Title:
APPARATUS AND METHOD TO DISCRIMINATE BETWEEN TELEMETRY DOWNLINK SIGNALS AND NOISE IN AN IMPLANTED DEVICE
Document Type and Number:
WIPO Patent Application WO2003084606
Kind Code:
A3
Abstract:
A circuit arrangement enables an implanted medical device (IMD) to distinguish between a radio frequency (RF) signal and noise that is transmitted by an external programming unit. In an example embodiment, the IMD includes a receiver circuit a counter circuit counts edges of the demodulated signal occurring within a selected time period. A decoder circuit of the receiver circuit decodes the demodulated signal and compares the number of edges counted with a valid signal before the decoded signal is transmitted to a telemetry processor of the IMD. The receiver circuit also includes a validation circuit that verifies the validity of the decoded signal before transmitting the decoded signal to the telemetry processor.
Inventors:
DAVIS TIMOTHY J
ECKER ROBERT M
REINKE JAMES D
WAHLSTRAND JOHN D
ECKER ROBERT M
REINKE JAMES D
WAHLSTRAND JOHN D
Application Number:
PCT/US2003/009901
Publication Date:
November 10, 2005
Filing Date:
April 01, 2003
Export Citation:
Assignee:
MEDTRONIC INC (US)
International Classes:
A61N1/37; A61N1/36; A61N1/372; (IPC1-7): A61N1/37
Domestic Patent References:
| WO2000062861A1 | 2000-10-26 |
Foreign References:
| US6201993B1 | 2001-03-13 | |||
| US5168871A | 1992-12-08 | |||
| US5241961A | 1993-09-07 | |||
| US5127404A | 1992-07-07 |
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