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FPGA based over-current monitoring circuit

A monitoring circuit and control circuit technology, which is applied in the direction of reliability improvement and revision, can solve the problems of inconsistent output voltage, single warning circuit for design requirements, unreasonable setting of overshoot suppression circuit, etc.

Inactive Publication Date: 2016-10-26
CHENGDU ZHIRENSHANYONG INFORMATION TECH CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above prior art, the purpose of the present invention is to provide an FPGA-based overcurrent monitoring circuit, which aims to solve the problem that the output voltage does not meet the design requirements and the early warning circuit is too single due to the unreasonable setting of the overshoot suppression circuit in the prior art. and other technical issues

Method used

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  • FPGA based over-current monitoring circuit
  • FPGA based over-current monitoring circuit

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Embodiment 1

[0024] Such as figure 1 , the reference voltage nodes V1-V4 can be powered by a DC voltage source or a microcontroller voltage output terminal, the overshoot signal is introduced through the input voltage signal Vin, and the working state of the depletion type field effect transistor Q2 is a non-modulation state, That is, the input voltage signal is directly equal to the output voltage signal Vout; for the reference voltage node V2, it is necessary to keep the difference between the input voltage signal and the positive voltage of the reference voltage node V2 higher than the voltage value of the modulation drive signal; when the voltage value of the reference voltage node V3 is higher than Modulate the voltage value of the driving signal or when the comparator U6 outputs a high level, and when an overshoot signal is detected at the non-inverting input terminal of the operational amplifier U2, the NAND gate U3A makes the field effect transistor Q1 cut off, and the operational a...

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Abstract

The invention discloses an FPGA based over-current monitoring circuit. The FPGA based over-current monitoring circuit relates to the field of circuit design and aims at solving the technical problems such as output voltage overshoot or too much negative gain caused by an unreasonably arranged overshoot suppression circuit and a too single warning circuit in the prior art. The FPGA based over-current monitoring circuit mainly comprises a linear compensation driving circuit for receiving an input voltage signal; a first operational amplifier used for cutting off an output voltage signal, receiving a feedback signal output by the linear compensation driving circuit and outputting a modulation driving signal to the linear compensation driving circuit; a voltage detecting circuit used for receiving the modulation driving signal output by the first operational amplifier; and an overshoot detecting circuit used for receiving the feedback signal output by the linear compensation driving circuit and a detecting signal output by the voltage detecting circuit. The FPGA based over-current monitoring circuit is used for providing voltage modulation.

Description

technical field [0001] The invention relates to the field of circuit design, in particular to an FPGA-based overcurrent monitoring circuit. Background technique [0002] In the prior art, the use of AC power supply, the introduction of more unstable loads, there are a lot of system electromagnetic noise and overshoot signals; therefore, it is very necessary to introduce a high-efficiency and reasonable voltage modulator and over-current monitoring. For a voltage modulator with overshoot suppression, such as a modulator with a Zener diode, since the output is limited by the non-differential chopping method, it suppresses the input signal gain and is not suitable for the feedback detection of the control chip; The modulator with the structure of operational amplifier and field effect tube, when the input signal is a negative signal source, there is unnecessary overshoot suppression, resulting in the output voltage being too low and unable to provide the load operating voltage....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/003
CPCH03K19/003
Inventor 张凯胜刘华吴小莉
Owner CHENGDU ZHIRENSHANYONG INFORMATION TECH CO LTD
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