filed: 02/01/2008
  • Published: 08/07/2008
  • Est. Priority Date: 02/02/2007
  • Status: Active Grant
First Claim
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1. A level shifter, wherein multiple stages of the level shifters are suitable to be serially-connected into a gate drive circuit, and each stage comprising an output end coupled to an input end of a next stage level shifter, and a reset end for receiving an output signal of the next stage level shifter, the level shifter comprising:

  • a first node and a second node;

    a driving transistor, provided with a gate, a source, and a drain, wherein the gate is coupled to the first node, the drain is coupled to a clock signal, and the source functioning as the output end outputs an output signal;

    a reset transistor, provided with a gate, a source, and a drain, wherein the gate receives the output signal of the next stage level shifter as a reset signal, the source is coupled to a first low-potential voltage, and the drain is coupled to the first node;

    a charge/discharge circuit, for receiving an input signal and a control signal, and coupled to the second node;

    a threshold voltage detector, for receiving the control signal, and coupled to the first node and the source of the driving transistor; and

    a memory capacitor, provided with a first end and a second end respectively coupled to the first node and the second node, for memorizing a threshold voltage of the driving transistor.

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