Current switching circuit

Details Current switching circuit Current switching circuit

1993-01-29

1994-02-08

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307254, 307495, 307446, 307573, 307270, H03F 304, H03F 3193

Patent

active

052851214

ABSTRACT:
A current switching circuit includes a constant current source, a first transistor, a first resistor, second and third transistors, a selecting means, and a second resistor. The constant current source supplies a constant current. The first transistor is connected in series with the constant current source and has a base biased by one terminal of a power supply. The first resistor is connected between the first transistor and the other terminal of the power supply. The second and third transistors have collector currents as output currents and are rendered conductive by applying an output voltage of the first transistor to bases of the second and third transistors. The selecting means selectively applies the output voltage of the first transistor to the bases of the second and third transistors. The second resistor is connected between the other terminal of the power supply and a common connection point between emitters of the first and second transistors.

REFERENCES:
patent: 4678942 (1987-07-01), Kanai et al.
patent: 4798981 (1989-01-01), Tsugaru et al.
patent: 4937480 (1990-06-01), Higuchi et al.
patent: 5063310 (1991-11-01), Shinozaki

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