Research on the Waveform Synthesis of Electromagnetic Detection Inverter Based on FPGA

Complex geological conditions and limited launch frequencies are the problems which the geological electromagnetic detection faced in our country. In this paper, we designed two FPGA-based detection of electromagnetic emission source inverter control circuits, one is using a phase-shift and complementary drive signal to expand the load range of electromagnetic emission system; the other one is using waveform synthesis technology to achieve that multiple frequencies could launch at one-time, and this method improves the detection accuracy. Both the two control circuits have a positive role in promoting the performance of electromagnetic detection equipment the development of Geological Survey in China.