Radio phone and method of operating a radio phone

Details Radio phone and method of operating a radio phone Radio phone and method of operating a radio phone

1994-04-18

1996-09-10

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455127, H04B 138

Patent

active

055554504

ABSTRACT:
The present invention relates to a procedure for using a radio phone (2) with an external amplifying device (1) for receiving, amplifying and transmitting a radio frequency reception signal to the radio phone, in which radio phone a reception frequency signal is supplied to a front end amplifier (9). When the external amplifying device (1) is connected to the radio phone, the front end amplifier (9) of the radio phone is bypassed or the gain thereof (9) is adjusted to be lower. The control signal (OHJ) is preferably a voltage control signal of direct voltage frequency or low frequency produced in the amplifying device (1), which in the amplifying device is added into the reception signal, and in the radio phone separated from the reception signal into a control :signal of the front end amplifier.

REFERENCES:
patent: 3980964 (1976-09-01), Grodinsky
patent: 4636741 (1987-01-01), Mitzlaff
patent: 4949016 (1990-08-01), De Bijl et al.
patent: 5095541 (1992-03-01), Aisaka et al.
patent: 5101507 (1992-03-01), Jung
patent: 5142695 (1992-08-01), Roberts et al.
patent: 5146614 (1992-09-01), Furuno
patent: 5193219 (1993-03-01), Tamura
patent: 5259018 (1993-11-01), Grimmett et al.
patent: 5303395 (1994-04-01), Dayani
patent: 5436550 (1995-07-01), Arakawa
Finnish Office Action dated 26 Nov. 1993 on priority Finnish Application 931872 and English translation thereof.

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