Radio communication apparatus comprising a single level controll

Details Radio communication apparatus comprising a single level controll Radio communication apparatus comprising a single level controll

1990-04-20

1993-04-06

Eisenzopf, Reinhard J.

Telecommunications

Transmitter

4552341, 4552461, H04B 102, H04B 700

Patent

active

052010708

ABSTRACT:
A radio communication apparatus includes a transmitting portion supplied with input baseband signals for selectively transmitting the input baseband signals in response to a selection signal. The transmitting portion includes a selector for selecting one of the input baseband signals as a selected baseband signal in response to the selection signal. A level controller has a controllable gain and controls the selected baseband signal so that the selected baseband signal has a level which is determined by the controllable gain. A gain controller has predetermined gains in correspondence to the input baseband signals and controls the controllable gain in response to the selection signal so that the controllable gain becomes equal to one of the predetermined gains that corresponds to the selected baseband signal. A converter converts the selected baseband signal into a radio signal carrying the selected baseband signal. The gain controller may have a memory for memorizing the predetermined gains. Responsive to the selection signal, a reading circuit reads from the memory, as a read-out gain, one of the predetermined gains that corresponds to the selected baseband signal. A control circuit controls the controllable gain so that the controllable gain becomes equal to the read-out gain.

REFERENCES:
patent: 4194154 (1980-03-01), Kahn
patent: 4271503 (1981-06-01), Eumurian et al.
patent: 4870699 (1989-09-01), Garner et al.

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