Segmented Signal Conditioning Circuit for Wide-Range Voltage Sampling
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Solution Overview
Problem
Existing signal conditioning circuits face challenges in accurately sampling and conditioning voltage signals due to large input voltage ranges, leading to insufficient sampling accuracy or the inability to sample small voltages, and require complex and costly configurations for segmented sampling.
Innovation Solution
A segmented selectable signal conditioning circuit is provided, comprising a voltage threshold circuit, a selection circuit, and a segmented voltage conditioning circuit with two sub-circuits. The selection circuit outputs conduction signals based on the input voltage relative to a threshold, allowing each sub-circuit to condition the input voltage signal differently, thereby extending the sampling range and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed amplification multiple is applied to amplify the input voltage, then the sampling range is extended, but the sampling accuracy deteriorates
Solution Approach 1:
The voltage conditioning circuit is divided into multiple segmented sub-circuits, each handling a specific voltage range with optimized amplification. The selection circuit divides the input voltage range into segments and routes each segment to the appropriate sub-circuit, enabling both extended range and maintained accuracy through specialized processing for each segment.
Solution Approach 2:
The circuit dynamically selects different amplification paths based on the input voltage level. The selection circuit automatically adjusts which segmented sub-circuit is active depending on the instantaneous voltage value, providing adaptive amplification that optimizes accuracy for each specific voltage range while maintaining extended overall coverage.
2Measurement precision
If segmented sampling is implemented to improve sampling accuracy, then the sampling precision is improved, but the circuit complexity increases
Solution Approach 1:
Multiple segmented voltage conditioning sub-circuits are merged into a unified system with a common selection circuit. The selection circuit integrates the control logic for all segments, and the sub-circuits share common output routing, reducing overall complexity compared to completely separate sampling systems while maintaining segmented processing capabilities for improved accuracy.
3Adaptability or versatility
If segmented sampling is implemented to extend sampling range, then the applicable range is increased, but the circuit complexity increases
Solution Approach 1:
The voltage conditioning capability is segmented into multiple specialized sub-circuits, each optimized for specific voltage ranges. This segmentation enables extended applicable range by covering multiple decades of voltage levels, while the modular structure actually reduces complexity compared to a single circuit attempting to handle all ranges.
Solution Approach 2:
The segmented voltage conditioning circuit provides universal functionality across multiple voltage ranges. Each segmented sub-circuit can be selectively activated to handle different voltage magnitudes, making the overall system universally applicable to various sampling scenarios without requiring multiple separate circuits, thus extending range while managing complexity.
Data Source
AI summary
A signal conditioning circuit and a measurement device are provided. A selection circuit of the signal conditioning circuit outputs a first conduction signal when a voltage value of an input voltage signal is less than a threshold value of a voltage threshold signal, such that a first segmented voltage conditioning sub-circuit conditions, based on the received first conduction signal, the input voltage signal and outputs a first output voltage signal. The selection circuit outputs a second conduction signal when the voltage value of the input voltage signal is greater than the threshold value of the voltage threshold signal, such that the second segmented voltage conditioning sub-circuit conditions the input voltage signal and outputs a second output voltage signal.