| 摘要 |
992,661. Transistor switching circuits. BROWN BOVERI & CO. Ltd. Feb. 7, 1962 [Feb. 9, 1961], No. 4767/62. Heading H3T. A transistor switching circuit operated from a supply having a voltage greater than the maximum safe value for the transistor is protected from damage by connecting a 4-layer diode 2 in series with the transistor and shunting the transistor by a resistor 6 such that the current flow is less than the diode breakdown current, whereby the voltage drop across the diode reduces the transistor voltage to a safe value. When the transistor is rendered conductive the diode breaks down and the full voltage is applied to the relay or other load 3. |
