Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2008-03-14
2009-06-09
Nguyen, Khai M (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S155000
Reexamination Certificate
active
07545302
ABSTRACT:
A sigma-delta difference-of-squares RMS-to-DC converter and method for performing such a conversion in which an analog feedback signal is combined with an analog input signal, following which the combined signals are multiplied to produce an analog product signal that includes at least one signal component corresponding to a difference between a square of the analog feedback signal and a square of the analog input signal. This analog product signal is filtered and digitized to produce a digital output signal to be available for use downstream in or with the host system, with such digital output signal also being converted to the analog feedback signal.
REFERENCES:
patent: 6172549 (2001-01-01), Gilbert
patent: 6204719 (2001-03-01), Gilbert
patent: 6359576 (2002-03-01), Petrofsky
patent: 6549057 (2003-04-01), Gilbert
patent: 6584157 (2003-06-01), Van Der Zwan et al.
patent: 7002394 (2006-02-01), Gilbert
patent: 7197292 (2007-03-01), Kouwenhoven et al.
patent: 2007/0270116 (2007-11-01), Kouwenhoven
Candy, James, “A Use of Limit Cycle Oscillations to Obtain Robust Analog-to-Digital Converters”, IEEE Transactions on Communications, vol. Com-22, No. 3, Mar. 1974, pp. 298-305.
Gilbert, B., “Novel Technique for R.M.S.-D.C. Conversion Based on the Difference of Squares”, Electronics Letters, vol. 11, No. 8, Apr. 17, 1975, pp. 181-182.
Kouwenhoven, M., et al., “A 2GHz Mean-Square Power Detector with Integrated Offset Chopper”, IEEE International Solid-State Circuits Conf., Feb. 2005, pp. 124-125; and 588.
Candy, James, et al., “Delta-Sigma Data Converters, Theory, Design and Simulation”, IEEE Circuits & Systems Society, 1992, pp. 1-35.
Van De Plassche, Rudy, “CMOS Integrated Analog-to-Digital and Digital-to-Analog Converters”, Kluwer Intl. Series in Engineering, 2003, pp. 1-33; 56-75; 416-435.
U.S. Appl. No. 12/048,610, filed Mar. 14, 2008, “Sigma-Delta Difference-of-Squares RMS-to-DC Converter with Forward and Feedback Paths Signal Squaring”, Silva et al.
Kouwenhoven Michael Hendrikus Laurentius
Silva Paulo Gustavo Raymundo
National Semiconductor Corporation
Nguyen Khai M
Vedder Price P.C.
LandOfFree
Sigma-delta difference-of-squares RMS-to-DC converter with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sigma-delta difference-of-squares RMS-to-DC converter with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sigma-delta difference-of-squares RMS-to-DC converter with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4124973