Acquisition circuit for cardiac pacer
US4550731A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1984 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Mar 7, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/903
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An acquisition circuit for a cardiac pacer includes an oscillator for producing an externally generated magnetic signal at a first predetermined frequency. An implantable cardiac pacer has a tuned inductor coil to be responsive to the magnetic signal for developing an induced signal with a phase-shift. Light-emitting devices are responsive to the magnetic signal and the induced signal are provided for transmitting optical signals which change gradually from flashing to a steady on condition when the telemetry head is moved closer to and adequately positioned over the cardiac pacer to indicate that positive acquisition has been obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.