Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2005-12-30
2009-08-11
Cox, Cassandra (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C327S551000
Reexamination Certificate
active
07573326
ABSTRACT:
A tunable bandpass filter to provide a filtered differential clock signal in response to an input differential clock signal, where an embodiment comprises a transistor pair loaded by tunable loads, and a feedback circuit to tune the tunable loads. In some embodiments, the feedback circuit tunes the loads to maximize a small-signal differential gain. In other embodiments, the feedback circuit tunes the loads to minimize a metric indicative of jitter in the filtered differential clock signal. Other embodiments are described and claimed.
REFERENCES:
patent: 4888502 (1989-12-01), Jarrett
patent: 5353313 (1994-10-01), Honea
patent: 6597592 (2003-07-01), Carsten
patent: 6677822 (2004-01-01), Hasegawa
patent: 6765417 (2004-07-01), Mallinson
patent: 6768372 (2004-07-01), Jaussi et al.
patent: 7123729 (2006-10-01), Sendelweck
patent: 7307473 (2007-12-01), Kusunoki et al.
Casper Bryan K.
Hollis Timothy
Jaussi James E.
Mansuri Mozhgan
Mooney Stephen R.
Cox Cassandra
Intel Corporation
Schwegman Lundberg & Woessner, P.A.
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