Phase adjustment circuit including a ring oscillator in a phase

Details Phase adjustment circuit including a ring oscillator in a phase Phase adjustment circuit including a ring oscillator in a phase

1997-12-10

1999-12-21

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular frequency control means

331 45, 331 57, 331 74, 331177R, H03L 7099, H03B 502

Patent

active

06005445&

ABSTRACT:
A phase adjustment circuit includes a ring oscillator which is phase locked to an external pixel clock by a phase locked loop. The ring oscillator is formed of n number of stages of variable delay circuits providing n+1 outputs of substantially equal phase differences. A control signal generation circuit is responsive to a phase control signal to generate n+1 weighting coefficients for weighting the n+1 outputs from the ring oscillator in a weighting circuit which produces a phase adjusted output signal.

REFERENCES:
patent: 4954824 (1990-09-01), Yamada et al.
patent: 5126691 (1992-06-01), Mijuskovic et al.
patent: 5394116 (1995-02-01), Kasturia

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