Adjustable Resistor Bridge for Memory-Efficient Temperature Compensation
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Solution Overview
Problem
Conventional temperature adjustment methods for electronic devices require substantial memory storage to achieve accurate temperature compensation, especially for higher-order temperature coefficients, and often necessitate separate calibration of temperature sensors, which is inefficient and costly in terms of memory capacity and complexity.
Innovation Solution
A circuit arrangement featuring an adjustable resistor bridge with resistors of different temperature coefficients, coupled with an amplifier stage and scaler, allows for digital control of resistance values to adjust temperature sensitivity and offset, enabling efficient compensation of temperature-dependent signals without the need for extensive memory storage or separate temperature sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature look-up table adjustment method is used to improve temperature compensation accuracy, then measurement precision is improved, but device complexity increases due to substantial memory storage requirements
Solution Approach 1:
The patent changes the fundamental parameter from stored lookup tables to real-time calculation based on resistor temperature coefficients. Instead of storing pre-computed adjustment data in memory, the system uses the inherent temperature-dependent electrical parameters of resistors with different TCR values to dynamically generate compensation signals, eliminating the need for large memory structures while maintaining compensation accuracy
Solution Approach 2:
The patent replaces the memory-based electronic system with an analog/electrical system that uses resistor temperature characteristics. The mechanical/electronic storage function is substituted by the physical temperature-response behavior of resistors, where the temperature compensation is achieved through electrical parameter changes rather than retrieving stored data
2Measurement precision
If higher-order temperature coefficient adjustment is implemented to improve measurement precision, then measurement precision is improved, but device complexity increases due to substantial memory storage penalty
Solution Approach 1:
The patent implements higher-order temperature compensation by introducing resistors with different temperature coefficient hierarchies (first-order TCR, second-order TCR). These resistors naturally generate temperature-dependent voltage divisions that correspond to higher-order polynomial terms, enabling TCS2 and TCO2 adjustment without requiring additional memory storage for higher-order lookup tables
3Measurement precision
If more temperature points are added to the look-up table to improve measurement precision, then measurement precision is improved, but device complexity increases due to increased memory capacity
Solution Approach 1:
The patent enables the resistor bridge circuit to automatically adapt to temperature changes without external memory lookup. The resistors with different TCR values self-generate the appropriate temperature-dependent voltage divisions, and the control system reads the temperature sensor value and calculates compensation parameters in real-time, making the system self-adjusting without requiring pre-stored temperature point data
4Measurement precision
If temperature sensor calibration is performed separately to improve measurement precision, then measurement precision is improved, but device complexity increases due to additional calibration procedures
Solution Approach 1:
The patent merges the temperature sensor calibration function with the resistor bridge compensation circuit. The temperature sensor is integrated into the same circuit topology as the resistor bridge, allowing both components to be calibrated simultaneously through a unified digital control mechanism that adjusts both sensor readings and resistor compensation values in a coordinated manner, eliminating separate calibration procedures
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 reduces memory requirements and simplifies calibration, enabling precise temperature compensation with improved linearity and reduced complexity, while minimizing the impact of manufacturing tolerances in resistor values.
Implementation Method 1
The adjustable resistor bridge may include at least one resistor of a first resistor type having a first coefficient of resistance with respect to an environmental condition. The adjustable resistor bridge may include at least one resistor of a second resistor type having a second coefficient of resistance with respect to the environmental condition different from the first coefficient.
Data Source
AI summary
Various embodiments may provide a circuit arrangement. The circuit arrangement may include an adjustable resistor bridge configured to receive a driving signal from an electronic device, and further configured to generate one or more intermediate signals based on the driving signal. The circuit arrangement may also include an amplifier stage configured to generate an amplified signal based on the one or more intermediate signals, and a scaler configured to generate an output signal based on the amplified signal. The adjustable resistor bridge may include at least one resistor of a first resistor type having a first coefficient of resistance with respect to an environmental condition, and at least one resistor of a second resistor type having a second coefficient of resistance with respect to the environmental condition different from the first coefficient. A resistance of the first resistor type may be adjustable by a resistor stage digital control signal.