Antenna switching circuit for mobile telephone has antenna input and control line of switching module coupled to respective electrostatic discharge protection devices

摘要

The circuit has an antenna input (1), a signal input (2) and a signal output (3) and a switching module (4) with a control line (5), selectively connecting the antenna input with the signal input or the signal output. The antenna input and the control line are coupled to respective electrostatic discharge protection devices (6,7), a Zener diode used as the protection device for the control line. An Independent claim for a switch module is also included.