Feedback-Calibrated Voltage Generation for Stable Reference Levels
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Solution Overview
Problem
Existing voltage generation circuits face challenges in maintaining a uniform reference voltage level against external variations such as temperature and operation voltage fluctuations, which affects the stability of operation voltages in electronic devices.
Innovation Solution
A voltage generation circuit that includes an operation voltage driving circuit and a reference voltage calibration circuit, which generates a calibration reference voltage based on feedback voltage and reference voltage, using detection voltages and set values calculated from time-integrated level differences to adjust the calibration reference voltage in synchronization with a clock, ensuring stable operation voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reference voltage is used to generate operation voltages, then operation voltages can be generated at various levels, but the reference voltage level varies due to external variations such as temperature and operation voltage fluctuations
Solution Approach 1:
The patent implements a feedback mechanism where the reference voltage calibration circuit continuously monitors the reference voltage level and adjusts the calibration reference voltage based on detected deviations. The feedback voltage from the operation voltage driving circuit is compared with the reference voltage, and the difference is used to generate a calibration code that adjusts the calibration reference voltage, thereby maintaining stable reference voltage levels despite external variations.
Solution Approach 2:
The patent changes the parameter of the calibration reference voltage dynamically based on detected reference voltage deviations. By adjusting the calibration reference voltage level according to the calibration code generated from the feedback comparison, the system compensates for temperature and voltage fluctuations, maintaining stable operation voltage generation capability.
2Stability of the object's composition
If the calibration reference voltage is adjusted dynamically to maintain stable operation voltages, then reference voltage stability improves, but the circuit complexity increases due to additional calibration components
Solution Approach 1:
The patent merges the reference voltage calibration function with the existing operation voltage driving circuit by integrating the calibration reference voltage generator and detector within the same circuit architecture. The calibration process utilizes the existing feedback voltage and reference voltage comparison mechanisms, combining multiple functions into a unified circuit structure that reduces overall complexity.
Solution Approach 2:
The calibration circuit performs self-adjustment by automatically detecting reference voltage deviations and generating appropriate calibration codes without external intervention. The system uses its own internal resources - the feedback voltage, reference voltage comparator, and calibration reference voltage generator - to maintain stability, eliminating the need for complex external calibration equipment.
3Measurement precision
If the calibration process uses time-integrated detection of voltage level differences, then calibration precision improves, but the calibration time increases
Solution Approach 1:
The patent implements periodic sampling of the voltage level difference between the feedback voltage and reference voltage. The detector periodically compares these voltages and integrates the detected differences over time to generate the calibration code. This periodic action allows the system to accumulate precise measurement data while maintaining a controlled calibration节奏 that balances precision with time efficiency.
Data Source
AI summary
A voltage generation circuit includes an operation voltage driving circuit configured to drive an operation voltage based on a calibration voltage and a feedback voltage and generate the feedback voltage from the operation voltage. The voltage generation circuit also includes a reference voltage calibration circuit configured to generate the calibration reference voltage, wherein the calibration reference voltage varies based on a set value calculated according to the feedback voltage and a reference voltage.