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Level shifting circuit having junction field effect transistors

  • US 7,646,233 B2
  • Filed: 07/28/2006
  • Issued: 01/12/2010
  • Est. Priority Date: 05/11/2006
  • Status: Expired due to Fees
First Claim
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1. A level shifting circuit, comprising:

  • a first driver p-type junction field effect transistor (JFET) of a having a source coupled to a reference supply node, a drain coupled to an output node, and a gate coupled to a first driver control node;

    a second driver n-type JFET having a source coupled to a boosted supply node and a drain coupled to the output node; and

    a first charge pump circuit coupled between the first driver control node and an input node coupled to receive an input signal, the first charge pump circuit coupling a first terminal of a first capacitor between the reference supply node and a power supply node in response to the input signal;

    whereinthe power supply node is coupled to receive a power supply potential, the reference supply node is coupled to receive a reference potential, the boosted power supply node is coupled to receive a boosted potential, the power supply potential is positive with respect to the reference potential, and the boosted potential is negative with respect to the reference potential.

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