Multi-Slope Reference Voltage Generator for Wide Temperature Range
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Solution Overview
Problem
Existing voltage generators struggle to maintain optimal power supply voltage across a wide range of temperatures, affecting the functionality of digital and analog circuits, as their reference voltages do not adequately adjust to ensure proper operation at varying temperatures.
Innovation Solution
An electronic circuit with a reference voltage generator comprising first and second candidate circuits and a selector circuit, which generates and selects reference voltages that change differently with temperature, ensuring a power supply voltage that compensates for temperature-induced changes, thereby maintaining circuit functionality across a broader temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single reference voltage generator is used, then the circuit structure is simple, but the power supply voltage cannot maintain optimal levels across a wide temperature range
Solution Approach 1:
The reference voltage generator is divided into multiple candidate circuits (first candidate circuit, second candidate circuit), each optimized for different temperature ranges. This segmentation allows each circuit to specialize in specific temperature conditions, improving overall temperature adaptability while managing complexity through modular design
Solution Approach 2:
The system dynamically switches between different candidate circuits based on temperature conditions. The selector circuit activates the appropriate candidate circuit according to the current temperature, enabling the reference voltage generator to adapt its characteristics to match environmental conditions, thus extending operational range
2Reliability
If the reference voltage changes significantly with temperature, then the power supply voltage can compensate for temperature effects, but the voltage variation may cause circuit malfunction
Solution Approach 1:
The system changes the reference voltage parameters (magnitude and temperature coefficient) by selecting different candidate circuits based on temperature. Each candidate circuit provides different voltage parameters optimized for its temperature range, allowing the system to maintain reliability across varying temperatures while preventing voltage-induced malfunction
Solution Approach 2:
The selector circuit monitors temperature conditions and provides feedback to determine which candidate circuit should be active. This feedback mechanism ensures the reference voltage remains within appropriate ranges for circuit reliability while compensating for temperature-induced variations
Data Source
AI summary
An electronic circuit is disclosed. The electronic circuit includes a reference voltage generator, which includes a first candidate circuit configured to generate a first candidate reference voltage, a second candidate circuit configured to generate a second candidate reference voltage, and a selector circuit configured to select one of the first and second candidate reference voltages. The reference voltage generator also includes a third circuit configured to generate a power supply voltage based on the selected candidate reference voltage.