Amplifiers – With semiconductor amplifying device – Including protection means
Reexamination Certificate
2007-04-17
2007-04-17
Mottola, Steven J. (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including protection means
Reexamination Certificate
active
11018317
ABSTRACT:
A directional coupler is provided on the output side of a power amplifier. An increase in reflected wave power from a load is detected through the directional coupler by an electric power detector (wave detector). Then, a detection signal of an electric power detector is provided to a power amplifier supply voltage control circuit. As a result, the supply voltage supplied to the power amplifier is reduced gradually. By virtue of this, the supply voltage provided to the power amplifier is gradually reduced when the power amplifier approaches a breakdown condition. This protects the power amplifier.
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Scuderi et al., “A High Performance RF Power Amplifier with Protection against Load Mismatches” XP010645004, Institute of Electrical and Electronics Engineers, 2003 IEEE MTT-S International Microwave Symposium Digest (IMS 2003), IEEE MTT-S International Microwave Symposium, IEEE, New York, NY, pp. 699-702, Jun. 8, 2003.
Matsushita Electric - Industrial Co., Ltd.
Mottola Steven J.
Stevens Davis Miller & Mosher LLP
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