Peak shut-off electronic switch

Details Peak shut-off electronic switch Peak shut-off electronic switch

H - Electricity

03

K

379/15, 328/194

H03K 17/68 (2006.01) H03K 17/725 (2006.01) H04M 3/02 (2006.01) H04M 19/04 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 1076278

R.L. Carbrey 53 PEAK SHUT-OFF ELECTRONIC SWITCH Abstract of the Disclosure A control transistor and a pnpn device are arranged in serial combination with each other, as well as with a source of alternating current and a load. The transistor and pnpn device in combination behave as a two-state semiconductor switch for switching cylically varying currents and voltages of amplitude greater than the punch- through voltage limit of the transistor. The switch conducts and unrectified, cyclically varying waveform by operating of diode biasing scheme. Circuitry responsive to voltage peaks of the source causes the transistor to periodically open the circuit for a short duration, thereby discontinuing the transmission of energy to the load within a fraction of a cycle after a discontinuation command signal is revived. - 1 -

273488

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