Low injection charge pump

Details Low injection charge pump Low injection charge pump

2005-05-10

2005-05-10

Nguyen, Linh My (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S157000

Reexamination Certificate

active

06891411

ABSTRACT:
A fast acting charge pump is provided which is suitable for use in a locked loop circuit where very short duration first and second adjustment pulses are produced by a phase detector. The first complement of the second adjustment pulses are used to switch the output of the charge pump through respective pairs of switching and associated biasing transistors, while a complement of the first and second adjustment pulses are respectively capacitively coupled to interconnection nodes of the pairs of switching and biasing transistors.

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J. Alvarez, “A Wide-Bandwidth Low-Voltage PLL for PowerPC™ Microprocessors,” IEEE Journal of Solid-State Circuits, vol. 30, No. 4, pp. 383-391, Apr. 1995.

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