Method and apparatus for phase control of a...

Details Method and apparatus for phase control of a... Method and apparatus for phase control of a...

2006-07-18

2006-07-18

Mai, Lam T. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S126000, C327S091000

Reexamination Certificate

active

07079064

ABSTRACT:
A digital-to-analog converter system is provided that controls a phase of an output signal produced by a digital-to-analog converter (DAC). A digital input signal and a phase control signal are each applied to the DAC. The DAC then produces an analog output signal based on the input signal and the phase control signal, wherein the analog signal comprises an output with a frequency and a phase component. The DAC further produces a phase adjustment signal that is conveyed to an auxiliary circuit that determines a phase difference between a reference signal and the phase adjustment signal and generates the phase control signal based on the phase difference, wherein a phase of the analog output signal is adjusted based on the phase control signal. By controlling the phase of an analog output signal of a DAC, DAC-to-DAC skew may be minimized.

REFERENCES:
patent: 4833445 (1989-05-01), Buchele
patent: 6005507 (1999-12-01), Nakatsu et al.
patent: 6337650 (2002-01-01), Mitsutani

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