Self-calibrating phase locked loop charge pump system and...

Details Self-calibrating phase locked loop charge pump system and... Self-calibrating phase locked loop charge pump system and...

2006-03-07

2006-03-07

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

Reexamination Certificate

active

07009432

ABSTRACT:
A charge pump circuit is disclosed that includes a positive current output circuit for providing a positive current to an output of the charge pump circuit, a negative current output circuit for providing a negative current to the output of the charge pump circuit, and a calibration unit for permitting the charge pump circuit to be adjusted to reduce any current mismatch between the positive and negative currents and to provide that any current mismatch is integrated into a PLL loop filter capacitance.

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