Temperature Sensor Voltage Variation Elimination
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Solution Overview
Problem
Existing temperature sensing devices face accuracy issues due to voltage variations in the power source, which can be complex to correct, increasing design complexity.
Innovation Solution
A temperature sensing device and method that utilize a sensor to generate two distinct sensing results based on different conditions, with an analog-to-digital converter dividing these results to eliminate voltage variations and produce an accurate digital code value without the need for additional correction units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage correction is performed through a temperature correction unit, then temperature sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extracts the voltage variation effect from the temperature sensing process by separating it into a distinct compensation signal generation path. The compensation unit generates a signal that specifically counteracts voltage variations, removing this error source without requiring complex correction circuits throughout the entire sensing system.
Solution Approach 2:
The patent introduces a compensation unit as an intermediary element that mediates between the power source variations and the temperature sensing circuit. This unit generates compensation signals that are combined with the sensing signal, acting as a buffer that eliminates voltage variation effects without directly modifying the core sensing mechanism.
2Measurement precision
If additional temperature correction means are added, then temperature sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the voltage compensation function with the existing temperature sensing circuitry by integrating the compensation unit into the signal processing path. The compensation signals are combined with the sensing signals in a unified processing architecture, eliminating the need for separate correction mechanisms and reducing overall system complexity.
Solution Approach 2:
The compensation unit is designed to perform multiple functions: it compensates for voltage variations, maintains sensing accuracy, and integrates with the existing signal processing architecture. This multi-functional design eliminates the need for additional dedicated correction circuits, reducing device complexity while maintaining improved accuracy.
Data Source
AI summary
A temperature sensing device and a temperature sensing method are provided. The temperature sensing device includes a sensor and an analog-to-digital converter. The sensor generates a first sensing result corresponding to an ambient temperature based on a first condition and generates a second sensing result corresponding to the ambient temperature based on a second condition. The second sensing result is different from the first sensing result. The analog-to-digital divides the first sensing result and the second sensing result to obtain a quotient value and generates an output digital code value corresponding to the ambient temperature according to the quotient value.