| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an insulated gate bipolar transistor operated by a photoelectric conversion element for ensuring a normal operation of this transistor with a low-voltage signal source. SOLUTION: This transistor is provided with a light-emitting element L101 connected to an a-c or d-c power source for converting a low-voltage signal into optical energy and photoelectric conversion element PE101 for converting the optical energy into electrical energy for generating a high-voltage weak- current signal against that element L101, the conversion element PE101 being connected parallel to the gate and emitter of the insulated gate bipolar transistor.</p> |
