Method and apparatus for filtering a clock signal

Details Method and apparatus for filtering a clock signal Method and apparatus for filtering a clock signal

2005-03-15

2005-03-15

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Wave-shaping

C333S187000, C327S165000, C307S106000

Reexamination Certificate

active

06867659

ABSTRACT:
A method and an apparatus are provided for filtering a substantially square wave signal. At least a portion of the substantially square wave signal is applied to a first filter adapted to pass a range of frequencies adjacent the fundamental frequency and produce a first filtered signal. At least a portion of the substantially square wave signal is also applied to a plurality of second filters, where each of the second plurality of filters is adapted to pass a range of frequencies adjacent an odd harmonic component of the fundamental frequency and produce a second filtered signal. The first signal and the plurality of second filtered signals are combined to produce a representation of a square wave signal having a frequency substantially corresponding to the fundamental frequency.

REFERENCES:
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patent: 4518936 (1985-05-01), Sutphin, Jr.
patent: 5696491 (1997-12-01), White et al.
patent: 5734285 (1998-03-01), Harvey
patent: 6356129 (2002-03-01), O'Brien et al.
patent: 6654467 (2003-11-01), York et al.
patent: WO 9859294 (1998-12-01), None

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