Nonintrusive fault information obtainment of printed circuit board based on atspeed current testing

GUO Chaoyou，OUYANG Guangyao，WU Xiongxue
（College of Naval Architecture and Power， Naval University of Engineering， Wuhan 430033，China）

Abstract：For nonintrusive fault information obtainment of printed circuit board(PCB)， an new method based on atspeed current testing was presented. The circuit under atspeed current testing worked on two alternative states by applying two alternative vectors to the circuit. And the fault information was obtained by measuring the average current flowing from VDD to GND of the power supply for the circuitundertest. SPICE simulation about a continuoustime statevariable filter circuit under the atspeed current testing， shows the feasibility of the atspeed current testing apply to the nonintrusive fault information obtainment and the atspeed current testing has good application prospects among the nonintrusive fault of printed circuit board.
Key words：atspeed current testing；printed circuit board(PCB)； nonintrusive； fault information obtainment； fault diagnosis