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Programmable non-volatile analog voltage source devices and methods

  • US 5,388,064 A
  • Filed: 11/26/1991
  • Issued: 02/07/1995
  • Est. Priority Date: 11/26/1991
  • Status: Expired due to Term
First Claim
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1. A programmable non-volatile analog voltage source comprising, in a single integrated circuit:

  • a pair of electrically erasable floating gate differential analog voltage storage cells for storing an analog voltage as a difference between a pair of voltages stored in the differential analog voltage storage cells, and for providing as an output at least one analog voltage output in response thereto;

    buffer means responsive to the output of the differential analog voltage storage cells to provide a low impedance analog output in response thereto; and

    ,write means responsive to a write signal to cause an analog voltage input to be stored in the pair of electrically erasable floating gate differential analog voltage storage cells.

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