Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Parameter related to the reproduction or fidelity of a...
Reexamination Certificate
2005-05-03
2008-03-18
Hirshfeld, Andrew H. (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Parameter related to the reproduction or fidelity of a...
C702S190000
Reexamination Certificate
active
07345490
ABSTRACT:
A method for calibrating a filter begins with the filter filtering a first signal having a first frequency to produce a first filtered signal, wherein the first frequency is in a known pass region of the filter. The processing continues by measuring signal strength of the first filtered signal to produce a first measured signal strength. The processing continues with the filter filtering a second signal having a second frequency to produce a second filtered signal, wherein the second frequency is at a desired corner frequency of the filter. The processing continues by measuring signal strength of the second filtered signal to produce a second measured signal strength. The processing continues by comparing the first measured signal strength with the second measured signal strength to determine whether the filter has attenuated the second signal by a desired attenuation value with respect to the first signal. The processing continues by adjusting filter response of the filter to produce an adjusted filter response when the filter has not attenuated the second signal by the desired attenuation value with respect to the first signal.
REFERENCES:
patent: 4858159 (1989-08-01), Wheelwright et al.
patent: 5101509 (1992-03-01), Lai
patent: 5245646 (1993-09-01), Jackson et al.
patent: 5280638 (1994-01-01), Porambo et al.
patent: 5903857 (1999-05-01), Behrens et al.
patent: 5914633 (1999-06-01), Comino et al.
patent: 6003051 (1999-12-01), Okazaki
patent: 6014554 (2000-01-01), Smith
patent: 6018702 (2000-01-01), Luiz
patent: 6356163 (2002-03-01), Dunsmore et al.
patent: 6441983 (2002-08-01), Philpott et al.
patent: 6584422 (2003-06-01), Bhaumik et al.
patent: 6731145 (2004-05-01), Humphreys et al.
patent: 6885181 (2005-04-01), Roo
patent: 6909292 (2005-06-01), Kavadias
patent: 6914437 (2005-07-01), Ibrahim et al.
patent: 7054606 (2006-05-01), Sheng et al.
Ibrahim Brima B.
Kim Hea Joung
Broadcom Corporation
Garlick, Harrison & Markison:
Hirshfeld Andrew H.
Nguyen Hoai-An D.
Smith Jessica W.
LandOfFree
Filter calibration does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Filter calibration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filter calibration will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3976635