Patent ID: 7821871

Claim:
A switching circuit for an electromagnetic source for generating acoustic waves, comprising: a first capacitor connected in parallel with a series circuit composed of a second capacitor and an electronic switch; a coil of an electromagnetic source connected to said first capacitor and to said series circuit; and first and second capacitors being dimensioned, and said electronic switch being operated, for causing, after said first and second capacitors are charged, said electronic switch to assume a blocking state during discharge of said first capacitor as long as said first capacitor is charged with a larger voltage than said second capacitor, and said electronic switch switching to a conductive state as soon as the voltage of the first capacitor, during discharge thereof, reaches substantially the voltage of said second capacitor, whereupon said second capacitor begins to discharge and said first capacitor continues to discharge, said first and second discharging capacitors feeding said coil with current.