Modulation system for evoked response stimulation and method

Details Modulation system for evoked response stimulation and method Modulation system for evoked response stimulation and method

1987-06-02

1989-03-28

Jaworski, Francis

Surgery

Truss

Pad

128783, A61B 1505

Patent

active

048154750

ABSTRACT:
A modulation system used for non-surgical biomedical stimulation and for research in the area of evoked responses and a method thereof is described. The modulation system comprises an AND gate used to gate the interaction of a variable frequency oscillator with the inputs from a manual safety and control switch connected to an inverter which is connected to a third input of the AND gate. A second variable frequency oscillator has a non-inverted output Q. The non-inverted output Q is connected to the second input of the AND gate. The second variable frequency oscillator has an on/off duty cycle. The first variable frequency oscillator has an output which has a pulse repetition waveform. The output of the first variable frequency oscillator is connected to the first input of the AND gate. The pulse repetition waveform of the first variable frequency oscillator has a frequency 100 times greater than the range of the non-inverted output Q frequency. The AND gate has an output connected to the input of a pulse width monostable oscillator. The output of the AND gate is a composite of the pulse repetition waveform and the non-inverted output Q which is connected to the input of a stimulation device such as a CW laser. The method of generating evoke responsive stimulation pulses comprises adjusting the first variable frequency oscillator to obtain a pulse waveform then adjusting the second variable frequency oscillator to obtain a second pulse waveform which generate evoked response stimulation pulses. The evoked response stimulation pulses are then applied to a person.

REFERENCES:
patent: 4612934 (1986-09-01), Borkan

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