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RADIO-FREQUENCY SWITCH CIRCUIT

  • US 20100073066A1
  • Filed: 07/09/2009
  • Published: 03/25/2010
  • Est. Priority Date: 09/25/2008
  • Status: Active Grant
First Claim
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1. A radio-frequency switch circuit comprising:

  • an antenna terminal;

    two or more radio-frequency terminals;

    n-stage through FETs (field effect transistors) connected in series between the antenna terminal and each of the radio-frequency terminals, where n is a natural number;

    a radio-frequency leakage prevention resistor connected to a gate of the through FETs;

    a control signal line commonly connected to the gates of the n-stage through FETs connected to the same radio-frequency terminal; and

    a resistor connected to each of at least two of the control signal lines and connected to the radio-frequency leakage prevention resistor in series,the two control signal lines being capacitively coupled between the resistor and the through FETs.

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