| 摘要 |
The radiotelephone of a time-divided radiotelephone system, i.e. TDMA, has a first mode and a second mode, whereby in the first mode the transmitter (TX) is active and in the second mode the receiver (RX) is active. When the transmitter is on, the TX signal dependent on it controls switching means (V2) in such a way that in the first mode blocking is accomplished of at least one active signal path that is in the other mode. In this way the isolation between the transmitter and the receiver is improved. The switching means can comprise, for example, a transistor (V2), by means of which the collector of the transistor (V1) of the RX amplifier is connected substantially to the earth potential. <IMAGE> |
