High isolation electronic switch

Details High isolation electronic switch High isolation electronic switch

1992-03-19

1994-08-02

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307243, 307571, 307573, 328 61, H03K 1756, H03K 17687, H03K 301

Patent

active

053348818

ABSTRACT:
A high isolation electronic switch is provided for selectively switching an utput line between first and second input lines. Each input line is connected to a respective circuit that has a first current carrying path to connect the respective input line to the output line, and a second current carrying path to connect a portion of the first current carrying path of the respective circuit to a ground potential. Each respective circuit is further selectively operated to conduct along only one of its first or second current carrying paths. A unity gain buffer is connected serially in the first current carrying path of each respective circuit. The switch is selectively operated such that one circuit conducts along its first current carrying path when the other circuit is conducting along its second current carrying path. A fixed impedance is connected between the output line and ground potential to minimize effects of conducting resistance when the first or second circuits are selectively operated to conduct along their respective first current carrying path, and to minimize capacitive leakage when the first or second circuits are selectively operated to conduct along their second current carrying path. A third unity gain buffer is connected serially in the output line to isolate the fixed impedance from the effects of a load connected to the output line.

REFERENCES:
patent: 4204131 (1980-05-01), Dozier
patent: 4551634 (1985-11-01), Takahashi et al.
patent: 4733203 (1988-03-01), Ayasli
patent: 5032739 (1991-07-01), Koh
patent: 5166540 (1992-11-01), Park

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