Nanopore State Encoding for Data Compression
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Solution Overview
Problem
Existing nanopore-based sequencing technologies face challenges in reducing data size due to limitations in communication bandwidth, and they suffer from issues like electrode depletion and salt concentration imbalance during faradaic conduction.
Innovation Solution
The use of non-faradaic conduction through nanopores, which involves no chemical reaction at the electrode surface, and the application of AC modulation to optimize data output by varying the voltage across the nanopore during different states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If faradaic conduction is used in nanopore-based sequencing, then data can be detected through ionic current flow, but electrode depletion and salt concentration imbalance occur
Solution Approach 1:
The patent changes the fundamental conduction mechanism parameter from faradaic (electrochemical reactions) to non-faradaic (capacitive coupling). By applying AC voltage modulation and detecting current through the nanopore via capacitive coupling rather than electrochemical reactions, the system maintains data detection capability while eliminating electrode depletion and salt concentration imbalance issues associated with faradaic conduction.
Solution Approach 2:
The patent replaces the electrochemical reaction-based faradaic conduction mechanism with a capacitive coupling mechanism. Instead of relying on redox reactions at the electrode surface that cause depletion, the system uses non-faradaic conduction where electrical signals are transmitted through the nanopore via capacitive effects, substituting a different physical mechanism that does not consume electrodes or create concentration imbalances.
2Loss of information
If more data is generated by the biochip, then sequencing information increases, but communication bandwidth becomes constrained
Solution Approach 1:
The patent extracts and processes data locally at the nanopore level before outputting to the communication interface. By performing signal processing, baseline subtraction, and feature extraction at the point of measurement, the system reduces the amount of raw data that needs to be transmitted over the communication bandwidth-constrained interface, while preserving essential sequencing information.
Solution Approach 2:
The patent segments the data processing into multiple stages: local processing at the nanopore (signal detection, baseline correction, event identification) and subsequent output of processed data. This segmentation allows complex data to be broken down into manageable units that can be efficiently transmitted, reducing the burden on the communication bandwidth.
3Productivity
If AC modulation is applied to the nanopore voltage, then data output is optimized, but voltage control complexity increases
Solution Approach 1:
The patent applies periodic AC voltage modulation to the nanopore at specific frequencies to optimize data output. By using periodic voltage signals rather than continuous DC voltage, the system enhances signal detection through capacitive coupling while maintaining manageable voltage control complexity through standardized AC signal generation and modulation techniques.
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 approach reduces the operational lifespan issues of electrodes, avoids salt concentration imbalances, and enables efficient data output by optimizing the detection of molecular states through nanopores.
Implementation Method 1
The use of non-faradaic conduction through nanopores, which involves no chemical reaction at the electrode surface
Implementation Method 2
A nanopore-based sequencing chip may be used for DNA sequencing... the tag held in the nanopore generates a unique ionic blockade signal
Data Source
AI summary
A system includes a circuit configured to detect a voltage corresponding to an electrical measurement of a nanopore. The system also includes a component configured to compare the voltage to another voltage. Based at least in part on the comparison, a one bit indicator is determined. The one bit indicator indicates whether the voltage indicates a change in a state of the nanopore. In the event it is determined that the voltage indicates the change in the state of the nanopore, a multiple bit signal is provided for output.