Design of Compact Large Driving Period Board-Level Interference Generator Based on MOSFET
To solve the problems of large space occupying of the integrated circuit immunity test equipment and breakdown of external circuit components,a kind of board-level jammer which can periodically disturb the source voltage of integrated circuit chip is proposed.The jammer is driven by the series structure of low impedance MOSFET and Schottky diode.The MOSFET switch is controlled periodi-cally by FPGA,and the jamming power signal is synthesized according to the principle of phase accumulation.The frequency and ampli-tude of the jamming power signal can be adjusted by changing the output frequency and feedback resistance of FPGA.The results show that in 1 MHz-10 MHz and 60 MHz-100 MHz bands,the disturbance amplitude of the jammer to the power source of 3 Ω,50 pF load reaches above 0.6 V,and the driving ability is ideal.Therefore,the jammer is suitable for the electromagnetic interference test as the source of interference signal.Compared with the existing equipment,it has the advantages of simple structure,low power consumption,large drive,low cost,safety and convenience.
integrated circuitselectromagnetic interferencetest equipmentinterference signal sourcelarge drive
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