Patent ID: 7057390

Claim:
A system for producing a highly homogenous raster density distribution having at least 98% linearity and at least 95% uniformity at a high energy level of at least 100 A of linear current swing at 25 kHz comprising: an H-bridge circuit including a center portion and four ends; four branches of power HEXFETs forming a two by two switch; a raster air-core magnet at said center portion; a high voltage power supply connected at two of said four ends; an H-bridge controller connected to said HEXFETs; electrical pathways connecting said HEXFETs, said raster air-core magnet, said high voltage supply, and said H-bridge controller; and said H-bridge controller capable of switching said HEXFETs in an order and at a frequency to produce a triangular current waveform having a constant linear sweep velocity and a minimum turning time at the waveform peak.