Biological tissue stimulator with adjustable high voltage power supply dependent upon load impedance
US4917093A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1987 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Jun 12, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36034
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.