Bootstrapped charge pump driver in a phase-lock loop

Details Bootstrapped charge pump driver in a phase-lock loop Bootstrapped charge pump driver in a phase-lock loop

2008-04-29

2008-04-29

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S148000

Reexamination Certificate

active

07365582

ABSTRACT:
A charge pump includes first and second pairs of differential transistors. Each transistor includes control, first, and second terminals. First and second charge pump drivers communicate with the control terminal of one of the first pair of differential transistors and one of the second pair of differential transistors, respectively. Third and fourth charge pump drivers communicate with the control terminal of the other of the first pair of differential transistors and the other of the second pair of differential transistors, respectively. The first through fourth charge pump drivers include respective pairs of differential transistors that receive control signals from respective control circuits.

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