Transmitting-receiving switch-over device complete with semiconductors
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United States of America Patent
Stats
-
Jun 8, 1999
Grant Date -
N/A
app pub date -
Feb 13, 1997
filing date -
Mar 19, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
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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