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RADIO FREQUENCY SWITCHING CIRCUIT WITH ADVANCED ISOLATION CHARACTERISTICS

  • US 20150118976A1
  • Filed: 05/19/2014
  • Published: 04/30/2015
  • Est. Priority Date: 10/28/2013
  • Status: Active Grant
First Claim
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1. A radio frequency switching circuit comprising:

  • a first switching circuit unit including first to nth (n is a natural number greater than at least

         2) transistors M1 to Mn connected in series between a first signal port for transmission and reception of signals and a common connection node connected to an antenna port and operated according to a first gate signal;

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

    a first impedance adjuster forming an alternating current (AC) ground path between a ground and a gate of the first transistor of the first switching circuit unit when the first switching circuit unit is in an off-state.

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