Wireless Electrical Stimulation Device Circuit Design
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Solution Overview
Problem
Current implantable electrical stimulation devices require precise alignment with external controllers for energy transmission, are prone to inefficiency when implanted deep, and can be inadvertently activated by electromagnetic interference, leading to user complications.
Innovation Solution
An electrical stimulation system comprising a signal generating circuit, a signal transmitting circuit, a signal receiving circuit, a rectifying circuit, and a signal processing circuit, which allows for wireless energy transmission and reduces the complexity and size of the device, while incorporating a protection circuit to prevent unintended activation by external signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If wireless power supply is used without batteries, then device size is reduced, but precise alignment between external controller and implantable stimulator is required
Solution Approach 1:
The patent replaces the mechanical alignment system with an electromagnetic field-based wireless power transmission system. The external controller transmits power wirelessly through electromagnetic fields, eliminating the need for precise mechanical alignment between the external controller and implantable stimulator, thus reducing device size while maintaining ease of operation
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary medium to transfer power between the external controller and implantable stimulator. This intermediary enables wireless power transmission without requiring direct physical contact or precise alignment, resolving the contradiction between reduced device size and operational ease
2Reliability
If implantable stimulator is placed deep in the body, then therapeutic effect is improved, but energy reception efficiency is greatly decreased
Solution Approach 1:
The patent employs dynamic signal processing and adaptive power transmission techniques that adjust transmission parameters based on the depth and position of the implantable stimulator. This dynamic adjustment optimizes energy delivery to deep-implanted devices, maintaining therapeutic effectiveness while improving energy reception efficiency
Solution Approach 2:
The patent changes transmission parameters such as frequency, power level, and modulation depth to optimize wireless power transmission to deep-implanted stimulators. By adjusting these parameters, the system overcomes tissue attenuation and improves energy reception efficiency at greater depths while maintaining therapeutic effect
3Use of energy by moving object
If implantable stimulator is close to emission source, then power reception is good, but unintended activation by electromagnetic interference occurs
Solution Approach 1:
The patent incorporates feedback mechanisms that continuously monitor the electromagnetic environment and distinguish between intentional power transmission signals and interfering electromagnetic signals. The system uses acknowledgment signals and protocol-based communication to verify legitimate power transmission sources, preventing unintended activation while maintaining good power reception
Solution Approach 2:
The patent implements preliminary verification protocols that check signal authenticity before activating the implantable stimulator. The system requires specific acknowledgment signals and protocol compliance from external controllers, creating a preliminary barrier against electromagnetic interference and unintended activation while allowing legitimate power transmission
4Reliability
If complex circuit design is used to prevent unintended activation, then safety is improved, but device size increases
Solution Approach 1:
The patent designs multi-functional circuit components that perform multiple functions within a single integrated structure. The signal processing circuit handles both power reception and interference detection, while the control circuit manages both power regulation and safety verification. This universality maintains safety without increasing device size
Solution Approach 2:
The patent merges safety verification functions with the existing power reception and signal processing circuits. Instead of adding separate complex safety circuits, the system integrates interference detection, signal verification, and activation control into the existing circuit architecture, maintaining safety while minimizing device size
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
This design enhances the convenience and safety of the electrical stimulation device by allowing non-precise alignment, improving energy transmission efficiency, and minimizing interference-induced errors, thus simplifying the circuit design and reducing device size.
Implementation Method 1
The signal receiving circuit is configured to receive and output a frequency signal
Implementation Method 2
The rectifying circuit is configured to receive the frequency signal and rectify the frequency signal to generate a rectifying signal
Data Source
AI summary
An electrical stimulation device includes a signal receiving circuit, a rectifying circuit and a signal processing circuit. The signal receiving circuit receives and outputs a frequency signal. The rectifying circuit receives the frequency signal and rectifies the frequency signal to generate a rectifying signal. The signal processing circuit receives the rectifying signal to generate an electrical stimulation signal.