Telecommunications – Transmitter and receiver at separate stations – With control signal
Patent
1992-12-28
1994-05-17
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
With control signal
455126, 455127, H04B 104
Patent
active
053136586
ABSTRACT:
A transmission power control system for use in a radio includes a transmission unit having a first variable attenuator for adjusting an intermediate frequency signal level, a converter for converting the output of the first variable attenuator to a higher frequency band signal, a second variable attenuator for adjusting the output level of the converter, and a high output amplifier for amplifying the output of the second variable attenuator to provide an amplified signal to a transmission antenna. The transmission unit also includes a first transmission power controller for controlling transmission power based on the degree of attenuation of the first variable attenuator, and a second transmission power controller for controlling the transmission power based on the degree of attenuation of the second variable attenuator. The first transmission power controller or the second transmission power controller is activated by a switch based on the range of a receiving level data signal.
REFERENCES:
patent: 3745464 (1073-07-01), Lee
patent: 4004224 (1977-01-01), Arens et al.
patent: 4553105 (1985-11-01), Sasaki
Eisenzopf Reinhard J.
Fujitsu Limited
Pham Chi
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