Power Source Switching Circuit for Stable Voltage Transitions
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Solution Overview
Problem
Electronic devices face instability and potential malfunction due to sudden changes in voltage supply, particularly when transitioning between different operating modes, necessitating a stable voltage output mechanism.
Innovation Solution
An electronic circuit comprising a power source switching circuit with a voltage detector and switch circuits that dynamically adjusts between multiple input voltages to maintain a stable output voltage, using a voltage regulator to stabilize the transition between voltage sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If voltage magnitude is changed according to operating mode to reduce power consumption, then power consumption is reduced, but voltage stability deteriorates causing instantaneous malfunction
Solution Approach 1:
The voltage detector circuit detects the input voltage level in advance before the voltage switching occurs. This preliminary detection allows the system to prepare for the voltage transition and ensure stable output voltage during mode changes, preventing instantaneous malfunction while enabling power consumption reduction through DVFS
Solution Approach 2:
The voltage detector circuit acts as an intermediary between the voltage input and the voltage output circuits. It monitors the input voltage level and generates control signals to switch between voltage output circuits, ensuring that the output voltage remains stable during transitions while allowing the system to operate at different power consumption levels
2Adaptability or versatility
If voltage level fluctuates during mode changes, then adaptability to different operating modes is improved, but circuit reliability deteriorates due to instantaneous malfunction
Solution Approach 1:
The voltage detector circuit continuously monitors the input voltage level and provides feedback control signals to the voltage output circuits. This feedback mechanism ensures that the output voltage adapts to different input voltage levels while maintaining stability, allowing the system to operate in different modes without causing instantaneous malfunction
Solution Approach 2:
The system dynamically switches between different voltage output circuits based on the detected input voltage level. This dynamic adaptation allows the system to respond to changing operating conditions while the control mechanism ensures that transitions occur smoothly without causing instantaneous malfunction, thus maintaining circuit reliability
Data Source
AI summary
Based on a first signal, a first voltage output circuit outputs a first output voltage which is based on a first voltage or does not output the first output voltage. Based on a second signal, a second voltage output circuit outputs a second output voltage which is based on a second voltage or does not output the second output voltage. When a level of the first voltage is lower than a reference level, a voltage detector circuit outputs the first signal such that the first voltage output circuit does not output the first output voltage and outputs the second signal such that the second voltage output circuit outputs the second output voltage. The second voltage output circuit outputs the second output voltage such that the second output voltage has a level of the first output voltage when the level of the first voltage is the reference level.