RF branch with improved power handling

  • US 10,454,529 B2
  • Filed: 01/09/2017
  • Issued: 10/22/2019
  • Est. Priority Date: 01/08/2016
  • Status: Active Grant
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First Claim
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1. A radio frequency (RF) switch, comprising:

  • one or more stages, each stage comprising;

    a signal input terminal;

    a signal output terminal;

    a control input terminal;

    a switching device having a source terminal connected to the signal input terminal, a drain terminal connected to the signal output terminal, a gate terminal for controlling an on/off state of the switching device, and a body terminal;

    a gate resistor connected in series between the control input terminal and the gate terminal, wherein the gate resistor of each stage forms part of a gate bias network; and

    a rectification circuit for rectifying a voltage across the source and drain terminals to provide a local bias voltage to the body terminal, wherein the rectification circuit comprises;

    a first capacitor connected between the source terminal and a first intermediate node;

    a first diode having an anode connected to the first intermediate node and a cathode connected to the drain terminal;

    a second capacitor connected between the drain terminal and a second intermediate node; and

    a second diode having an anode connected to the second intermediate node and a cathode connected to the source terminal.

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