| 摘要 |
<p>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.</p> |
