Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2006-01-24
2006-01-24
Cunningham, Terry D. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S148000
Reexamination Certificate
active
06989698
ABSTRACT:
The present invention is to provide a charge pump circuit for improving switching speed and compensating mismatch between a source and a sink currents flowing to output terminal. A charge pump circuit according to the first embodiment of the present invention comprises a first and second switching elements, a discharging and charging elements, a biasing unit, a first and second compensating unit, a charge pumping unit, a current mirror unit, a control unit, and a biasing unit. The compensating circuit removes the deterioration owing to the parasitic capacitance, and the control circuit controls the charge that is flowed or emitted from the parasitic capacitance. A charge pump circuit according to the second embodiment of the present invention comprises a charge pumping unit, a current mirror unit, a control unit a biasing unit. The charge pump circuit decects the mismatch between the output currents via the control unit, and compensates the mismatch by the biasing unit.
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patent: 6054882 (2000-04-01), Izumikawa
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Cunningham Terry D.
Integrant Technologies Inc.
Shinjyu Global IP Counselors, LLP
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