Switching circuit

Abstract

Abstract PURPOSE:To decrease an input current, by inserting a constant voltage diode between the gate and source of a switching circuit which takes the gate and source of an FET as an input and takes the drain and source as an output. CONSTITUTION:A base and a collector of a junction transistor (TR) and a resistor R are connected in parallel with input terminals 1, 1'. The gate of the FET is connected to the emitter of the TR and the source is to the collector, and the drain and source are connected to output terminals 2, 2'. A constant voltage diode ZD is connected between the gate and source of the FET. Thus, even if a high voltage is applied to the input terminals 1, 1', the FET can be protected with the diode ZD and the resistance R can be made larger in resistance, allowing to decrease the input current.

Inventors

• 👤 Hiroyuki Miyake
• 👤 裕之 三宅
• 👤 Makoto Yasuda
• 👤 誠 安田
• 👤 Chukichi Mukai
• 👤 向井　忠吉

Bibliographic Details