Nanopore Measurement Data Compression Under Biochip Bandwidth Limits
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Solution Overview
Problem
Existing nanopore-based sequencing technologies face challenges with faradaic conduction, which leads to electrode depletion, osmotic pressure imbalance, and performance degradation due to chemical reactions at the metal surface, limiting data transmission rates and electrode lifespan.
Innovation Solution
Implementing non-faradaic conduction through noble metals like platinum or gold, utilizing AC signals to draw and release tags, and optimizing the double layer capacitance to enhance ion flow without chemical reactions, enabling efficient and reversible ionic current measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If faradaic conduction is used in nanopore-based sequencing, then ionic current can be measured, but electrode depletion and osmotic pressure imbalance occur due to chemical reactions at the metal surface
Solution Approach 1:
The patent replaces faradaic conduction (chemical/electrochemical process) with non-faradaic conduction (physical capacitive process). Instead of using metal electrodes that undergo chemical reactions, the system uses capacitive coupling through dielectric layers to achieve ionic current measurement without electrode depletion or chemical side reactions.
Solution Approach 2:
The patent introduces dielectric layers as intermediary components between the measurement circuitry and the electrolyte. These dielectric layers enable capacitive coupling that allows ionic current measurement while preventing direct contact between metal electrodes and the electrolyte, thus eliminating chemical reactions at the electrode surface.
2Reliability
If non-faradaic conduction with AC signals is used, then chemical reactions are eliminated, but complex signal processing is required to draw and release tags
Solution Approach 1:
The patent employs periodic AC signals to drive the nanopore measurement system. The AC signal alternates between positive and negative cycles, which periodically draws tags into the nanopore during positive cycles and releases them during negative cycles. This periodic action simplifies the overall system by using simple oscillating voltage rather than complex control sequences.
3Productivity
If data transmission rate is increased to gigabits per second, then sequencing efficiency improves, but communication bandwidth limitations in biochips become more severe
Solution Approach 1:
The patent extracts and processes measurement data locally at the nanopore level before transmitting to the external system. By performing initial processing and compression at the source, the system reduces the amount of data that needs to be transmitted over the biochip communication bandwidth, thereby achieving high data transmission rates despite bandwidth limitations.
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 prolongs electrode lifespan, reduces osmotic pressure imbalances, and enhances data transmission rates up to gigabits per second, allowing for accurate and reliable nucleotide sequencing with reduced detection time and improved chip performance.
Implementation Method 1
measuring an ionic current flow through the membrane
Implementation Method 2
optimizing the double layer capacitance to enhance ion flow without chemical reactions
Data Source
AI summary
A system includes a plurality of nanopore cells. Data corresponding to nanopore states of the plurality of nanopore cells is received. The data is analyzed to determine a compressed output size of the data given at least one compression technique. It is determined whether the compressed output size exceeds a data budget. In the event it is determined that the compressed output size exceeds the data budget, the data is modified. The modified data is outputted.