Full-range electrotherapy unit with digital force modutator

Details Full-range electrotherapy unit with digital force modutator Full-range electrotherapy unit with digital force modutator

2007-04-24

2007-04-24

Pezzuto, Robert (Department: 3766)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

Reexamination Certificate

active

11011286

ABSTRACT:
An electrotherapy unit includes a central processor, a digital force modutator connected to and controlled by the central processor, a voltage-increasing transformer, and two conductive pads connected to a secondary coil of the voltage-increasing transformer. The digital force modutator includes two pairs of transistors each having an input side connected to the central processor. The central processor controls conduction
on-conduction of the transistors. A loop for each transistor is connected to the power supply and the primary coil of the voltage-increasing transformer. A diode and a capacitor are connected in parallel between a collector and an emitter of each transistor. The diodes avoid damage to the transistors resulting from an electromotive generated by the primary coil of the voltage-increasing transformer. The capacitors reduce noise signals generated during switching operation of the transistors and the diodes. The capacitors provide bypass for high-frequency noise signals.

REFERENCES:
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patent: 4890616 (1990-01-01), Pinckaers
patent: 5036850 (1991-08-01), Owens
patent: 6249706 (2001-06-01), Sobota et al.
patent: 2001/0044640 (2001-11-01), Akiyama et al.
patent: 2003/0187485 (2003-10-01), Sturman et al.
patent: 63294255 (1988-11-01), None

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