Radio communication apparatus in which output power is controlle

Telecommunications – Transmitter and receiver at separate stations – With control signal

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Details

455 92, 455126, 455127, 330279, 330297, H04B 7005, H04Q 732

Patent

active

056049242

ABSTRACT:
A radio communication apparatus capable of varying the level of its transmission output, includes a receiving circuit, a transmitting circuit, an amplifier, an extractor, a detector, a variable voltage converter and a control circuit. The receiving circuit receives a signal from a second station such as a base station, and the transmitting circuit transmits a signal to the second station. The amplifier amplifies the output signal obtained from the transmitter, and the extractor extracts data from the output signal of the receiving circuit so as to control the level of the transmission output. The detector detects the level of the transmission output obtained from the amplifier, and the variable voltage converter converts a source voltage into the operating voltage of the amplifier. The control circuit produces a control signal to control the magnitude of the operating voltage supplied from the variable voltage converter to the amplifier in response to both the detection signal from the detector and the output signal from the extractor, and supplies the produced control signal to the variable voltage converter. The transmission output obtained from the amplifier is varied by changing the operating voltage supplied from the variable voltage converter to the amplifier.

REFERENCES:
patent: 4654882 (1987-03-01), Ikeda
patent: 5065450 (1991-11-01), Wu et al.
patent: 5101175 (1992-03-01), Vaisanen
patent: 5101507 (1992-03-01), Jung
patent: 5126688 (1992-06-01), Nakanishi et al.
patent: 5182527 (1993-01-01), Nakanishi et al.
patent: 5193219 (1993-03-01), Tamura
patent: 5307512 (1994-04-01), Mitzlaff
patent: 5446920 (1995-08-01), Matsumoto et al.
UK Patent Application GB 2 199 467 A, Jul. 6, 1988 (Katsuyama).

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