Segmented Signal Conditioning Circuit for Wide-Range Voltage Sampling
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Solution Overview
Problem
Existing signal conditioning circuits face challenges with large input voltage ranges, leading to oversampling or insufficient sampling accuracy, and are complex and costly when using microcontrollers for segmented sampling.
Innovation Solution
A segmented selectable signal conditioning circuit with a segmented voltage threshold circuit, selection circuit, and segmented voltage conditioning circuit, utilizing multiple threshold sub-circuits and conditioning sub-circuits to condition input voltage signals based on comparison results, allowing for flexible and accurate voltage sampling across varied ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single amplification multiple is applied to the input voltage signal, then the circuit structure is simple, but the sampling accuracy is low and the applicable voltage range is limited
Solution Approach 1:
The patent divides the voltage sampling process into multiple segments by introducing multiple threshold sub-circuits that create different voltage thresholds. The selection circuit compares the input voltage against these segmented thresholds and routes the signal to different conditioning sub-circuits based on which threshold range the input falls into. This segmentation allows each sub-circuit to be optimized for its specific voltage range, thereby improving sampling accuracy across the entire voltage spectrum while maintaining reasonable circuit complexity through modular design.
2Measurement precision
If segmented sampling is controlled by a microcontroller, then the sampling accuracy can be improved, but the circuit complexity and cost increase
Solution Approach 1:
The patent implements self-service by designing the selection circuit to automatically determine which voltage threshold range the input signal falls into and autonomously route it to the appropriate conditioning sub-circuit. This eliminates the need for external microcontroller intervention, reducing circuit complexity and cost while maintaining segmented sampling accuracy. The circuit serves itself by using comparator logic to make routing decisions based on real-time voltage level detection.
3Adaptability or versatility
If the input voltage range is large, then the universality of the sampling circuit is improved, but the sampling accuracy decreases when the voltage is relatively large or small
Solution Approach 1:
The patent applies local quality by assigning different amplification multiples to different voltage threshold ranges. Each voltage conditioning sub-circuit is configured with specific amplification parameters optimized for its designated voltage range. For example, lower voltage ranges may use higher amplification factors to boost signal strength for accurate sampling, while higher voltage ranges use lower amplification to prevent saturation. This localized optimization ensures high sampling accuracy across the entire universal voltage range.
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 solution increases the applicable sampling range, improves accuracy and universality, and expands the scenarios where voltage sampling can be applied, optimizing voltage signal conditioning.
Implementation Method 1
each conduction signal of the X+1 conduction signals is output based on a comparison result between the input voltage signal and one of the X voltage threshold signals
Implementation Method 2
each of the X+1 segmented voltage conditioning sub-circuit is configured to condition the input voltage signal to output a corresponding output voltage signal
Data Source
AI summary
A segment selectable signal conditioning circuit and a measurement device are provided. The circuit outputs respective voltage threshold signals through various voltage threshold sub-circuits. The voltage threshold signals are preset to have different threshold values. Each segment voltage conditioning sub-circuit conditions the input voltage signal according to the corresponding conduction signal to obtain a corresponding output voltage signal. The selection circuit receives the input voltage signal and each voltage threshold signal, and compares the voltage value of the input voltage signal to the threshold value of each voltage threshold signal respectively, and outputs the corresponding conduction signal based on the comparison result to achieve segment selectable voltage signal conditioning.