Full-range electrotherapy unit with digital force modulator
First Claim
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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Abstract
An electrotherapy unit includes a central processor, a digital force modulator 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 modulator includes two pairs of transistors each having an input side connected to the central processor. The central processor controls conduction/non-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.
15 Citations
7 Claims
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1. An electrotherapy unit comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. An electrotherapy unit comprising:
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an analog power amplifier including a first digital force modulator;
a power supply connected the analog power amplifier and supplying power to the analog power amplifier, the power supply including a second digital force modulator and a rectifying transformer;
a central processor connected to the power supply and the analog power amplifier, the central processor being downloadable with programs to output signals for controlling operation of the first digital force modulator and to output pulse signals to the analog power amplifier;
a voltage-increasing transformer; and
two conductive pads connected to the voltage-increasing transformer;
the second digital force modulator comprising two pairs of transistors, each said transistor including an input side connected to the central processor via an encoder, the central processor controlling conduction/non-conduction of the transistors, a loop for each said transistor being connected to the power supply and a primary coil of the rectifying transformer, the rectifying transformer including an output connected to the analog power amplifier, 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. - View Dependent Claims (7)
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Specification