| 摘要 |
<p>A RF signal switch circuit device in particular for cellular communication applications, comprises an I/O terminal (8) for the received/transmitted signal, respectively, a Tx input terminal (10) connected to I/O terminal (8) through a diode (12) and to a signal source for the signal to be transmitted, a Rx output terminal (18) connected to the I/O terminal (8), and a resonator circuit for isolating the Tx input terminal (10) from the Rx output terminal (18). The resonator circuit is a parallel inductance-capacitance-circuit. The inductor (22) of the resonator circuit is connected between the Tx input terminal (10) and the Rx output terminal (18) and through a diode to ground (24), and the capacitor (20) of the resonator circuit is connected between the I/O terminal (8) and a node (28) between the inductor (22) and ground.</p> |
