The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 1990
Filed:
Jun. 12, 1987
Joel R Dufresne, St. Paul, MN (US);
William L Sondermann, Minneapolis, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A biological tissue stimulator is disclosed having an adjustable high voltage power supply. The high voltage power supply is coupled to a battery producing a high voltage signal to be supplied to an output circuit for supplying an electrical stimulation signal of a predetermined current amplitude. An electrode is coupled to the electrical stimulation pulse and is adapted to be coupled to the biological tissue to deliver the electrical stimulation signal to the biological tissue. An adjustment mechanism is coupled to the output stage and to the adjustable high voltage power supply for comparing the amplitude of the high voltage signal to the amplitude of the voltage drop across the biological load and adjusting the amplitude of the high voltage signal dependent upon the result of that comparison. The adjustment mechanism adjusts the amplitude of the high voltage signal to minimize the difference in the amplitude between the high voltage signal and the voltage drop across the biological load thereby maximizing the energy efficiency of the biological tissue stimulator.