APPARATUS AND METHODS FOR RADIO FREQUENCY SWITCHING

摘要

Provided herein are apparatus and methods for radio frequency (RF) switching. In certain configurations, an RF switching circuit includes two or more FETs electrically connected in series between an input terminal and an output terminal, with the two or more FETs in the series connected via one or more intermediate nodes. The RF switching circuit receives a first switch control signal that can be used to control the DC bias voltages of the gates of the two or more FETs, and a second switch control signal that can be used to control the DC bias voltages of the one or more intermediate nodes.

主权项

1. A radio frequency (RF) system comprising:
a first RF switching circuit comprising:
a first terminal;a second terminal;a first control terminal configured to receive a first control signal;a second control terminal configured to receive a second control signal; andtwo of more field-effect transistors (FETs) electrically connected in series between the first terminal and the second terminal, wherein the two or more FETs comprise a first FET including a source/drain electrically connected to the first terminal and a second FET including a source/drain electrically connected to the second terminal, wherein a first intermediate node is disposed along a signal path between a drain/source of the first FET and a drain/source of the second FET,wherein the first control signal is configured to control a DC bias voltage of a gate of the first FET and a DC bias voltage of a gate of the second FET, and wherein the second control signal is configured to control a DC bias voltage of the first intermediate node.