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Radio frequency switching circuit and electronic device

  • US 9,231,780 B2
  • Filed: 08/18/2014
  • Issued: 01/05/2016
  • Est. Priority Date: 01/28/2014
  • Status: Active Grant
First Claim
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1. A radio frequency (RF) switching circuit comprising:

  • a first switching circuit unit connected between a first signal port for signal transmission and reception and a common connection node connected to an antenna port and operated according to a first gate signal;

    a second switching circuit unit connected between a second signal port for signal transmission and reception and the common connection node and operated according to a second gate signal;

    a negative voltage generating unit generating a negative voltage using a voltage of an RF signal from the common connection node; and

    a gate signal generating unit generating the first and second gate signals using the negative voltage from the negative voltage generating unit and an operating voltage according to a switching control signal, and a control unit generating a switching control signal according to a system operation control signal.

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