基于全速电流测试的印制电路板电路故障信息获取方法

针对当前印制电路板(PCB)非介入式故障诊断的需要,结合电源电流测试技术发展现状,提出了基于全速电流测试,通过向测试电路施加测试序列使被测电路处于静置和全功能状态交替工作,采集电源电流在若干个工作周期内的平均电流值以实现非介入PCB电路故障信息获取的新方法.ITC' 97国际标准电路中的CTSV滤波器电路的全速电流测试...

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

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 fauh information obtainment and the at-speed current testing has good application prospects among the non-intrusive fault of printed circuit board.