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A highly reliable constant current source circuit with the function of suppressing the high voltage at the moment of turning on

A technology of constant current source and high voltage, which is applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device, etc. for limiting overcurrent/overvoltage, and can solve the problem that the equipment under test cannot be tested for safety of the equipment under test, etc. problems, to achieve high temperature stability, large DC amplification factor, and ensure the effect of stability

Active Publication Date: 2016-06-01
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST +1
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Problems solved by technology

However, none of the constant current sources used in the above literature can avoid the impact of the instantaneous high voltage generated by the constant current source on the device under test at the moment of switching on, and the test and guarantee of the device under test cannot be realized in the case of a circuit failure. Safety of the device under test

Method used

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  • A highly reliable constant current source circuit with the function of suppressing the high voltage at the moment of turning on
  • A highly reliable constant current source circuit with the function of suppressing the high voltage at the moment of turning on
  • A highly reliable constant current source circuit with the function of suppressing the high voltage at the moment of turning on

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Embodiment

[0043] Such as figure 1 and figure 2 As shown, a highly reliable constant current source circuit with the function of suppressing high voltage at the moment of turning on includes a constant current source power supply circuit 1, a voltage stabilizing circuit 2, a constant current source current setting circuit 3, a path protection circuit 4, and a constant current source Constant current source current locking circuit, constant current source voltage suppression circuit 6 and anti-backflow circuit 7;

[0044] In the circuit of the present invention, the constant current source power supply circuit 1 provides voltage input for the constant current source circuit, and the voltage generated by the constant current source power supply circuit 1 is locked by the voltage stabilizing circuit 2 to generate a stable voltage, and the stable voltage is set by the constant current source current. The constant circuit 3 is converted into a constant current I, and the constant current I ...

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Abstract

The invention relates to a high-reliability constant current source circuit with an instant high voltage connection restraining function, and belongs to the technical field of detection of channels, measurement of charging circuits and devices and the like. The constant current source circuit can effectively restrain instant high voltage produced when the constant current source circuit is powered on so as to protect a tested device, current set resistors are connected in series and parallel through the constant current source circuit, and therefore the reliability of the constant current source circuit is enhanced, the constant current source circuit can still be kept within the safety current range under a certain failure condition by reasonably selecting set resistance values, and the damage to a power consumption device is avoided.

Description

technical field [0001] The invention relates to a novel high-reliability constant current source circuit with the function of suppressing high voltage at the moment of connection, and belongs to the technical fields of path detection, charging circuit, device measurement and the like. Background technique [0002] Constant current source circuits are widely used in the fields of path detection, charging circuits, and device measurement. Document 1 "Constant Current Sources and Their Application Circuits" (edited by Chen Kailiang and Zhu Shusheng, published by Zhejiang Science and Technology Press, 1992) discusses various types of The constant current source circuit is introduced, among which the transistor constant current source circuit is one of them, which is composed of transistors, Zener tubes, resistors, etc., has a simple structure and is widely used. Document 2 "Constant Current Source Circuit for GPS Equipment" (Chinese Patent Application No.: 2012207283510) and Doc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56H02H9/02H02H9/04
Inventor 吕章刚司文杰梁海波李浩梁婕刘志华许昊
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
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