Abstract: A transcutaneous electrical nerve stimulation apparatus having stimulus electrical pulses modulated in time and intensity to stimulate afferent nerves and cause the release of endogenous opiates which suppress pain. An astable pulse generator provides a first train of pulses at a selected repetition rate. A monostable pulse generator connected to receive the first train of pulses supplies a second pulse train having the frequency of the first train. The width of the pulses of the first train is varied over a predetermined range. A second monostable pulse generator connected to pulse amplifiers receives the first and second train of pulses and provides a supply pulse to the patient. Adjustable pulse modulators connected to the second pulse generators function to simultaneously increase the repetition rate of the first train of pulses and decrease the second train of pulses.

Abstract: A transcutaneous electrical nerve stimulation apparatus having stimulus electrical pulses modulated in time and intensity to stimulate afferent nerves and cause the release of endogenous opiates which suppress pain. An astable pulse generator provides a first train of pulses at a selected repetition rate. A monostable pulse generator connected to receive the first train of pulses supplies a second pulse train having the frequency of the first train. The width of the pulses of the first train is varied over a predetermined range. A second monostable pulse generator connected to pulse amplifiers receives the first and second train of pulses and provides a supply pulse to the patient. Adjustable pulse modulators connected to the second pulse generators function to simultaneously increase the repetition rate of the first train of pulses and decrease the second train of pulses.

Abstract: A transcutaneous electrical nerve stimulation apparatus having stimulus electrical pulses modulated in time and intensity to stimulate afferent and efferent nerves and cause the release of endogenous opiates which suppress pain. An astable pulse generator provides a first train of pulses at a selected repetition rate. A monostable pulse generator connected to receive the first train of pulses supplies a second pulse train having the frequency of the first train. The width of the pulses of the first train is varied over a predetermined range. A second monostable pulse generator connected to pulse amplifiers receives the first and second train of pulses and provides a supply pulse to the patient.

Abstract: An electric power supply operates to supply electrical energy to an electronic device implanted within a living body. The electric power supply has a capacitor which is used as the principal power source. A voltage regulator, overvoltage inhibitor, and a diode are cooperatively arranged to couple the capacitor with an induced voltage source used to charge the capacitor. The diode prevents the capacitor from discharging through the charging circuit when capacitor charging is not taking place. A regulator is used to control the electrical energy that flows to the electronic device. In one form of the electric power supply, a make-before-break switch unit is used to alternately connect the electric device with a charged capacitor or a battery power source so as to provide continuous electrical energy to the electronic device.

Abstract: A device operable to electrically stimulate living tissue, including body organs, muscles and nerves. The device can be applied to the surface of the body or implanted in the body. The device has an electrical circuit containing a pulse width control for variation of the stimulus intensity, pulse repetition rate, and on-time of the pulse to vary the pulse width. A variation in pulse width causes the stimulus variation of the stimulus intensity in a prescribed mathematical manner so as to approximately follow the curves of the strength-duration pulse stimulus amplitude versus pulse width. This provides for an optimal selection among the various classes of stimulated nerve fibers within a nerve tract or bundle. A precise adjustment of stimulation can be achieved so as to optimize sensation of pain relief.