Voltage Generator With Segmented Power-Up Control
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Solution Overview
Problem
Semiconductor devices experience high peak current consumption during power-up operations, leading to inefficient energy use and potential malfunctions due to rapid voltage stabilization.
Innovation Solution
A voltage generator with a control signal generation unit that selectively activates a first voltage generation unit with weaker driving ability during power-up and switches to a second voltage generation unit after stabilization, reducing peak current by using the first unit for initial voltage generation and the second unit for subsequent stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single voltage generation unit with strong driving ability is used to rapidly generate the second power supply voltage during power-up, then the power-up speed is improved, but the peak current consumption is increased
Solution Approach 1:
The voltage generation function is segmented into two separate units: a first voltage generation unit with weak driving ability for the power-up phase, and a second voltage generation unit with strong driving ability for the steady-state phase. This segmentation allows each unit to be optimized for its specific operating phase, preventing the peak current consumption associated with using a strong unit throughout operation while maintaining fast power-up capability when needed.
Solution Approach 2:
The system dynamically switches between the first and second voltage generation units based on the operating phase. During power-up, the first unit is activated; after the second power supply voltage reaches a specific level, the control signal generation unit switches to the second unit. This dynamic switching optimizes energy consumption by using the weaker unit only when necessary for initial voltage generation.
2Device complexity
If a single voltage generation unit is used throughout operation, then the device complexity is reduced, but the energy efficiency during different operating phases cannot be optimized
Solution Approach 1:
The voltage generation system is divided into two separate units with different driving abilities, each optimized for specific operating phases. This segmentation enables energy efficiency optimization during power-up and steady-state operation, accepting increased structural complexity as a trade-off for significant energy savings.
Solution Approach 2:
The control signal generation unit provides multi-functionality by managing the switching between the two voltage generation units. It monitors the second power supply voltage level and activates the appropriate unit based on operating conditions, allowing the system to adapt its energy consumption characteristics to different operational requirements.
Data Source
AI summary
A voltage generator includes a first voltage generation unit and a second voltage generation unit suitable for generating a second power supply voltage using a first power supply voltage, and being selectively driven, and a control signal generation unit suitable for activating the first voltage generation unit until the second power supply voltage reaches a specific level and activating the second voltage generation unit after the second power supply voltage reaches the specific level. The first voltage generation unit has less driving ability than the second voltage generation unit.