Power Supply Circuit Voltage Fluctuation Control
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Solution Overview
Problem
Semiconductor devices face challenges in generating stable voltage levels due to delays in voltage transmission, leading to fluctuations in output voltage, which affects power supply stability and efficiency.
Innovation Solution
A power supply circuit with a voltage driving unit and a driving control unit that enables or disables the voltage driving unit based on divided voltage levels, using reference voltages to manage the output voltage and stabilize it by adjusting the driving of the output node accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the voltage driving unit continuously drives the output node to maintain output voltage, then the output voltage level is maintained, but voltage fluctuations occur due to transmission delays causing instability
Solution Approach 1:
The driving control unit predicts when voltage fluctuations will occur by monitoring the divided voltage and compares it with reference voltages before the actual fluctuation happens. This allows the control unit to preemptively adjust the voltage driving unit's operation, compensating for transmission delays and maintaining stable output voltage without continuous driving.
Solution Approach 2:
The patent implements a feedback mechanism where the divided voltage (which is a scaled version of the output voltage) is continuously monitored and fed back to the driving control unit. This feedback loop allows the system to detect voltage changes and adjust the voltage driving unit accordingly, maintaining power supply stability despite transmission delays.
2Reliability
If the voltage driving unit is continuously enabled to maintain output voltage, then voltage level is sustained, but power consumption increases
Solution Approach 1:
Instead of continuously enabling the voltage driving unit, the patent uses periodic action by enabling or disabling it based on comparisons between the divided voltage and reference voltages. The driving control unit adjusts the voltage driving unit's operation in periodic cycles, maintaining voltage levels only when necessary and reducing power consumption during stable periods.
3Stability of the object's composition
If the voltage driving unit is frequently adjusted to respond to voltage changes, then output voltage stability is improved, but device complexity increases due to additional control circuits
Solution Approach 1:
The patent segments the voltage control function into two parts: the voltage driving unit that physically adjusts voltage levels, and the driving control unit that monitors and controls when to activate the driving unit. This segmentation allows for simplified individual components while achieving overall voltage stability through their coordinated operation.
Data Source
AI summary
Provided is an electronic device including a power supply circuit. The power supply circuit includes: a voltage driving unit configured to pull-up drive an output node and generate an output voltage; and a driving control unit configured to receive the output voltage, disable the voltage driving unit from the time at which a divided voltage obtained by dividing the output voltage at a set ratio becomes higher than a first level, and enable the voltage driving unit from the time at which the divided voltage becomes lower than a second level, which is higher than the first level.