Pumping circuit with amplitude limited to prevent an over pumpin

Details Pumping circuit with amplitude limited to prevent an over pumpin Pumping circuit with amplitude limited to prevent an over pumpin

1998-07-31

2000-01-25

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327540, G05F 110

Patent

active

060182644

ABSTRACT:
The pumping circuit for pumping the internal voltage supplied to a semiconductor device is disclosed, which is directed to comparing an internal voltage with previously set two reference voltages and differently varying a swing width of an output pulse from an oscillator in accordance with a result of the comparison. When there is a big difference between the internal voltage and a desired first reference voltage, the swing width of the output pulse from the oscillator is normally set, and when the internal voltage becomes the first reference voltage, the swing width of the ouput pulse from the oscillator is decreased, and when the swing width is decreased, the increasing width of the level of the internal voltage which is pumped and supplied to the semiconductor device is decreased, so that the over pumping of the internal voltage is prevented.

REFERENCES:
patent: 5027053 (1991-06-01), Ohri et al.
patent: 5077518 (1991-12-01), Han
patent: 5394026 (1995-02-01), Yu et al.
patent: 5412331 (1995-05-01), Jun et al.
patent: 5553030 (1996-09-01), Tedrow et al.

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