Programmable electronic load

Abstract

The invention discloses a programmable electronic load. The electronic load is measured by AD after amplifying two paths of current signals by superposition. The two paths of circuits have the same structure and consist of an operational amplifier circuit, a drive circuit, a field effect transistor and an operational amplifier superposition circuit which are connected in turn respectively. A DA signal is amplified once, connected with an input end of the operational amplifier circuit with a tensile load current control signal, amplified and then output to a drive amplifying circuit; the signal is output by the drive amplifying circuit and then connected with a gate of the field effect transistor; a source of the field effect transistor is connected with a positive electrode of a power supply, while a drain is connected with a negative electrode of the power supply through current sampling resistors which are connected in series; the two ends of the current sampling resistors are connected with an in-phase input end and an inverting input end of an operational amplifier respectively; and one path of the signal is connected with the drive amplifying circuit after being output by the operational amplifier, and the other path of signal is superposed with another circuit to be amplified to perform AD measurement. By adopting superposition of two paths of current signals, dynamic test of the signal from a high end to a low end can be realized, output of any dynamic load current waveform is realized, and dynamic test speed is improved.

Description

Technical field [0001] The invention relates to an electronic load, in particular to a programmable electronic load applying dynamic testing. Background technique: [0002] The function of the programmable electronic load is to adjust and control the load current to simulate various load waveform characteristics. At present, the widely used programmable electronic load adjusts and controls the load current by the method of hardware analog circuit. The adjustment and control have poor adaptability and real-time performance, and cannot adapt to the specific conditions of different power supplies, and cannot adjust and control the load in real time. Current. The general programmable electronic load only has the function of static load, and the electronic load meter with dynamic load function only realizes dynamic switching between two different load positions. The dynamic load has a single form and cannot meet some higher requirements and special tests. Needs. Summary of the inve...

AI Technical Summary

Problems solved by technology

Currently widely used programmable electronic loads are used to adjust and control the load current by using hardware analog circuits. The adaptability and real-time performance of adjustment and control are poor, and they cannot adapt to the specific conditions of different power supplies, and cannot adjust and control loads in real time. electric current

The general programmable electronic load only has the function of static load, and the electronic load instrument with dynamic load function can only realize dynamic switching between two different load positions. The form of dynamic load is single, which cannot meet some higher requirements and special tests. needs

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