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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 th

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.

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An electric power supply for providing electrical energy to an electrically operated medical device comprising: capacitor means for accommodating an electric charge; first means providing a regulated source of unidirectional electrical energy; second means connecting said first means to said capacit

An electric power supply for providing electrical energy to an electrically operated medical device comprising: capacitor means for accommodating an electric charge; first means providing a regulated source of unidirectional electrical energy; second means connecting said first means to said capacitor means for supplying charging current to said capacitor means at a first voltage which increases with charge in the capacitor means; third means deriving from said first means a comparison second voltage of constant magnitude; comparator means operative when said first voltage reaches a first value to reduce said first voltage to a second, lower value; and voltage regulator means connected to said capacitor means and medical device to limit the voltage supplied to the medical device.