Modulators – Phase modulator
Reexamination Certificate
2007-10-09
2007-10-09
Kinkead, Arnold (Department: 2817)
Modulators
Phase modulator
C332S145000
Reexamination Certificate
active
11137104
ABSTRACT:
A signal modulation device comprises a delta-sigma modulator disposed for transforming an amplitude-modulation signal in baseband into a pulse signal. It also comprises a phase modulator receiving, at its input, analogue phase-modulation signals in baseband. The pulse signal is mixed with carrier signals upstream of the phase modulator. The modulation device is designed to form an input stage of a transmitter.
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Yuanxun Wang, “A Class-S RF Amplifier Architecture with Envelope Delta-Sigma Modulation”, IEEE Radio and Wireless Conference, Aug. 11, 2002, pp. 177-180.
Arun Jayaraman et al., “Linear High-Efficiency Microwave Power Amplifiers Using Bandpass Delta-Sigma Modulators”, IEEE Microwave and Guided Letters, vol. 8, No. 3, Mar. 1998, pp. 121-123.
Poojan Wagh et al., “High-Efficiency Switched-Mode RF Power Amplifier”, 42nd Midwest Symposium on Circuits and Systems IEEE, vol. 2, No. 8, Aug. 8, 1999, pp. 1044-1047.
Belot Didier
Bercher Jean-François
Berland Corinne
Hibon Isabelle
Le Goascoz Vincent
Kinkead Arnold
STMicroelectronics SA
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