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.