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Voltage booster circuit of the charge-pump type with a bootstrapped oscillator

  • US 5,592,115 A
  • Filed: 06/06/1995
  • Issued: 01/07/1997
  • Est. Priority Date: 10/01/1992
  • Status: Expired due to Term
First Claim
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1. A transistor switching control circuit comprising:

  • a ring oscillator having an output that provides an oscillator signal at an oscillator frequency;

    a phase splitter stage coupled to the ring oscillator, having an input that receives the oscillator signal and an output that provides a plurality of non-overlapping phase-split signals substantially at the oscillator frequency;

    a non-bootstrapped output stage coupled to the phase splitter stage, having an input that receives the plurality of non-overlapping phase-split signals, and an output that provides a plurality of non-bootstrapped non-overlapping output signals that switch between a zero voltage and a supply voltage substantially at the oscillator frequency; and

    a bootstrapped output stage coupled to the phase splitter stage, having an input that receives the plurality of non-overlapping phase-split signals, and an output that provides a plurality of bootstrapped non-overlapping output signals that switch between the zero voltage and a voltage of greater magnitude than the supply voltage substantially synchronously with the plurality of non-bootstrapped non-overlapping output signals.

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