Apparatus and method to discriminate between telemetry downlink signals and noise in an implanted device
US6788973B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2002 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Dec 25, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3718
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implanted medical device (IMD) conserves power by discriminating received radio frequency (RF) signals between noise and data based on frequency. Data is processed while noise is attenuated. The IMD operates in a first, relatively low, power mode while not receiving the RF signals, in a second, higher, power mode responsive to receiving RF signals, and operates in still higher power mode when the RF signals' average frequency over a selected period is within a predetermined range. A receiver circuit receives RF signals and discriminates a data signal from noise based on average frequency of the RF signals over selected time periods. The receiver circuit operates in a power-conserving mode unless it receives RF signals, or otherwise operates in a relatively higher-power mode. The receiver transfers signals to a telemetry circuit that operates in a power-conserving mode until it receives a valid data signal to operate in higher power mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.