Patent ID: 6778860
Filing Date: 2004-08-17
Classification: A61N

Abstract:
An apparatus comprising:first and second switches adapted to be connected across a patient resistance and activatable when so connected to deliver a current to said patient in response to switching signals activating said first and second switches; a plurality of capacitors providing said current through said first and second switches; and capacitor switch means for selectively coupling said plurality of capacitors into parallel relation with one another to generate an approximate rectangular waveform for said current; wherein said capacitor switch means and said plurality of capacitors cooperate to cause said waveform to rise to a first voltage level, decay for a selected time interval and thereafter experience a second rise and decay for a second selected time interval; and wherein said plurality of capacitors includes a first and a second capacitor and said second rise and second delay are caused by said capacitor switch means switching of the second capacitor into parallel connection with the first capacitor.