Self-adaptive load circuit with output voltage regulation function

Abstract

The invention discloses a self-adaptive load circuit with an output voltage regulation function. The self-adaptive load circuit with the output voltage regulation function is characerized by comprising a power supply pickup coil L1, a signal pickup coil L2, a rectifying circuit, an operational amplifier M1 and a voltage regulation module M2, wherein the L1 picks a power supply, the power supply is fed into the input end of the M2 through the rectifying circuit, the output end of the M2 is connected with a load, the feedback end of the M2 is connected with a sampling resistor R6, an MOS (metal oxide semiconductor) tube Q2 is serially connected between the R6 and the feedback end of the M2, the MOS tube Q2 is driven by the M1, and the positive phase input end of the M1 acquires a signal picked by the L2 through a resistor R3. The self-adaptive load circuit with the output voltage regulation function has the remarkable effects that the circuit structure is simple, the application is safe and convenient, the output voltage can be regulated in a self-adaptive manner according to the load change, when the resistance value of the load is increased, the output voltage is increased accordingly, when the resistance value of the load is decreased, the output voltage is decreased accordingly, and finally, a front-end instrument and a front-end meter are maintained in a relatively-stable working state.

Description

technical field [0001] The invention relates to electronic circuit technology, in particular to an output voltage regulation self-adaptive load circuit. Background technique [0002] In the application process of industrial instrumentation, the front-end instrumentation often requires the back-end equipment to provide power input. In the prior art, the output voltage of the power supply of the back-end equipment is a rated value, while the load resistance of the front-end instruments and meters often changes to a certain extent due to different types of equipment. If the load resistance is large, the rated voltage output cannot meet the power demand of the load equipment, resulting in abnormal detection of instruments and meters. If the load resistance is too small, the larger rated voltage output will easily cause excessive residual power consumption and generate more heat, which will neither save energy nor affect the life of the device. Contents of the invention [00...

AI Technical Summary

Problems solved by technology

If the load resistance value is large, the rated voltage output cannot meet the power demand of the load equipment, resulting in abnormal instrument detection

If the load resistance is too small, the larger rated voltage output will easily cause excessive residual power consumption and generate more heat, which will neither save energy nor affect the life of the device

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