Duty ratio control apparatus and duty ratio control method

Details Duty ratio control apparatus and duty ratio control method Duty ratio control apparatus and duty ratio control method

2011-08-23

2011-08-23

Luu, An T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

C327S172000

Reexamination Certificate

active

08004332

ABSTRACT:
There are provided a duty ratio control apparatus for altering a duty ratio of a clock signal to output an altered clock signal, including a first variable delay section that outputs a first delayed clock signal generated by delaying the clock signal by a predetermined first delay time, and a phase comparing section that compares, in terms of phase, an edge of the clock signal and an edge of the first delayed clock signal and generates the altered clock signal having a pulse width determined by a phase difference obtained by the comparison, and a duty ratio control method.

REFERENCES:
patent: 5675620 (1997-10-01), Chen
patent: 6356129 (2002-03-01), O'Brien et al.
patent: 6687844 (2004-02-01), Zhang
patent: 7227920 (2007-06-01), Heikkila
patent: 7420399 (2008-09-01), Han
patent: 7423919 (2008-09-01), Lin
patent: 7791378 (2010-09-01), Sutardja et al.

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