System and method for extracting and conveying modulated AC...

Details System and method for extracting and conveying modulated AC... System and method for extracting and conveying modulated AC...

2006-03-27

2010-11-02

Pope, Daryl (Department: 2612)

Communications: electrical

Visual indication

Audio responsive lamp

C340S315000, C340S538110, C340S538000, C340S315000, C340S538120, C340S538150, C340S315000, C340S315000

Reexamination Certificate

active

07825822

ABSTRACT:
An economical system and method for extracting amplitude and frequency information from a modulated AC signal are provided. In one embodiment, the invention includes a circuitry implementing op amps, a dual diode, a filter, and a comparator to receive and manipulate the modulated AC signal. The dual diode receives and splits the AC signal into two separate paths, including a baseline path and a filtering path. The AC signal passing through the baseline path remains substantially unchanged, and the AC signal passing through the filtering path passes through a low-pass filter. The signal is then sent through a comparator for comparing amplitudes of the AC signal from the two paths, and the comparator output is received by a microprocessor for controlling a display that generates a visual indicia responsive to the comparator output.

REFERENCES:
patent: 3568144 (1971-03-01), Streb
patent: 3651458 (1972-03-01), Reynolds et al.
patent: 4327319 (1982-04-01), Swisher et al.
patent: 4359601 (1982-11-01), England
patent: 4468792 (1984-08-01), Baker et al.
patent: 4480294 (1984-10-01), Carboni
patent: 4768086 (1988-08-01), Paist
patent: 4972533 (1990-11-01), Brown
patent: 5316293 (1994-05-01), Hamilton
patent: 5376245 (1994-12-01), McLeod
patent: 5400230 (1995-03-01), Nicoletti
patent: 5499189 (1996-03-01), Seitz
patent: 5594384 (1997-01-01), Carroll et al.
patent: 5610451 (1997-03-01), Symonds
patent: 5947789 (1999-09-01), Chan
patent: 5961201 (1999-10-01), Gismondi
patent: 6095661 (2000-08-01), Lebens et al.
patent: 6241362 (2001-06-01), Morrison
patent: 6311350 (2001-11-01), Kaiserman et al.
patent: 6746131 (2004-06-01), Goldstein et al.
patent: 6788011 (2004-09-01), Mueller et al.
patent: 6888322 (2005-05-01), Dowling et al.
patent: 7258463 (2007-08-01), Sloan et al.
patent: 2002/0017879 (2002-02-01), Denny et al.
patent: 2003/0178960 (2003-09-01), Kassing
patent: 2004/0067713 (2004-04-01), Fong
patent: 2004/0067714 (2004-04-01), Fong
patent: 199 41 589 (2000-08-01), None
patent: 0328358 (1989-08-01), None
patent: 0494310 (1992-07-01), None
patent: 0 959 297 (1999-11-01), None
patent: 1 435 483 (2004-07-01), None
patent: 2288903 (1995-01-01), None
patent: 2349942 (2000-11-01), None
patent: 6215750 (1987-01-01), None
patent: 756523 (1995-03-01), None
patent: 831213 (1996-02-01), None
patent: 10123591 (1998-05-01), None
patent: 200322012 (2000-11-01), None
patent: 91/19278 (1991-12-01), None
patent: 01/90828 (2001-11-01), None
patent: 02/21432 (2002-03-01), None
Vitta Rao, “Two LEDs Blend and Blink to Indicate Six States”, Electronic Design, vol. 30, No. 16, Aug. 5, 1982, p. 220.
“Sound-to-light Unit Effects on a Budget”, by K Walraven,Elektor Electronics, Tunbridge Wells, GB, vol. 22, No. 246, Jul. 1, 1996, pp. 78-81, 83.
Walraven K., “Sound-to-Light Unit Light Effects on a Buget”, Elektor Electronics, Tunbrige Wells, GB, Jul. 1, 1996, pp. 78-81, 83, vol. 22, No. 246.

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