Three wire system for Cochlear implant processor
US5042084A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1989 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Sep 7, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/606
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A transmission system wherein a transmitter includes a first tuned circuit and a transmitter coil is part of a second tuned circuit. A coupling means couples energy between the first tuned circuit and the second tuned circuit. A three wire unshielded cable carries both radio frequency and audio frequency signals. Filter means are provided for filtering the audio frequency signal so that it is free of interference from the radio frequency signal, which may include audio components due to its generally pulsed nature. The circuit may be adjusted for relatively constant coupling to a receiving coil as separation between the transmitter coil and the receiving coil changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.