Amplifiers – With semiconductor amplifying device – Including class d amplifier
Reexamination Certificate
2007-07-05
2011-10-18
Nguyen, Hieu (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including class d amplifier
C330S306000
Reexamination Certificate
active
08040185
ABSTRACT:
The present invention concerns an amplifying device arranged to receive an input signal having a certain duty cycle. The amplifying device comprise a first switching unit having an input terminal adapted to receive a first half of the input signal, and an output terminal adapted to be connected to a first signal output where a first half of an output signal is provided. The amplifying device comprise a second switching unit having an input terminal adapted to receive a second half of the input signal and an output terminal adapted to be connected to a second signal output where a second half of the output signal is provided. Also, the first switching unit and the second switching units are adapted to receive an input signal, wherein the first half of said input signal has the same duty cycle as the second half of the input signal but shifted in phase. The present invention also concerns a wireless transceiver and a radio transmission device.
REFERENCES:
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patent: 7170132 (1995-07-01), None
Long, A., “High Frequency Current Mode Class-D Amplifiers With High Output Power and Efficiency”, Dept. of Electrical and Computer Engineering, University of California, Santa Barbara, May 2003, Retrieved from the Internet: http://www.ece.ucsb.edu/rad.pubs/master/along—2003.pdf>, 50 pages.
Hung, T-P et al., “Design of High-Efficiency Current-Mode Class-D Amplifiers for Wireless Handsets”, IEEE Transactions on Microwave Theory and Techniques, vol. 53, Jan. 1, 2005, XP11125360A, pp. 144-150.
Hung, T-P et al., “High Efficiency Current-Mode Class-D Amplifier with Integrated Resonator” XP10728155A, Microwave Symposium Digest, 2004 IEEE MTT-S International, Fort Worth, TX, USA, Jun. 6, 2004, Conference Proceedings Article, pp. 2035-2038.
Long, A., et al., “A 13W Current Mode Class D High Efficiency 1 GHz Power Amplifier”, XP010635142A, Midwest Symposium on Circuits and Systems, New York, NY, IEEE, US, Aug. 4, 2002, 7731156 INSPEC, vol. 1 of 3, Conference proceedings, 4 pages.
Official Action issued on Jul. 7, 2011 in corresponding European Patent Application No. 07 769 043.6, 4 pages.
Nguyen Hieu
Rothwell Figg Ernst & Manbeck P.C.
Telefonaktiebolaget L M Ericsson (publ)
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