RF branch with accelerated turn-on and high Q value

  • US 10,447,344 B2
  • Filed: 01/09/2017
  • Issued: 10/15/2019
  • 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 first terminal connected to the signal input terminal, a second terminal connected to the signal output terminal, and a third terminal for controlling an on/off state of the switching device;

    a first resistor connected in series between the control input terminal and the third terminal;

    a first bypass switch for connecting each end of the first resistor to bypass the first resistor when the first bypass switch is closed;

    a second resistor connected in series between the signal input terminal and the signal output terminal; and

    a second bypass switch for connecting each end of the second resistor to bypass the second resistor when the second bypass switch is closed;

    wherein the first bypass switch and the second bypass switch are configured to close concurrently to collectively reduce a respective time constant set by the first resistor and the second resistor;

    the one or more first resistors forming a first bias network and the one or more second resistors forming a second bias network.

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