Electrical transmission or interconnection systems – With nonswitching means responsive to external nonelectrical... – Temperature responsive
Patent
1990-10-01
1992-05-19
Zazworsky, John
Electrical transmission or interconnection systems
With nonswitching means responsive to external nonelectrical...
Temperature responsive
307640, 323241, 323268, H03K 17296, H03K 1772, H03K 1794
Patent
active
051151561
ABSTRACT:
An apparatus for triggering a plurality of thyristor devices includes a full-wave rectifier circuit having a sinusoidal pulse output, a Schmitt trigger circuit to generate a constant amplitude pulse signal when the sinusoidal pulse output exceeds a certain triggering level, a clock pulse generator to generate a predetermined number of clock pulses within the duration of the constant amplitude pulse signal, and an address counter to receive the generated clock pulses. The address counter has a digital output corresponding to the number of clock pulses received. A read-only memory unit has digital data stored therein. The memory unit has a plurality of address lines to receive the digital output of the address counter and a set of output data bits corresponding to the stored digital data which is accessed according to the digital output of the address counter. Each thyristor device is triggered into the conducting state by one of the output data bits of the memory unit.
REFERENCES:
patent: 3305844 (1967-02-01), Yadav et al.
patent: 4347562 (1982-08-01), Galloway
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