Self-correcting buffer

Details Self-correcting buffer Self-correcting buffer

2006-12-28

2009-06-02

Luu, An T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

C327S172000, C330S259000

Reexamination Certificate

active

07541852

ABSTRACT:
In general, in one aspect, the disclosure describes an apparatus having a capacitor to receive an input signal and to block DC portion of the incoming signal. A buffer is used to receive the DC blocked incoming signal and output an outgoing signal. A low pass filter is used to convert duty cycle error in an outgoing signal to a DC offset and to provide the DC offset to the capacitor. The DC offset is used to bias the capacitor. The biasing of the capacitor can adjust the DC blocked incoming signal so as to reduce the duty cycle error in the outgoing signal.

REFERENCES:
patent: 4280175 (1981-07-01), Leuthold
patent: 4564821 (1986-01-01), Reichart
patent: 5113090 (1992-05-01), Imaizumi et al.
patent: 5166632 (1992-11-01), MacKenzie
patent: 5491441 (1996-02-01), Goetschel et al.
patent: 5565800 (1996-10-01), Kobayashi
patent: 5708376 (1998-01-01), Ikeda
patent: 5883535 (1999-03-01), Kato
patent: 6215333 (2001-04-01), Kuttner
patent: 2007/0115050 (2007-05-01), Blon

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