Temperature Sensor With Dynamic ADC Range Calibration
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Solution Overview
Problem
Existing temperature sensors require complex calibration circuitry and are limited to specific temperature ranges with fixed sensitivity, making them inadequate for varying temperature environments.
Innovation Solution
A temperature sensor system comprising a temperature sensing unit, an analog-to-digital converter (ADC), a calibration unit, and a memory unit that adjusts ADC output ranges to match different temperature ranges, allowing for variable sensitivity and precise temperature measurement across multiple ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If prior art temperature sensor uses fixed sensitivity design, then it can maintain linearity in a particular temperature range, but it cannot be applicable for various temperature ranges
Solution Approach 1:
The patent implements variable sensitivity by dynamically selecting different ADC output ranges based on the detected temperature range. The calibration unit adjusts the ADC output range correlation according to the actual temperature being measured, transforming a static fixed-sensitivity design into a dynamic adaptive system that optimizes measurement precision for different temperature conditions without requiring multiple physical sensors
Solution Approach 2:
The patent changes the ADC output range parameter based on the temperature range being measured. The calibration unit stores multiple ADC output range correlations in memory and selects the appropriate correlation based on the current temperature range, effectively changing the sensitivity parameter adaptively. This allows the same hardware to achieve different sensitivity levels for different temperature ranges without additional calibration circuitry
2Adaptability or versatility
If prior art temperature sensor uses fixed ADC output range, then it has fixed sensitivity, but it cannot achieve variable sensitivity for different temperature ranges
Solution Approach 1:
The system dynamically adjusts the ADC output range based on the detected temperature range. When measuring lower temperatures, a smaller ADC output range is selected for higher precision, while for higher temperatures, a larger range is selected to maintain optimal precision across the full measurement spectrum
Solution Approach 2:
The calibration unit changes the ADC output range parameter according to the temperature range being measured. By storing multiple ADC output range correlations in memory and selecting the appropriate one based on the current temperature, the system achieves variable sensitivity that optimizes measurement precision for different temperature conditions
Data Source
AI summary
A temperature sensor is provided. The temperature sensor includes: a temperature sensing unit for sensing a temperature and outputting a temperature sensing signal; an analog-to-digital converter (ADC), coupled to the temperature sensing unit, for converting the temperature sensing signal to a digital value, having an ADC output range; a calibration unit, coupled to the ADC, for correlating the ADC output range with at least one temperature range; a memory unit, coupled to the calibration unit, recording the ADC output range, and the at least one temperature range, and the correlation therebetween.