Circuit for generating negative voltage and a semiconductor...

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage

Reexamination Certificate

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Details

C327S538000

Reexamination Certificate

active

07898317

ABSTRACT:
A circuit for generating negative voltage includes a variable period oscillator configured to generate an oscillator signal enabled in response to a detection signal and to determine a period of the oscillator signal in response to a control signal, a pump configured to perform pumping operations in response to the oscillator signal and to generate a negative voltage by the pumping operations, a negative voltage detecting unit configured to detect the level of the negative voltage to generate the detection signal, and a gate-induced drain leakage current detecting unit configured to measure the amount of a gate-induced drain leakage current to generate the control signal.

REFERENCES:
patent: 5396114 (1995-03-01), Lee et al.
patent: 6741504 (2004-05-01), Van De Graaff
patent: 7015684 (2006-03-01), Chen
patent: 1020050052634 (2005-06-01), None
patent: 1020060122574 (2006-11-01), None

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