Low power high voltage ramp-up control circuit

Details Low power high voltage ramp-up control circuit Low power high voltage ramp-up control circuit

2005-12-27

2005-12-27

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S544000, C365S227000

Reexamination Certificate

active

06980047

ABSTRACT:
A circuit, and a method, provide low power high voltage ramp-up control for on-chip semiconductor power supplies, efficiently generating on-chip high voltage to support programming of electrically erasable programmable read only memories, EEPROMs or flash memory. The on-chip efficiency is achieved by eliminating output leakage. In addition, a feedback-controlled transistor is utilized to slow down the frequency required from a current controlled oscillator stage, and to provide the on-chip high voltage with low power dissipation.

REFERENCES:
patent: 4488060 (1984-12-01), Simko
patent: 5365121 (1994-11-01), Morton et al.
patent: 5408133 (1995-04-01), Honnigford et al.
patent: 5872733 (1999-02-01), Buti et al.
patent: 5986936 (1999-11-01), Ravazzini

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