Variable Inductive Telemetry Coil Drive for Implant Range Shifts
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Solution Overview
Problem
Existing external telemetry systems for ambulatory medical devices face challenges in communicating effectively with implantable devices at varying implant depths and locations without requiring changes to the external telemetry wand or circuits, leading to potential saturation or overwhelming at close distances.
Innovation Solution
A variable inductive telemetry system for implantable medical devices that selectively drives the telemetry coil in single-ended or differential modes based on input from a receiver circuit, adjusting gain settings to maintain optimal communication over a range of distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the telemetry coil is driven at high power to extend communication range, then the communication distance is improved, but the receiver circuit becomes saturated or overwhelmed at close distances
Solution Approach 1:
The patent applies dynamics by making the transmitter output power variable rather than fixed. The system dynamically adjusts the telemetry coil drive strength based on real-time feedback from the receiver circuit about signal quality and distance conditions, allowing optimal power levels for both close and distant communications without saturation or loss of range
Solution Approach 2:
The patent implements feedback by using information from the receiver circuit about the received signal characteristics to control the transmitter output. The receiver provides feedback about signal strength and quality, which the transmitter uses to adjust its output power accordingly, preventing saturation at close range while maintaining extended range capability when needed
2Adaptability or versatility
If a fixed gain setting is used in the receiver circuit, then the circuit design is simplified, but it cannot effectively handle varying implant depths and locations
Solution Approach 1:
The patent applies dynamics by implementing variable gain control in the receiver circuit. The gain setting is dynamically adjusted based on the received signal strength and distance conditions, allowing the receiver to effectively process signals from both shallow and deep implant locations while maintaining a relatively simple overall circuit architecture through automated adaptation
3Productivity
If the telemetry system uses a single operating mode, then the device complexity is reduced, but it cannot optimize performance across different communication distances
Solution Approach 1:
The patent applies dynamics by implementing a single transmitter circuit that can dynamically switch between single-ended and differential drive modes. This dynamic mode selection optimizes communication efficiency for different distances and conditions without requiring physically separate transmitter circuits, balancing performance optimization with device complexity management
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient communication with implantable devices at both shallow and deep implant locations using existing external telemetry systems, conserving power and extending the range without modifying the external equipment.
Implementation Method 1
A variable inductive telemetry system for implantable medical devices that selectively drives the telemetry coil
Data Source
AI summary
Systems and methods are disclosed for inductive telemetry of an implantable medical device including a receiver circuit configured to receive an input signal from a telemetry coil of the implantable medical device and a transmitter circuit configured to selectively drive the telemetry coil of the implantable medical device in a selective one of a single-ended mode or a differential mode using information from the receiver circuit.