Monolithic zero crossing triac driver

Details Monolithic zero crossing triac driver Monolithic zero crossing triac driver

1983-08-22

1985-11-12

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307252B, 307252T, 307252UA, 307311, H03K 1772

Patent

active

045530416

ABSTRACT:
A monolithic, light-activated zero-crossing triac driver is provided that includes back-to-back thyristors, whose gates are shunted by both a resistor to reduce the overall sensitivity and a first field effect transistor. A second field effect transistor shunts the gate of the first field effect transistor. A photovoltaic diode is coupled between the base of the thyristor and the gates of the first and second field effect transistors and serves as a current source to charge the gate capacitance of the first field effect transistor.

REFERENCES:
patent: 3777188 (1973-12-01), Mazur
patent: 4015143 (1977-03-01), Tokunaga et al.
patent: 4063115 (1977-12-01), Okuhara et al.
patent: 4084110 (1978-04-01), Okuhara et al.
patent: 4224634 (1980-09-01), Svedberg
patent: 4295058 (1981-10-01), Lade et al.
patent: 4322637 (1982-03-01), Takasago
patent: 4396932 (1983-08-01), Alonas et al.

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