Switching circuit having constant impedance regardless switching

Details Switching circuit having constant impedance regardless switching Switching circuit having constant impedance regardless switching

1991-05-30

1992-10-27

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

307571, 333262, H01P 115

Patent

active

051592975

ABSTRACT:
A switching circuit comprises a transmission line having a specific impedance value and connected to an input terminal, a first switching portion including a plurality of first transistors connected in parallel between the transmission line and the ground, and a second switching portion including a second transistor and a resistor connected in parallel between the transmission line and an output terminal. The first transistors of the first switching portion and the second transistor of the second switching portion are complementally switched. Consequently, the switching circuit can be enabled to impedance-match with an objective circuit (for example, a measurement apparatus, a transceiver, a phased array system, and the like), and loss of signal transfer can be decreased regardless of the switching ON or OFF states of the switching circuit.

REFERENCES:
patent: 4939485 (1990-07-01), Eisenberg
patent: 5061911 (1991-10-01), Weidman et al.

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