Biphasic pulse output stage for electronic stimulating device
First Claim
1. An output stage unit for use in an electronic stimulating device having power supply means adapted to be connected with a power source for supplying a high voltage output and control means for providing timewise spaced control pulses, and including first and second electrodes, said output stage unit, comprising:
- biphasic pulse generating means connected with said power supply means and said control means and responsive to receipt of said high voltage and control pulses therefrom providing a biphasic pulse output;
coupling means including capacitive means and having first and second outputs each of which is adapted to be connected with different ones of said first and second electrodes such that said first electrode provides a return path for said second electrode when said second electrode is active and said second electrode provides a return path for the first electrode when said first electrode is active, said biphasic pulse output being coupled to said first and second outputs through said capacitance coupling means; and
bleeder means, including dual bleeder circuits, connected with said coupling means for discharging said capacitance means after said biphasic pulse output has been coupled therethrough.
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Abstract
A biphasic pulse output stage is disclosed for an electronic stimulating device, such as a transcutaneous nerve stimulating device capable of effecting suppression of pain by nerve fiber stimulation. Biphasic constant current output pulses are applied to a user through an electrode pair noninvasively positioned at the skin of the user. Microprocessor generated control pulses control generation of the biphasic output pulses at one or more biphasic output stages each of which is associated with an electrode pair, and the generated biphasic output pulses are capacitively coupled from each output stage which also includes a bleeder network for effecting capacitor discharge.
120 Citations
20 Claims
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1. An output stage unit for use in an electronic stimulating device having power supply means adapted to be connected with a power source for supplying a high voltage output and control means for providing timewise spaced control pulses, and including first and second electrodes, said output stage unit, comprising:
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biphasic pulse generating means connected with said power supply means and said control means and responsive to receipt of said high voltage and control pulses therefrom providing a biphasic pulse output; coupling means including capacitive means and having first and second outputs each of which is adapted to be connected with different ones of said first and second electrodes such that said first electrode provides a return path for said second electrode when said second electrode is active and said second electrode provides a return path for the first electrode when said first electrode is active, said biphasic pulse output being coupled to said first and second outputs through said capacitance coupling means; and bleeder means, including dual bleeder circuits, connected with said coupling means for discharging said capacitance means after said biphasic pulse output has been coupled therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In an electronic stimulating device having power supply means adapted to be connected with a power source for supplying a high voltage output and control means for providing timewise spaced control pulses, and including first and second electrodes an output stage unit, comprising:
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biphasic pulse generating means connected with said power supply means and said control means, said biphasic pulse generating means including first transistor means for receiving said control pulses and said high voltage and responsive thereto for providing a biphasic pulse output; coupling means, including capacitance means, for receiving said biphasic pulse output from said biphasic pulse generating means, said coupling means having first and second outputs each of which is adapted to be connected with different ones of said first and second electrodes such that said first electrode provides a return path for said second electrode when said second electrode is active and said second electrode provides a return path for the first electrode when said first electrode is active, and said biphasic pulse output being coupled to said first and second outputs through said capacitance means; and dual bleeder circuit means each of which includes resistance means and second transistor means for controlling discharge of said capacitance means after said biphasic pulse output has been coupled therethrough. - View Dependent Claims (14, 15)
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16. A dual output stage unit for an electronic stimulating device having power supply means for supplying a high voltage output and control means for supplying first and second sets of timewise spaced control pulses, said dual output stage unit, comprising:
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multiplexer means connected with said control means for providing said first set of timewise spaced pulses at one output and said second set of timewise spaced pulses at said a second output; first and second biphasic pulse generating means connected with said power supply means and said multiplexer means, said first biphasic pulse generating means receiving said high voltage output and said first set of control pulses and said second biphasic pulse generating means receiving said high voltage output and said second set of control pulses, and said first and second biphasic pulse generating means, responsive to receipt of said high voltage and said control pulses, each providing a biphasic pulse output the pulses of which are timewise spaced from the pulses of the other of said biphasic pulse output; first and second output means each of which includes capacitance means, said first output means being connected with said first biphasic pulse generating means to receive said biphasic pulse output therefrom and capacitively couple said received biphasic pulse output therethrough, and said second output means being connected with said second biphasic pulse generating means to receive said biphasic pulse output therefrom and capacitively couple said received biphasic pulse output therethrough; and first and second bleeder means, each of which is connected with different ones of said first and second capacitance means for discharging said capacitance means after said biphasic pulse output has been coupled therethrough. - View Dependent Claims (17, 18, 19, 20)
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Specification