Radio-frequency switch system having improved intermodulation distortion performance

摘要

Radio-frequency (RF) switch circuits are disclosed providing improved switching performance. An RF switch system includes a switch having a stack of field-effect transistors (FETs) connected in series between first and second nodes. A capacitor connected in series with the switch is configured to inhibit a low-frequency blocker signal from mixing with a fundamental-frequency signal in the switch.

主权项

1. A radio-frequency (RF) switch system comprising:
a first switch circuit connected between an antenna node and a transmit node; a second switch circuit connected between the antenna node and a receive node; a first capacitor connected in series with the first switch circuit between the first switch circuit and the antenna node; a second capacitor connected in series with the second switch circuit between the second switch circuit and the antenna node; a first shunt arm connected to the first switch circuit and the transmit node, the first shunt arm including a third switch circuit connected to ground; and a second shunt arm connected to the second switch circuit and the receive node, the second shunt arm including a fourth switch circuit connected to ground.