FILTER FUNCTION-EQUIPPED HIGH-FREQUENCY SWITHING CIRCUIT

摘要

An input terminal In is connected to two lines Ai1 (i = 1 and 2). These lines Ai1 are grounded via a capacitance Ci1. The lines Ai1 and lines Bi1 respectively constitute connected lines. One end of the lines Bi1 is connected to the anode of a diode Di1 whose cathode is grounded. The other end of the lines Bi1 is connected to a line Bi0 and a line Bi2. The other end of the line Bi0 is connected to a capacitor Ci0 whose other end is grounded and to a resistor Ri0 whose other end is connected to a voltage control terminal VCTLi. The other end of the line Bi2 is connected to the anode of a diode Di2 whose cathode is grounded. The line Bi2 and a line Ai2 constitute a connected line and one end of the line Ai2 is connected to an output terminal Out-i while the other end is grounded via a capacitance Ci2. By applying three potentials to VCTL1 and VCTL2, i.e., grounding potential, positive potential not flowing current, and positive potential flowing current, it is possible to obtain a 5.8 GHz band, a 4.8 GHz band, and cut-off for the output of the terminal Out-1, 2.