Differential duty cycle restoration

Details Differential duty cycle restoration Differential duty cycle restoration

2007-07-31

2007-07-31

Lam, Tuan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

C327S172000

Reexamination Certificate

active

11211824

ABSTRACT:
Embodiments of the invention provide methods and apparatuses for restoring a duty cycle of a complementary output signal pair. In one embodiment, the output signal pair is brought in phase with a complementary input signal pair by delaying a complementary intermediate signal pair from which the output signal pair is generated. The intermediate signal pair is switched to a first logic state in response to detecting a crossing point between rising and falling signals of the output signal pair. The intermediate signal pair is switched to a second logic state in response to detecting a crossing point between rising and falling signals of the input signal pair.

REFERENCES:
patent: 5614855 (1997-03-01), Lee et al.
patent: 6169434 (2001-01-01), Portmann
patent: 6570944 (2003-05-01), Best et al.
patent: 7116143 (2006-10-01), Deivasigamani et al.

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