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Full-range electrotherapy unit with digital force modulator

  • US 20060129208A1
  • Filed: 12/13/2004
  • Published: 06/15/2006
  • Est. Priority Date: 12/13/2004
  • Status: Active Grant
First Claim
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1. An electrotherapy unit comprising:

  • a digital force modulator;

    a power supply connected the digital force modulator and supplying power to the digital force modulator;

    a central processor connected to the digital force modulator, the central processor being downloadable with programs to output signals for controlling operation of the digital force modulator;

    a voltage-increasing transformer including a primary coil and a secondary coil; and

    two conductive pads connected to the secondary coil;

    the digital force modulator comprising two pairs of transistors, each said transistor including an input side connected to the central processor, the central processor controlling conduction/non-conduction of the transistors, a loop for each said transistor being connected to the power supply and the primary coil of the voltage-increasing transformer, a diode and a capacitor being connected in parallel between a collector and an emitter of each said transistor, the diodes avoiding damage to the transistors resulting from an electromotive generated by the primary coil of the voltage-increasing transformer, the capacitors reducing noise signals generated during switching operation of the transistors and the diodes, and the capacitors providing bypass for high-frequency noise signals.

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