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Floating gate analog voltage level shift circuit and method for producing a voltage reference that operates on a low supply voltage

  • US 7,113,017 B2
  • Filed: 07/01/2004
  • Issued: 09/26/2006
  • Est. Priority Date: 07/01/2004
  • Status: Expired due to Fees
First Claim
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1. A floating gate voltage level shift circuit, comprising:

  • a first floating gate for storing charge;

    a second floating gate for storing charge;

    a voltage shift capacitor having a first terminal coupled to the second floating gate and a second terminal; and

    a differential amplifier, coupled between the first floating gate and the second floating gate, for causing the charge level on the first floating gate to be modified during a SET operation as a function of the voltage on the second floating gate;

    wherein, during the SET operation, the second terminal of the voltage shift capacitor is coupled to a first predetermined voltage;

    wherein, during a READ operation, the second terminal of the voltage shift capacitor is coupled to a second predetermined voltage.

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