Isolated IC Communication Self-Calibration for Temperature Drift
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Solution Overview
Problem
In isolated communication between integrated circuits, changes in the external environment, such as temperature, affect the capacitance of isolation devices, leading to data loss due to signal conversion issues, causing errors in data transmission and reception.
Innovation Solution
The implementation of a self-calibration mechanism where a microcomputer outputs instructions for integrated circuits to adjust the voltage change times of transmission signals and control hysteresis ranges, allowing processors to select optimal signal lines and perform edge time and hysteresis range controls to maintain accurate signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If isolation devices (capacitors) are used to prevent burning caused by voltage differences, then reliability is improved, but manufacturing precision deteriorates due to capacitance changes with temperature
Solution Approach 1:
The patent applies preliminary action by performing self-calibration before normal communication operations. The microcomputer outputs self-calibration instructions that cause integrated circuits to adjust voltage change times and hysteresis ranges in advance, compensating for capacitance variations before they affect data transmission accuracy.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting voltage change times and hysteresis ranges based on detected capacitance values. The integrated circuits modify these parameters in response to self-calibration instructions, adapting to temperature-induced capacitance changes and maintaining reliable communication.
2Reliability
If self-calibration operations are added to compensate for capacitance changes, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by enabling the microcomputer to serve multiple functions: normal communication control and self-calibration instruction generation. The integrated circuits also perform dual roles of data transmission and parameter adjustment, reducing the need for separate dedicated calibration hardware.
Solution Approach 2:
The patent implements self-service through automatic self-calibration where the communication system calibrates itself without external intervention. The microcomputer automatically generates calibration instructions, and the integrated circuits autonomously adjust their parameters based on detected capacitance values, eliminating manual calibration needs.
3Measurement precision
If voltage change times are adjusted to compensate for capacitance variations, then signal transmission accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The patent applies self-service by enabling the integrated circuits to automatically adjust voltage change times and hysteresis ranges in response to self-calibration instructions. The system performs parameter optimization autonomously based on detected capacitance values, eliminating the need for manual parameter tuning by operators.
Solution Approach 2:
The patent implements feedback through a closed-loop calibration process. The system detects capacitance values, compares them against reference values, and automatically adjusts voltage change times and hysteresis ranges based on the detected deviations, continuously optimizing signal transmission accuracy.
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
This solution effectively prevents and compensates for data loss by adapting to environmental changes, ensuring reliable communication performance and reducing component costs.
Implementation Method 1
the size of the peak signal is determined by current, capacitor capacitance, and a change in a voltage for a specific time due to a differential formula. However, the capacitance capacitor may change in response to changes in the external environment (e.g., temperature)
Implementation Method 2
the battery management system performs isolated communication using an isolation device (e.g., a transformer or a capacitor) due to the differences in voltage between battery modules
Data Source
AI summary
An apparatus for self-calibration in isolated communication is included. A plurality of integrated circuits perform isolated communication with respect to each other. A microcomputer is configured to output a self-calibration instruction to the plurality of integrated circuits when a predetermined condition is met or in response to at least one of a periodic instruction or an aperiodic instruction. A plurality of processors are respectively provided in a corresponding one of the plurality of integrated circuits. Each of the processors being configured to perform a self-calibration operation to transmission parts and receiving parts in the corresponding integrated circuit.