Electrode Array Signal Routing Across Multiple Frequency Ranges
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Solution Overview
Problem
Existing electrode array devices struggle to efficiently perform multiple functions, such as measurement and stimulation, across different frequency ranges and applications, due to limitations in signal processing and electrode utilization.
Innovation Solution
The electrode array device incorporates multiple active chips, each specialized for specific frequency ranges and functions, connected by a signal path selector that dynamically routes electrodes to the appropriate chip for optimal performance, allowing for versatile and efficient operation across various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single active chip is used for all measurement functions, then device complexity is reduced, but adaptability and measurement precision across different frequency ranges deteriorate
Solution Approach 1:
The system divides the measurement functionality into multiple active chips, each specialized for specific frequency ranges (e.g., first active chip for LFP signals, second active chip for AP signals). This segmentation allows each chip to be optimized for its designated frequency range, improving measurement precision while maintaining manageable device complexity through modular architecture.
Solution Approach 2:
The electrode array device achieves multi-functionality by integrating multiple active chips that can handle different frequency ranges and measurement types. The system can perform both LFP and AP measurements simultaneously using different chips, making the device universally applicable to various neural recording applications without requiring separate dedicated devices.
2Measurement precision
If multiple active chips are used for different frequency ranges, then adaptability and measurement precision improve, but device complexity increases
Solution Approach 1:
The signal path selector acts as an intermediary component that manages connections between electrodes and active chips. It dynamically routes signals to the appropriate active chip based on frequency range requirements, enabling precise measurements across different frequencies while abstracting the complexity of multi-chip management from the user and simplifying the overall system control.
Solution Approach 2:
The system employs dynamic signal routing where the signal path selector can change connections in real-time based on the frequency range being measured. This dynamic reconfiguration allows the same electrode array to be adaptively connected to different active chips, optimizing measurement precision for each frequency range without requiring fixed, complex hardware configurations.
3Measurement precision
If electrodes are dedicated to specific functions, then measurement precision for that function improves, but adaptability and electrode utilization deteriorate
Solution Approach 1:
The signal path selector enables dynamic reassignment of electrodes to different active chips based on measurement requirements. Electrodes can be connected to the first active chip for LFP measurements or to the second active chip for AP measurements, allowing the same physical electrodes to serve multiple functional purposes while maintaining high measurement precision for each specific function.
4Area of stationary object
If a single chip handles all signal processing, then area requirements are minimized, but functionality and noise reduction capability deteriorate
Solution Approach 1:
The system segments signal processing functions across multiple active chips, with each chip dedicated to specific frequency ranges and measurement types. This physical separation allows each chip to be smaller and more specialized, reducing the area required per chip while the collective functionality of all chips provides comprehensive measurement capabilities that would be difficult to achieve in a single large chip.
Solution Approach 2:
By extracting specific frequency range processing functions into separate active chips, the system removes the need for a single large chip to handle all processing. Each active chip can be optimized for its specific function, reducing individual chip area requirements while the ensemble of specialized chips provides enhanced overall functionality and noise reduction through specialized processing.
Data Source
AI summary
An electrode array device includes a first electrode array including a plurality of electrodes configured to contact a target, a first active chip configured to perform, with the first electrode array, a first measurement function on the target using a first frequency range and receive a first input signal corresponding to the first frequency range from the first electrode array, a second active chip, which is structurally different from the first active chip, configured to perform, with the first electrode array, a second measurement function on the target using a second frequency range that is different from the first frequency range and receive a second input signal corresponding to the second frequency range from the first electrode array, and a signal path selector.