Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2006-07-25
2006-07-25
Choe, Henry (Department: 2817)
Amplifiers
Modulator-demodulator-type amplifier
C330S251000
Reexamination Certificate
active
07081793
ABSTRACT:
Methods and apparatus are provided for efficiently amplifying or converting a signal. An input signal is decomposed into a plurality of two state signals, each two state signal having a respective on level and off level. This may involve sigma-delta modulation and phase splitting. For amplifier applications, each of the two state signals is amplified with a respective switching power amplifier to produce a respective amplified signal. The amplified signals are combined to produce an amplified version of the input signal. Signals may be adjusted for impairments associated with a subsequent processing operation such as the combining.
REFERENCES:
patent: 6734725 (2004-05-01), Masuda et al.
patent: 6747517 (2004-06-01), Lautzenhiser et al.
patent: 2002/0053945 (2002-05-01), Putzeys
Watanabe, S. et al., “DSP-based High Precision Current Tracking Control of Gradient Coil in Two-Paralleled PWM Amplifiers for MRI Systems”. Power Electronics Specialists Conference, 1998. PESC 98 Record. 29thAnnual IEEE Fukuoka, Japan May 17-22, 1998. New York, NY USA. pp. 916-921, XP010294962. ISBN: 0-7803-4489-8.
Antunes, V. M. E., et al., “Harmonic Distortion Reduction in Multi-Level PWM Modulators for Audio Power Amplifiers”. IECON-2002. Proceedings of the 28thAnnual Conference of the IEEE Industrial Electronics Society. New York, NY. IEEE USA vol. 1 of 4. Nov. 5, 2002. pp. 852-857, XP010633268. ISBN: 0-7803-7474-6.
Iwamoto, M.; Jayaraman, A.; Hanington, G.; Chen, P.F.; Bellora, A.; Thornton, W.; Larson, L.E..; Asbeck, P.M.; Bandpass Delta-Sigma Class-S Amplifier; Electronics Letters, vol. 36, No. 12; Jun. 12, 2000; pp. 1010-1012.
Tousi, Vahid M.; Sahandi, F.; Atarodi, M.; Shojaei, M.; A 3.3.V/1W Class D Audio Power Amplifier with 103Db DR and 90% Efficiency; IEEE, 200, pp. 581-584.
Jayaraman, Arun; Chen, P.F.; Hanington, G.; Larson, L., Asbeck, P.; Linear High-Efficiency Microwave Power Amplifiers Using Bandpass Delta-Sigma Modulators; IEEE, 1998, pp. 121-123.
Keyzer, J.; Hinrichs, J.; Metzger, M.; Iwamoto, I.; Galton, I.; Asbeck, P.; Digital Generation of RF Signals for Wireless Communications with Band-Pass Delta-Sigma Modulation; IEEE, 2001; pp. 2127-2130.
Aziz, Pervez M.; Sorensen, Henrik V.; Van Der Spiegel, Jan; An Overview of Sigma-Delta Converters; IEEE Signal Processing Magazine, Jan. 1996; pp. 61-84.
Fuller Arthur Thomas Gerald
Morris Bradley John
Smiley Russell
Choe Henry
Nortel Networks Limited
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