Clock formation circuit

Details Clock formation circuit Clock formation circuit

1990-07-16

1991-09-24

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

331 17, 331 25, H03D 324

Patent

active

050520326

ABSTRACT:
A clock formation circuit to form from a digital data signal a formation clock signal corresponding to a data clock controlling an inversion timing of the digital data signal having a circuitry which provides an information signal of the phase difference between the digital data signal and the formation clock signal and circuitry which outputs the formation clock signal having a frequency controlled based at least on an integrated information signal obtained by limiting a current flowing through a capacitor having a terminal voltage there across varying in accordance with the phase difference information signal.

REFERENCES:
patent: 4546329 (1985-10-01), Unger
patent: 4574254 (1986-03-01), Glance
patent: 4580100 (1986-04-01), Suzuki et al.
patent: 4724401 (1988-02-01), Hogge, Jr. et al.
patent: 4757279 (1988-07-01), Balzano
patent: 4857866 (1989-08-01), Tateishi
patent: 4885553 (1989-12-01), Hietala
patent: 4901026 (1990-02-01), Phillips et al.
patent: 4904958 (1990-02-01), Wyatt
patent: 4929917 (1990-05-01), Yokogawa et al.

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