Radio frequency signal power amplifier combining network

Details Radio frequency signal power amplifier combining network Radio frequency signal power amplifier combining network

1994-03-10

1995-08-01

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455 93, 455127, 330124R, 330295, 375216, H04B 104

Patent

active

054386845

ABSTRACT:
A dual-mode RF signal power amplifier combining network is comprised of two branches, each having a power amplifier (200 and 201). The first branch contains a non-linear mode power amplifier (200) while the second branch contains a linear mode power amplifier (201). The non-linear mode branch also has an RF switch (210). Both branches are coupled to a common output node (220). The common node (220) is coupled to a filter (107) before going to an antenna (106). The non-linear mode power amplifier (200) operates when an FM signal is to be amplified, while the linear amplifier (201) is biased in an off state. The linear mode power amplifier (201) operates when a digital signal is to be amplified, while the non-linear amplifier (200) is biased in an off state. The RF switch (210) removes the non-linear amplifier (200) from the circuit to prevent loading the on state linear amplifier (201).

REFERENCES:
patent: 4959873 (1990-09-01), Flynn
patent: 5008631 (1991-04-01), Scherer et al.
patent: 5060294 (1991-10-01), Schwent
patent: 5175871 (1992-12-01), Kunkel
patent: 5179353 (1993-01-01), Miyake

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