| 摘要 |
The circuit includes a supply providing to 40 volts (10) with a protective circuit on series with the integrated circuit (12). A resistance (14) is connected in series with a transistor (20), with the connection between the resistor and the collector of the transistor being connected to the base of one transistor (16) of a Darlington pair (16,18). - When the voltage drop across the resistance approaches the conduction threshold of the series transistor, the amplifying pair of transistors act to reduce the voltage across the resistance (24) across which the integrated circuit is connected.
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