High-frequency switching circuit

Details High-frequency switching circuit High-frequency switching circuit

1997-10-23

1999-06-22

Paladini, Albert W.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

343741, 333132, 333262, 327113, 4551991, H03G 1104

Patent

active

059145447

ABSTRACT:
The present invention relates to a high-frequency switching circuit, and provides a high-frequency switching circuit capable of withstanding high output power, achieving highly efficient isolation, and reducing an insertion loss using inexpensive pin diodes. A switching control voltage or ground voltage developed at one power supply is applied to a control terminal. A diode resonant circuit includes a diode that applies a signal to an output terminal through an anode thereof and a signal to an input terminal through a cathode thereof, and has a resonant circuit, which attains a parallel resonance owing to a parasitic capacitance formed when the diode is off in the frequency band of the high-frequency signal, interposed between the anode and cathode of the diode. A first bias circuit separates a switching control current stemming from the switching control voltage applied to the control terminal from the high-frequency signal and supplies the switching control current to the anode of the diode. A second bias circuit causes a switching control current supplied to the cathode of the diode and separated from the high-frequency signal to flow to ground.

REFERENCES:
patent: 4417153 (1983-11-01), Onodera et al.
patent: 4443844 (1984-04-01), Grace
patent: 5300900 (1994-04-01), Bellantoni
patent: 5634200 (1997-05-01), Kitakubo et al.

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