Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Patent
1997-02-13
1999-06-08
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
455 82, 455 84, H04B 144
Patent
active
059111160
ABSTRACT:
A transmitting-receiving switch-over circuit arrangement for a transceiver includes a transmitter terminal (TX) and a receiver terminal (RX) connected by respective transmitting and receiving circuit sections to a circuit junction point (P) that is coupled to an antenna terminal (ANT). A controllable semiconductor switch (D1, D4, D6) is connected to the transmitting circuit section. A further controllable semiconductor switch (D2, D3, D5, D7) is connected to the receiving circuit section. Control signals are applied to the semiconductor switches so that at least the semiconductor switch connected to the receiving circuit section is controllable independently to assume any one of three stages, namely: fully passing the received RF-signal, fully blocking the received RF-signal, and attenuating the received RF-signal.
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LMX-PR-014, muRata, Multilayer Component Dept., New Business Development Division, Jun. 1994.
Bhattacharya Sam
Eisenzopf Reinhard J.
Fasse W. F.
Fasse W. G.
TEMIC Telefunken microelectronic GmbH
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