| 摘要 |
Compensating circuit for voltage and temperature in a transistor circuit of complementary connection having an NPN type transistor and a PNP type transistor with its base connected to the collector of the NPN transistor. The voltage of the base of the NPN transistor is compared with the voltage of the emitter thereof so as to trigger the same so that the PNP transistor is triggered. The circuit comprises a first voltage dividing series circuit and a second voltage dividing series circuit. The first voltage dividing series circuit consists of a varistor diode and a resistor. The first series circuit is connected to the terminals of the electric source, so that the divided voltage of the varistor diode is applied to the emitter of the NPN transistor. The second voltage dividing series circuit consists of a varistor diode and a resistor. The second series circuit is connected to the terminals of the varistor diode of the first series circuit so that the divided voltage of the varistor diode of the second series circuit is applied between the base and the emitter of the NPN transistor. The variation in the voltage of the varistor diode in each of the first and the second series circuit due to the variation in the voltage of the electric source as well as the variation in the temperature is made small thereby permitting the NPN transistor to be stabilized. |
