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On chip multiple voltage generation using a charge pump and plural feedback sense circuits

  • US 4,752,699 A
  • Filed: 12/19/1986
  • Issued: 06/21/1988
  • Est. Priority Date: 12/19/1986
  • Status: Expired due to Fees
First Claim
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1. An on-chip multi-level voltage generating system comprising:

  • a charge pump circuit means having at least one drive input connected to a low voltage power supply and having an output for supplying multiple voltages;

    a plurality of selectable feedback paths connected to the output of said charge pump circuit means with each feedback path controlling the charge pump circuit means to output a selected voltage level; and

    a control means coupled to a drive input of the charge pump and in series with each feedback path;

    said control means responsive to enabling signals to activate the feedback path corresponding to the selected voltage level.

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