Constant current double buffer trigger-type driving power supply for power system fault detecting device
A fault detection and power system technology, applied in control/regulation systems, output power conversion devices, electrical components, etc., can solve problems such as power supply electromagnetic interference, working current cannot maintain a constant value, etc., to avoid current fluctuations and reduce production costs and maintenance cost reduction, the effect of a wide range of use
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[0019] Such as figure 1 As shown, the present invention consists of a diode rectifier U, a nonlinear trigger circuit connected with the diode rectifier U, a double-buffered quartz crystal oscillator circuit connected with the nonlinear trigger circuit, and a series connection between the diode rectifier U and the nonlinear trigger circuit Between the power logic regulator circuit. In order to achieve the effect of the present invention, a constant current circuit is connected in series between the power logic voltage stabilizing circuit and the nonlinear trigger circuit in the present invention.
[0020] Among them, the constant current circuit such as figure 2 As shown, it includes operational amplifier P2, operational amplifier P3, field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, triode Q3, and triode Q4.
[0021] In order to achieve the expected effect, the constant current circuit also includes a resistor R12 with one end connect...
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