Low injection charge pump

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing

Reexamination Certificate

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Details

C327S382000

Reexamination Certificate

active

07492196

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

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