Voltage Reference Circuit With Temperature-Selective Compensation
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Solution Overview
Problem
High precision electronic circuits require more than first-order and second-order temperature compensation for stable DC reference voltages, as existing compensation methods are insufficient in maintaining voltage stability across varying operational temperatures.
Innovation Solution
A voltage reference circuit with a compensation controller that activates and deactivates specific compensation circuits based on temperature thresholds, using a pair of transistors and an amplifier to produce a reference voltage with precise temperature compensation by adjusting currents through different current paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If first-order and second-order temperature compensation are applied in related art voltage reference circuits, then temperature stability is improved to some extent, but manufacturing precision is insufficient for high precision circuits requiring accuracy better than 0.1%
Solution Approach 1:
The temperature compensation function is segmented into multiple independent compensation circuits, each targeting specific temperature ranges or compensation orders. The circuit includes first-order compensation circuits and second-order compensation circuits that can be selectively activated based on temperature conditions, allowing precise control over compensation accuracy without requiring all circuits to operate simultaneously at full precision.
Solution Approach 2:
The compensation circuits are designed with dynamic activation and deactivation capabilities based on operating temperature thresholds. Temperature sensing mechanisms dynamically enable or disable specific compensation circuits according to current temperature conditions, optimizing compensation precision across different temperature ranges while maintaining overall system accuracy better than 0.1%.
2Stability of the object's composition
If multiple compensation circuits are activated simultaneously to achieve high precision, then voltage stability is improved, but device complexity increases
Solution Approach 1:
The system dynamically activates or deactivates specific compensation circuits based on temperature thresholds and operating conditions. Temperature sensing elements monitor the operating temperature and selectively enable only the necessary compensation circuits for current conditions, maintaining voltage stability while avoiding the complexity of having all circuits permanently active or intricately interconnected.
Solution Approach 2:
Specific compensation functions are extracted into separate, independently controllable circuits rather than being integrated into a single complex compensation system. This allows individual compensation circuits to be activated or deactivated based on temperature ranges, reducing overall system complexity while maintaining stability through selective engagement of appropriate compensation mechanisms.
Data Source
AI summary
Methods, systems, and apparatuses for producing a compensated voltage reference. The method includes operating a voltage reference circuit. The method also includes activating a first compensation circuit when an operating temperature is less than or equal to a first temperature threshold. The first compensation circuit is configured to extract a first compensation current from the voltage reference circuit. The method further includes deactivating the first compensation circuit when the operating temperature is greater than the first temperature threshold. The method also includes activating a second compensation circuit when the operating temperature is greater than or equal to a second temperature threshold. The second compensation circuit is configured to extract a second compensation current from voltage reference circuit. The second temperature threshold is greater than the first temperature threshold. The method further includes deactivating the second compensation circuit when the operating temperature is less than the second temperature threshold.