Light-triggered switching circuit

Details Light-triggered switching circuit Light-triggered switching circuit

1991-08-07

1992-09-15

Hille, Rolf

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

357 30, 357 41, 307570, 307630, H01L 2974, H01L 2714, H03K 17292, H03K 1760

Patent

active

051482533

ABSTRACT:
A light-triggered switching circuit which comprises a PNPN element, a resistor, and control means. The PNPN element is made of a P-type emitter layer, an N-type base layer, a P-type base layer, and an N-type emitter layer. The resistor is connected between the P-type base layer and the N-type emitter layer. The control means is connected between the P-type emitter layer and the N-type emitter layer. It controls the PNPN element such that the PNPN element performs a switching operation only when a voltage applied between the P-type emitter layer and the N-type emitter layer is lower than a predetermined value while a first amount of light is being applied to the PNPN element, and is also performs a switching operation, regardless of the value of the voltage applied between the P-type emitter layer and the N-type emitter layer, while a second amount of light, different from the first amount of light, is being applied to the PNPN element.

REFERENCES:
patent: 4039863 (1977-08-01), Ohhinata et al.
patent: 4212024 (1980-07-01), Sugawara et al.
patent: 4224634 (1980-09-01), Suedberg
patent: 4365170 (1982-12-01), Okuhara
patent: 4509069 (1985-04-01), Stoisiek
Patent Abstracts of Japan vol. 3, No. 58 (E-111) May 18, 1979, JP A-5437461 published Mar. 19, 1979 to (Hitachi Seisakusho K.K.).

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