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Pulse width adaptation for inductive links

一种脉冲宽度、器械的技术，应用在人工呼吸、物理治疗、电疗法等方向，能够解决变化不非常鲁棒等问题

Active Publication Date: 2010-12-29
MED EL ELEKTROMEDIZINISCHE GERAETE GMBH
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AI Technical Summary

Problems solved by technology

[0007] Low-complexity detection methods based on asynchronous oversampling and counting (O&C) algorithms are commonly used, but these are not very robust against changes

Method used

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  • Pulse width adaptation for inductive links
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  • Pulse width adaptation for inductive links

Examples

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Embodiment Construction

[0016] For near field communication (NFC) systems implemented for implantable devices such as cochlear implants, changes in parameters and conditions strongly affect the shape of the HF signal and thus the duration of high and low logic states. Therefore, the robustness of detection algorithms based on O&C algorithms is severely limited by the oversampling factor (k) and decision interval. While k strongly affects power consumption (higher k leads to higher power consumption) and it is thus limited, the decision interval is a free design parameter. To increase robustness, the decision interval can be defined in an adaptive manner where a known training sequence at startup sets the optimal interval at the target decoder.

[0017] As explained above, typical NFC systems are characterized by:

[0018] · Passive NFC,

[0019] Initiator,

[0020] · Inductive link,

[0021] OOK modulation of RF sinusoids (forward link),

[0022] · Non-coherent demodulation and detection, and

...

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Abstract

A signal processor is described for communication with an implanted medical device. An external processor transmits to the implanted medical device an implant data signal having a sequence of HI and LOW logic states at a fixed data bit rate. The pulse width durations of the HI and LOW logic states is adjustable in response to feedback telemetry data from the implantable medical device.

Description

[0001] This application claims priority to US Provisional Patent Application 60 / 955,063, filed August 10, 2007, the contents of which are incorporated herein by reference. technical field [0002] The present invention relates to digital data and energy transmission methods for implantable medical devices, and in particular, to signal conditioning of data signals to be more robust against random variations and unknown parameters. Background technique [0003] Many implantable medical devices receive data signals generated outside the body that can also serve as a source of electrical power for the implant. Typically, data signals are transmitted over an electromagnetic field inductive link using a system of near field communication (NFC) in the high frequency (HF) radio frequency (RF) band (3-30 MHz). For example, a magnetic field induction (MFI) link can transmit and receive between an in vitro signal processor and an implantable device based on transformer-type induction b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N1/36
CPCA61N1/37211A61N1/372A61N1/37223A61N1/3727
Inventor 约瑟夫·保珈特纳尔约瑟·罗德里古斯-纳瓦罗马丁·斯托法纳勒安迪亚斯·米特尔
Owner MED EL ELEKTROMEDIZINISCHE GERAETE GMBH
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