Temperature Sensor Voltage-Temperature Curve Shift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional temperature sensors face challenges in detecting a wide range of temperatures due to limited voltage ranges and increased noise immunity and offset resistance issues when trying to extend their detectable range, which complicates circuit design.
Innovation Solution
A temperature sensor system that includes multiple temperature coefficient voltage generators, converters, and a variable voltage or current source, which generates different voltages or currents in different time periods to create shifted voltage-temperature curves, allowing for detection of high and low temperatures without altering the slope of the voltage-temperature curve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the slope of the voltage-temperature curve is decreased to extend the detectable temperature range, then the temperature detection range is improved, but the noise immunity and offset resistance become worse
Solution Approach 1:
The patent applies dynamics by making the voltage-temperature curve slope adjustable rather than fixed. The circuit can dynamically change the slope of the V-T curve according to different detection requirements, allowing optimal trade-off between temperature range and measurement precision at different operating conditions
Solution Approach 2:
The patent changes the electrical parameters (voltage levels, current values) of the temperature sensor circuit to modify the V-T curve characteristics. By adjusting these parameters, the slope of the curve can be optimized to achieve both wide detection range and sufficient noise immunity
2Measurement precision
If the voltage variation is increased to improve temperature detection sensitivity, then the temperature coefficient slope is improved, but the detectable temperature range becomes limited
Solution Approach 1:
The patent implements dynamic adjustment of the voltage-temperature curve characteristics. The circuit can switch between different operating modes with different V-T curve slopes, enabling high sensitivity detection within a specific range while maintaining the ability to detect broader temperature ranges when needed
Solution Approach 2:
The patent segments the temperature detection range into multiple zones, each with optimized V-T curve characteristics. Different voltage-temperature curves are used for different temperature ranges, allowing high sensitivity in specific zones while covering a wide overall range
Data Source
AI summary
A temperature sensor includes a plurality of temperature coefficient voltage generators, one or more converters and at least one variable voltage or current source. The temperature coefficient voltage generators are used for generating multiple temperature coefficient voltages. The converters, coupled to the temperature coefficient voltage generators, are used for converting the temperature coefficient voltages to digital values. The at least one variable voltage or current source, each coupled to at least one of the temperature coefficient voltage generators, includes a first variable voltage or current source for outputting a first voltage or current in a first time period, and outputting a second voltage or current in a second time period, wherein the second voltage or current is different from the first voltage or current such that there exists a shift between a first voltage-temperature curve in the first time period and a second voltage-temperature curve in the second time period.