Cathode gate triggering method and system for speech path switch

Details Cathode gate triggering method and system for speech path switch Cathode gate triggering method and system for speech path switch

1975-12-16

1977-05-24

Robinson, Thomas A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340166R, H04Q 352

Patent

active

040257266

ABSTRACT:
A cathode gate triggering method and system for speech path channel switches using m .times. n PNPN switches as switching elements, in which l .times. n PNPN switches in each switch array connected in common at the anode thereof are connected in multiple at the control gate thereof to substantially a single control gate common line through respective diodes, and a single constant-current regulated power supply capable of switching the output current thereof by being controlled by an external control source is connected to this control gate common line for supplying constant current to the control gate of each of the PNPN switches, so that uniform gate current can be supplied to each of the multiple connection stages, and each of the PNPN switches can be triggered in a stable and reliable manner.

REFERENCES:
patent: 3688051 (1972-08-01), Aagaard
patent: 3786425 (1974-01-01), Hetherington et al.
patent: 3864530 (1975-02-01), Hestad

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