Antenna switching circuit for mobile telephone has antenna input coupled to electrostatic discharge protection device provided by bandpass filter

摘要

The circuit has an antenna input (1), a signal input (2) and a signal output (3) and a switching module (4), selectively connecting the antenna input with the signal input or the signal output. The antenna input is coupled to an electrostatic discharge protection device (6), provided by a bandpass filter in a T configuration with 2 series inductor and capacitor circuits (114,115) and a parallel inductor and capacitor circuit (116). An Independent claim for a switch module is also included.