Digital-control-type phase-composing circuit system

Details Digital-control-type phase-composing circuit system Digital-control-type phase-composing circuit system

2007-05-01

2007-05-01

Nguyen, Linh My (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S160000

Reexamination Certificate

active

11305037

ABSTRACT:
A digital-control phase-composing circuit system has a phase-composing circuit which is supplied with two input clock signals having a phase difference therebetween and a control signal, and which composes an output clock signal having a phase between the phases of the two input clock signals on the basis of weighting through the control signal, a binary comparison circuit which compares the phase of the output clock signal to the phase of a reference clock signal, a first up/down counter which increments or decrements a first count value on the basis of the result of comparison made by the binary phase comparison circuit, outputs the most significant bit of the first count value, and outputs a clock pulse when a carry or a borrow occurs in the first count value, and a second up/down counter which operates on the basis of the clock pulse as an operating clock, increments or decrements a second count value on the basis of the most significant bit of the first count value, and outputs the second count value as the control signal.

REFERENCES:
patent: 5485490 (1996-01-01), Leung et al.
patent: 5487084 (1996-01-01), Lindholm
patent: 2001-217682 (2001-08-01), None

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