Self-timing four-phase clock generator

Details Self-timing four-phase clock generator Self-timing four-phase clock generator

1993-06-02

1995-03-14

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

331 57, 327295, 327400, H03K 304, H03K 513

Patent

active

053980018

ABSTRACT:
A four phase clock generator, which can be employed to operate a charge pump, is configured using coupling elements that ensure that the four phases are non-overlapping. Two of the phases are created with delay buffers that have substantial delays that mainly determine the clock frequency. The delay buffers and coupling elements produce delays that are made variable in response to a control current. This provides a clock whose frequency is proportional to a control current.

REFERENCES:
patent: 4554465 (1985-11-01), Koike
patent: 4617529 (1986-10-01), Suzuki
patent: 4794275 (1988-12-01), Traa
patent: 4853654 (1989-08-01), Sakurai
patent: 4910471 (1990-03-01), Brahmbhatt et al.
patent: 5068628 (1991-11-01), Ghoshal
patent: 5081428 (1992-01-01), Atriss et al.
patent: 5130566 (1992-07-01), Nguyen
patent: 5302920 (1994-04-01), Bitting

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