Implant communication system with frequency shift means
US4532932A · kind A · utility
76Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1984 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Jan 3, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0031
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implant communication system is disclosed for use with an enclosure having a tuned coil mounted therein that is implanted in a patient. A low impedance shunt circuit is connected across the tuned coil, with the impedance of the shunt circuit being modulated in accordance with a data signal. The tuned coil reradiates the phase and amplitude of an externally generated magnetic carrier signal at a selected frequency. A second shunt circuit is connected across the tuned coil for changing its tuning, to enable the tuned frequency to correspond to the selected frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.