Reverse Engineering Printed Circuit Board for Electro-Magnetic Shielding

Reverse Engineering Printed Circuit Board for Electro-Magnetic Shielding

1> Effective electro-magnetic shielding on power supply, isolate high voltage power supply with sensitive circuit especially for switch power supply, which can cause high frequency radiation and transmission interference. Use power supply transformer with ESD shielding to suppress the common code interference on the power supply line. Multiple shielding isolated transformer can have better functions.

2> For all the circuit functional state of Printed Circuit Board reverse engineering, power supply should keep low output impedance, the output capacitor should express low impedance even within the frequency scope, at the same time, manostat should be given fast enough responding speed to bate the high frequency ripple wave and transition load.

3> when reverse engineering Printed Circuit Board commutation diode, it should work in the lowest density current, provide sufficient radio frequency side road for zener diode;

7> Power supply transformer should be balanced and sync when reverse engineering Printed Circuit Board, not suppose to power balance. The metal core material should choose the lower limit value of saturation induction density. No matter how, the iron core should not in the state of saturation when reverse engineering Printed Circuit Board, the iron core of transformer should choose D type, C type, the E type is worst.

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