Multi-Channel A/D Converter for Biosensor Resolution
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Solution Overview
Problem
Conventional blood sugar determining instruments have limited resolution due to the use of single-channel A/D converters, which restricts the precision of glucose concentration measurement.
Innovation Solution
A biosensor with multi-channel A/D conversion is introduced, featuring a chip that generates time-dependent analog signals, a multi-channel A/D converter, and a microprocessor to improve resolution without increasing complexity, by converting analog signals to digital signals with a higher bit number.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single-channel A/D converter is used, then the device complexity is low, but the measurement precision is limited
Solution Approach 1:
The A/D conversion process is segmented into multiple channels, where each channel processes a different portion of the analog signal. This segmentation allows the system to achieve higher effective resolution by combining results from multiple lower-resolution conversions, thereby improving measurement precision without requiring a single complex high-resolution converter
Solution Approach 2:
The patent transitions from single-dimensional (single-channel) A/D conversion to multi-dimensional (multi-channel) conversion. By adding the channel dimension, the system processes the same analog signal through multiple parallel conversion paths, effectively increasing the information content and resolution of the digital output without proportionally increasing overall system complexity
2Measurement precision
If a single-channel A/D converter is used, then the device complexity is low, but the resolution of detection is limited
Solution Approach 1:
The detection resolution is improved by segmenting the A/D conversion into multiple channels, where each channel contributes a portion of the total resolution. The multi-channel architecture divides the conversion task so that combined digital outputs from all channels provide higher effective resolution than any single channel could achieve alone
Solution Approach 2:
Multiple A/D conversion channels are merged to produce a combined digital signal with higher resolution. The patent combines the digital outputs from multiple channels through processing operations that integrate the information from each channel, achieving superior detection resolution without requiring each individual channel to be extremely complex
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
The multi-channel A/D converter enhances the precision of glucose concentration detection, providing higher resolution than conventional single-channel systems without adding complexity to the biosensor design.
Implementation Method 1
a multi-channel A/D converter having a plurality of channels simultaneously receiving the time-dependent analog signal in each sampling interval so that the multi-channel A/D converter converts the time-dependent analog signal to a set of digital signals
Implementation Method 2
The reaction layer 124, which covers the electrode section 1221, is dissolved by the blood, which starts an enzyme reaction... Potassium ferrocyanide is produced in an amount corresponding to the glucose concentration
Implementation Method 3
The blood is partially sucked into the reaction layer 124 by capillary action
Implementation Method 4
a predetermined voltage Vref is applied on the chip 12 to electrochemically oxidize potassium ferrocyanide to release electrons. A response current is generated and passes through the operational terminal 1222. The response current is proportional to the concentration of potassium ferrocyanide produced by the enzyme reaction or to the concentration of the glucose
Data Source
AI summary
A biosensor with multi-channel A/D conversion and a method thereof are provided. The present biosensor includes a chip generating a time-dependent analog signal in response to a content of a specific component of a specimen provided thereon, a multi-channel A/D converter, and a microprocessor. The multi-channel A/D converter has multiple channels simultaneously receiving the time-dependent analog signal in each sampling interval to convert the time-dependent analog signal to a set of digital signals. The microprocessor receives the sets of digital signals in a period of sampling time and determines the content of the specific component based on the sets of digital signals. The present biosensor provides a multi-channel A/D conversion for the time-dependent analog signal to improve the resolution of the determination of the content of the specific component.