Multipurpose biomedical pulsed signal generator
First Claim
1. A device for generating a pulsed electrical signal for use in biomedical applications, said device comprising:
- first means for producing asymmetric oscillations, said first oscillator means producing a logic signal having first oscillations when said device is in electrical connection with a power source;
second means for producing asymmetric oscillations, said second oscillator means producing second oscillations when said device is in electrical connection with a power source, said second oscillations being complementary to said first oscillations;
circuit means for combining said first and second oscillations to produce an output waveform, said circuit means operating to switch said second oscillator "on" or "off" depending on a state of said logic signal; and
output means for transmitting said output waveform to electrodes for stimulating biological tissue.
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Abstract
A pulsed signal generator for biomedical applications, including electrical stimulation of fracture healing, treatment of osteoporosis, or to strengthen a freshly-healed bone after a cast or other fixation device has been removed. The generator includes dual asymmetric oscillators and associated circuitry to deliver signals efficiently throughout the area to be treated. The components can readily be selected so as to produce any desired output signal, including fixed-magnitude signals and (via suitable voltage-regulating devices) variable-magnitude signals. In addition, the pulse frequency and/or interval can be fixed or adjustable, as may be convenient. In a preferred embodiment of the invention, the generator is powered by readily-available, inexpensive batteries.
89 Citations
22 Claims
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1. A device for generating a pulsed electrical signal for use in biomedical applications, said device comprising:
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first means for producing asymmetric oscillations, said first oscillator means producing a logic signal having first oscillations when said device is in electrical connection with a power source; second means for producing asymmetric oscillations, said second oscillator means producing second oscillations when said device is in electrical connection with a power source, said second oscillations being complementary to said first oscillations; circuit means for combining said first and second oscillations to produce an output waveform, said circuit means operating to switch said second oscillator "on" or "off" depending on a state of said logic signal; and output means for transmitting said output waveform to electrodes for stimulating biological tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device for generating a pulsed electrical signal for use in biomedical applications, said device comprising:
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a first asymmetric oscillator, said first oscillator producing a first output signal when said device is in electrical connection with a power source; a second asymmetric oscillator, said second oscillator producing a second output signal when said device is in electrical connection with said power source, said second output signal being complementary to said first output signal, at least one of said first and second oscillators including a first signal inverter having an output, a second signal inverter having an input driven by said output of said first signal inverter, an asymmetric resistive circuit coupling said output of said first signal inverter to an isolated signal node, at least one capacitor coupling an output of said second signal inverter to said isolated signal node, and at least one resistor coupling said isolated signal node to an input of said first signal inverter; means for combining said first and second output signals to produce an output waveform; and means for transmitting said output waveform to electrodes for stimulating biological tissue. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification