Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1997-08-18
2000-06-20
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327537, G05F 302
Patent
active
060782129
ABSTRACT:
A charge pump employs N pump stages to transform an input supply voltage to a pump output voltage, such as a programming voltage used in a non-volatile memory. Each pump stage receives a stage input voltage and provides a stage output voltage. A first pump stage receives the input supply voltage as its stage input voltage. An output transistor is configured as an output diode coupled between the Nth stage output voltage and the pump output voltage. The output transistor has a threshold voltage which produces a voltage drop across the output diode. An output threshold voltage canceler compensates for the threshold voltage of the output transistor.
REFERENCES:
patent: 5029063 (1991-07-01), Lingstaedt et al.
patent: 5335200 (1994-08-01), Coffman et al.
patent: 5422586 (1995-06-01), Tedrow et al.
patent: 5489870 (1996-02-01), Arakawa
patent: 5521547 (1996-05-01), Tsukada
patent: 5589793 (1996-12-01), Kassapian
Cunningham Terry D.
Micro)n Technology, Inc.
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