RC-Based Circuit Calibration for Multipoint Accuracy
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Solution Overview
Problem
Traditional circuit calibration methods require additional circuit components for each calibration point, leading to increased cost and reliability issues, and traditional multipoint calibration systems are inefficient due to part-to-part variation and temperature sensitivity.
Innovation Solution
A circuit calibration system using a variable voltage source, an RC circuit, and an intelligence module to generate multiple calibration points with a single output line, allowing for multipoint calibration without additional voltage sources, by controlling a switch with a pulse signal to sample calibration points over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional multipoint calibration uses additional voltage sources for each calibration point, then measurement accuracy is improved, but device complexity and cost increase
Solution Approach 1:
A single voltage source is designed to perform multiple functions by generating multiple calibration voltages through an RC circuit and switch control mechanism, eliminating the need for separate voltage sources for each calibration point while maintaining measurement accuracy across multiple points
Solution Approach 2:
Multiple calibration voltage generation functions are merged into a single integrated circuit block that combines one voltage source, an RC circuit, and a switch controlled by the intelligence module, replacing what would traditionally require multiple separate voltage sources
2Adaptability or versatility
If traditional multipoint calibration uses more circuit components, then calibration coverage is improved, but reliability deteriorates
Solution Approach 1:
The single voltage source with RC circuit and switch control provides universal calibration capability across multiple points, achieving broad calibration coverage while using fewer components, thereby improving reliability by reducing the number of potential failure points
Solution Approach 2:
The intelligence module automatically controls the switch timing to generate different calibration voltages from the same voltage source, making the system self-sufficient and eliminating the need for external multiple voltage sources, thus improving reliability
3Measurement precision
If traditional calibration systems use multiple voltage sources, then calibration precision is improved, but cost increases
Solution Approach 1:
One voltage source is designed to provide multiple calibration voltages through time-controlled RC circuit charging, achieving multipoint calibration precision without the cost of purchasing and implementing multiple separate voltage sources
Solution Approach 2:
Different calibration voltages are generated by changing the timing parameters (on-time duration) of the switch control signal, allowing the same voltage source to produce different voltage levels through parameter variation rather than requiring multiple physical voltage sources
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
Achieves accurate and reliable multipoint calibration across a wide temperature range with minimal components, reducing cost and sensitivity to part-to-part variations, while enabling infinite calibration points and improved measurement accuracy.
Implementation Method 1
The variable voltage system includes an RC circuit having a time constant and connected to the output line, and a switch between the voltage supply and the RC circuit
Data Source
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AI summary
A circuit calibration system (100) can include a calibration voltage source (101), a calibration output line (103), and a variable voltage system (105) connected between the calibration voltage source (101) and the calibration output line (103). The variable voltage system (105) can be configured to provide a variable calibration voltage to the calibration output line (103).