High-frequency amplifier, transmitting device and receiving device
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United States of America Patent
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May 11, 1999
Grant Date -
N/A
app pub date -
Apr 23, 1996
filing date -
Apr 27, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio frequency amplifier, for amplifying a radio frequency signal, comprises a plurality of active element groups, each comprising one or more active elements for amplifying a signal, with input terminals of said one or more active elements being combined to form a single input terminal and output terminals of said one or more active elements being combined to form a single output terminal and bias control means for controlling bias conditions of said plurality of active element groups arranged in such a manner that at low power output deterioration of the gain and distortion characteristics of the amplifier is avoided and sufficiently low power consumption can be achieved by switching the bias voltages of each of the active element groups of the high-frequency amplifier individually between an operating voltage and an off voltage.
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