Procedure for forming low power levels in a radio telephone tran

Details Procedure for forming low power levels in a radio telephone tran Procedure for forming low power levels in a radio telephone tran

1990-04-30

1992-09-29

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

With control signal

455127, 330284, H04B 104

Patent

active

051520044

ABSTRACT:
A circuit for forming low power levels in a radio telephone transmitter in which high power levels are produced in a controllable amplifier stage (1), for instance in a class-C power amplifier. According to the procedure, a RF signal is before the amplifier stage (1) divided into two branches in a power divider (4), in one of which the Rf signal is conducted to said amplifier stage (1) for forming high power levels, and in the other branch the RF signal is conducted to an element (5) by which low power levels are produced, and said branches are combined in the output (RFout) of the transmitter. The element (5) may be a PIN diode attenuator.

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JP-A-60 019310 (Nippon Denki) dated Jan. 31, 1985, Patent Abstract of Japan, vol. 9, No. 136 (E320)(1859), Jun. 12, 1985, 1 page.

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