Patent ID: 8242768
Filing Date: 2012-08-14
Classification: G01R

Abstract:
1. A system for testing power supply performance, comprising: a DC power supply; a test apparatus for testing the DC power supply; and a control circuit electrically coupled to the DC power supply and test apparatus, the control circuit comprising: an A/D conversion circuit configured for receiving DC voltage signals from the DC power supply and converting the received DC voltage signals to digital signals, the A/D conversion circuit comprising a microcontroller; and a voltage level conversion circuit configured for receiving the digital signals, and converting the received digital signals to voltage level signals which can be identified by the test apparatus, the test apparatus receives the voltage level signals, and generates signal waveforms of the voltage signals according to the received voltage level signals; wherein the A/D conversion circuit comprises a microcontroller, and a transformer, the transformer receives the AC voltage from the AC power supply, and converts the AC voltage to a smaller DC voltage signal, the microcontroller comprises a plurality of signal input terminals and a digital signal transmitting terminal, each signal input terminal receives DC voltage signals from the transformer and the DC power supply via a plurality of adjustable resistors respectively, a plurality of adjusting terminals of the plurality of adjustable resistors are electrically connected to the plurality of signal input terminals, and the digital signal transmitting terminal outputs the digital signals; wherein the microcontroller further comprises a digital signal receiving terminal, the voltage level conversion circuit further comprises a second voltage level signal receiving terminal, and a second voltage level signal transmitting terminal, the second voltage level signal receiving terminal receives feedback signals from the test apparatus, the voltage level conversion circuit converts the feedback signals to digital signals which can be identified by the microcontroller, the second voltage level signal transmitting terminal transmits the converted feedback signals to the digital signal receiving terminal; wherein the voltage level conversion circuit comprises a voltage level conversion circuit, the voltage level conversion circuit comprises a first voltage level signal receiving terminal, and a first voltage level signal transmitting terminal, the first voltage level signal receiving terminal receives the digital signals, the first voltage level signal transmitting terminal transmits the voltage level signals to the test apparatus.