Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1995-08-11
1997-01-07
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327157, 331 17, 331 25, G05F 110
Patent
active
055921205
ABSTRACT:
A charge pump system for charging an integrating capacitor includes a current source for supplying a first current of a first polarity, a second current of the opposite polarity which is a fraction of the first current, a third current of the opposite polarity, and a fourth current of the first polarity which is a fraction of the third current, and a switching device for simultaneously interconnecting both the first and second currents to the integrating capacitor to provide a first pump down charging current which is the fractional difference between the first and second currents, and also alternately selectively interconnecting both the third and fourth currents to the integrating capacitor to provide a second pump up charging current which is a fractional difference between the third and fourth currents and opposite in polarity to the first charging current.
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Palmer Wyn
Viana Fernando
Analog Devices Inc.
Callahan Timothy P.
Wells Kenneth B.
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