To improve the output waveform of the inductive energy storage pulse power source

this paper presents a quasi-square wave output pulse power source based on electric explosive opening switch（EEOS）.This kind of pulse power source uses a pulse capacitor for initial energy storage

which discharges to EEOS through the pulse forming network（PFN）. The EEOS switches off when the discharge current nearly reaches the peak

thus the energy is switched to the load. Since the current in the PFN’s inductors cannot mutate

the load voltage can amount to several times the charging voltage of the storage capacitor.Due to the non-mutated voltages in the PFN’s capacitors

the load voltage can be of quasi-square wave.Parameters of the EEOS and the PFN are determined by theoretical analysis and circuit simulation

and the present power source is verified by experiment. When a 1 μF storage capacitor is charged to 32 k V

on the 10 Ω load the present pulse power source obtains the output pulse voltage with 83 k V in amplitude

279 ns in FWHM

and about 172 ns in full width of 90% amplitude

indicating that the present quasi-square wave output pulse power source is feasible.