Temperature Voltage Generator Linear Compensation Circuit
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Solution Overview
Problem
Conventional temperature voltage generators produce non-linear temperature voltage outputs, making accurate temperature measurement challenging due to varying change amounts with temperature changes.
Innovation Solution
A temperature voltage generator is designed with a control voltage generation circuit, a temperature voltage generation circuit, and a linear compensation circuit to improve linearity, using resistors, transistors, and switching signals to adjust resistances and reference voltages, thereby reducing secondary temperature components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional temperature voltage generation circuit is used, then the circuit structure is simple, but the temperature voltage output exhibits non-linear characteristics making accurate temperature measurement difficult
Solution Approach 1:
The temperature voltage generator is divided into three functional modules: control voltage generation circuit, temperature voltage generation circuit, and linear compensation circuit. Each module performs a specific function, allowing the complex task of linearization to be isolated and managed separately while maintaining overall system simplicity.
Solution Approach 2:
A linear compensation circuit is introduced as an intermediary component between the control voltage generation circuit and the temperature voltage generation circuit. This compensation circuit generates a compensation voltage that counteracts the non-linear components of the temperature voltage, thereby linearizing the overall output without fundamentally changing the simple structure of the main generation circuits.
2Manufacturing precision
If the temperature voltage generation circuit uses basic transistor and resistor configuration, then the manufacturing process is simple, but the linearity of temperature voltage output is poor
Solution Approach 1:
The linear compensation circuit changes the electrical parameters (voltage levels) dynamically based on temperature conditions. By adjusting the compensation voltage parameter in response to temperature changes, the circuit maintains linear temperature voltage output characteristics without requiring complex manufacturing processes or additional component types.
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
The improved linearity of the temperature voltage allows for more precise temperature measurement, as demonstrated by reduced quadratic terms and enhanced stability across different temperature ranges.
Implementation Method 1
a first transistor having a source and drain connected between the first resistor and a ground terminal and a gate to which a reference voltage is applied
Implementation Method 2
a second transistor having a source and drain connected between the second resistor and a ground terminal and a gate to which the control voltage is applied
Data Source
AI summary
A temperature voltage generator includes a control voltage generation circuit configured to receive a reference voltage and to output a control voltage that changes according to temperature, a temperature voltage generation circuit configured to amplify the control voltage and to output a temperature voltage that changes according to temperature, and a linear compensation circuit connected to the control voltage generation circuit and configured to improve the linearity of the temperature voltage.