Amplifiers – With control of power supply or bias voltage – With control of input electrode or gain control electrode bias
Patent
1999-05-18
2000-05-02
Pascal, Robert
Amplifiers
With control of power supply or bias voltage
With control of input electrode or gain control electrode bias
330278, 330279, H03G 320, H03G 310
Patent
active
060577320
ABSTRACT:
A method of controlling a transmission power in a CDMA system in which an AGC (automatic gain control) amplifier that amplifies a transmission signal, and an RF power amplifier that amplifies an output of said AGC amplifier are disposed, and a gain of said AGC amplifier is controlled by a transmission power control signal to control a transmission power, wherein first comparing means for comparing-the transmission power control signal with a predetermined reference value, and second comparing means for detecting the transmission power, and for comparing the detected transmission power with a predetermined reference value are disposed, and when only said first comparing means outputs an output signal, a signal in a direction along which the transmission power is increased is produced, and, when only said second comparing means outputs an output signal, a signal in a direction along which the transmission power is decreased is produced and the signal is added as an offset signal to the transmission power control signal, and, when both said first and second comparing means output an output signal or when both said first and second comparing means do not output an output signal, a present offset signal is held.
REFERENCES:
patent: 5469115 (1995-11-01), Peterzell et al.
patent: 5525922 (1996-06-01), Masarik et al.
patent: 5548616 (1996-08-01), Mucke et al.
patent: 5606285 (1997-02-01), Wang et al.
Kyocera Corporation
Nguyen Patricia T.
Pascal Robert
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