Reference Voltage Generation Circuit for Battery Voltage Detection
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Solution Overview
Problem
Existing battery voltage detection systems face challenges in stabilizing digital measurement signals due to temperature characteristics of reference voltages and analogue/digital converters, leading to precision issues in analogue/digital conversion.
Innovation Solution
A system that includes a reference voltage generation circuit designed to compensate for temperature characteristics of the analogue/digital converter and other preceding circuits, using adjustable resistors and diode circuits to stabilize the reference voltage, ensuring it negates the temperature effects across the entire conversion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional reference voltage generation circuit is used in the analogue/digital converter, then the conversion process is simple, but the digital measurement signal varies due to temperature characteristics of the reference voltage
Solution Approach 1:
The patent applies parameter changes by adjusting the resistance values of variable resistors R2 and R3 in the reference voltage generation circuit to modify the temperature characteristics of the reference voltage. By changing the resistance parameters, the reference voltage's temperature drift is compensated to match the temperature characteristics of the amplifier and A/D converter, thereby stabilizing the digital measurement signal without requiring complex additional circuits.
Solution Approach 2:
The patent implements feedback by using the temperature characteristics of the reference voltage to compensate for temperature drift in the amplifier and A/D converter. The reference voltage generation circuit continuously adjusts its output based on temperature variations, creating a feedback mechanism that stabilizes the overall measurement system's temperature characteristics and maintains conversion precision across different temperatures.
2Stability of the object's composition
If the reference voltage is stabilized to compensate for temperature characteristics, then the digital measurement signal stability improves, but the reference voltage generation circuit becomes more complex
Solution Approach 1:
The patent uses parameter changes by incorporating variable resistors R2 and R3 that can be adjusted to optimize the temperature characteristics of the reference voltage. This allows the circuit to achieve stable digital measurement signals across temperature variations while maintaining a relatively simple circuit structure through controlled parameter adjustment rather than complex circuit architecture.
Solution Approach 2:
The reference voltage generation circuit performs self-service by automatically compensating for temperature drift in the amplifier and A/D converter through its own temperature characteristics. The circuit uses its internal variable resistors to adjust and match the temperature behavior of other components, enabling self-stabilization without requiring external complex control systems.
3Measurement precision
If variable resistors are used to adjust temperature characteristics, then the precision of voltage detection improves across different temperatures, but the ease of manufacture decreases
Solution Approach 1:
The patent applies parameter changes by using variable resistors R2 and R3 that can be adjusted during manufacturing or calibration to match the temperature characteristics of specific amplifier and A/D converter components. This approach allows for high measurement precision across temperature ranges while providing flexibility in manufacturing - the variable resistors can be set during production to match specific component variations, facilitating customization without requiring entirely different circuit designs.
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 configuration stabilizes the temperature characteristic of digital measurement signals from the analogue/digital converter, enhancing the precision of analogue/digital conversion and improving the accuracy of battery voltage detection.
Implementation Method 1
the reference voltage generation circuit is configured to cause the reference voltage to have such a temperature characteristic as to compensate for all of temperature characteristics of at least the amplifier, the analogue/digital converter, and the reference voltage generation circuit
Data Source
AI summary
An analogue measurement data detection system according to the present invention includes: a reference voltage generation circuit configured to generate and output a reference voltage; an analogue/digital converter configured to compare an analogue signal with the reference voltage outputted from the reference voltage generation circuit, and based on a differential voltage between the analogue signal and the reference voltage, generate and output a digital signal corresponding to the analogue signal. The reference voltage generation circuit is configured to cause the reference voltage to have such a temperature characteristic as to compensate for temperature characteristics of at least the analogue/digital converter and the reference voltage generation circuit.