To calculate self and mutual inductance of coreless transformer in printedcircuitboard, The author offered a new method to calculate based on Neumann equation as well as testing process and circuit.
As a standard technique of test and Design-For-Testability for testing the digital printedcircuitboard, Boundary-Scan technique has obtained widespread application in electronic equipment.
边界扫描技术是一种标准的数字电路测试及可测试性设计方法，它在工业界得到了广泛的应用。
3
The core of PCB (printedcircuitboard) tester is testing algorithm, which directly determines the testing functions and speed of PCB tester.