Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1978-05-03
1980-07-08
Edlow, Martin H.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
357 30, 307311, 307303, 307305, H01L 2974
Patent
active
042120241
ABSTRACT:
A solid-state switching circuit employing photon coupling, which is controlled by a control signal, comprises a control portion which includes at least one light-emitting diode and a load current carrying portion which is formed on a di-electric isolated substrate. The load current carrying portion has a light-activated silicon controlled rectifier, the switching operation of which is controlled by photons emitted from the light-emitting diode. A transistor and a resistor are connected between the gate terminal and the cathode terminal of the light-activated silicon controlled rectifier in parallel to each other. Between the base and the emitter electrodes of the transistor, a photodiode is connected, and between the electrode connected to the n-base layer and the gate electrode of the light-activated silicon controlled rectifier, a diode is connected. And the photodiode is also activated by the photons emitted from the light-emitting diode.
REFERENCES:
patent: 4039863 (1977-08-01), Okhinota et al.
patent: 4084110 (1978-04-01), Okuhara et al.
Kamei Tatsuya
Sugawara Yoshitaka
Edlow Martin H.
Hitachi , Ltd.
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