Transmission power control apparatus

Details Transmission power control apparatus Transmission power control apparatus

1996-10-10

1998-09-15

Vo, Nguyen

Telecommunications

Transmitter

Plural separate transmitters or channels

455 32, 455430, 455 121, 455126, 455127, H04B 104

Patent

active

058094202

ABSTRACT:
A transmission power control apparatus in a communication apparatus which synthesizes IF signals output from a plurality of channel units and emits the synthesized signal from an antenna. In the transmission power control apparatus, when none of channel units transmit an IF signal, a controller changes the connection of a power amplifier from the antenna over to a dummy antenna and supplies the output of the power amplifier to the dummy antenna, and instructs a predetermined number m of channel units to output IF signals, a reference voltage generator generates a reference voltage corresponding to a transmission wave number m, and a variable attenuator or a variable amplifier controls gain so that the difference between detected voltage corresponding to a transmission power and the reference voltage becomes zero.

REFERENCES:
patent: 3737782 (1973-06-01), Pierce
patent: 4491973 (1985-01-01), Idol
patent: 5530920 (1996-06-01), Takeda
patent: 5574992 (1996-11-01), Cygan et al.
patent: 5659892 (1997-08-01), Soleimani et al.

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