Offset Correction Circuit With Opposing Temperature Coefficients
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing offset correction circuits face challenges in suppressing temperature drift and are costly due to the use of temperature-dependent elements like voltage sources and resistive elements.
Innovation Solution
An offset correction circuit with first and second correction voltage generation circuits, where the first correction voltage has a temperature coefficient that is reverse in polarity to the second, allowing for temperature drift suppression by using temperature-dependent elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature-independent voltage sources and resistive elements are used to suppress temperature drift, then offset voltage correction accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent changes the temperature dependency parameter of the correction voltages by generating two correction voltages with opposite temperature coefficients. Instead of using expensive temperature-independent elements, the invention utilizes temperature-dependent elements configured to produce correction voltages whose temperature drifts cancel each other out, thereby resolving the contradiction between accuracy and manufacturing cost.
2Stability of the object's composition
If temperature-independent elements are used for offset correction, then temperature drift suppression is achieved, but device complexity increases
Solution Approach 1:
The invention changes the temperature coefficient parameter of correction voltages to be opposite in polarity while maintaining the same magnitude. This allows the use of standard temperature-dependent elements in a configured arrangement that produces temperature drift suppression through parameter cancellation, avoiding the need for complex temperature-independent elements.
Data Source
AI summary
A first correction voltage generation circuit provides a first positive or negative correction voltage for correcting an input voltage. A second correction voltage generation circuit provides a second correction voltage identical in polarity to the first correction voltage in accordance with the first correction voltage. The second correction voltage is generated to have a temperature coefficient reverse in polarity to a temperature coefficient of the first correction voltage.