Dynamic Voltage Control for Reliable Semiconductor Devices
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Summary
Problems
Semiconductor devices powered by environmental energy harvesting face challenges in maintaining appropriate power-on conditions due to varying capacitance values and power generation capabilities, leading to issues with input voltage stability and energy supply timing.
Innovation solutions
Incorporating a voltage comparison circuit and a setting change circuit to adjust the power-on criterion voltage based on external settings, ensuring the semiconductor device can operate within the optimal voltage range matching the environmental power generation device's capabilities.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the capacitance value of the capacitor is increased to ensure sufficient energy storage, then the reliability of power supply is improved, but the time required for the input voltage to rise to the operating level increases
Why choose this principle:
The patent applies dynamics by making the power-on criterion voltage adjustable rather than fixed. The setting change circuit allows the power-on criterion voltage to be modified based on the actual capacitance value, enabling the system to adapt to different energy storage conditions. This dynamic adjustment resolves the contradiction by allowing fast power-on (higher voltage threshold) when capacitance is large and reliable power-on (lower voltage threshold) when capacitance is small.
Principle concept:
If the capacitance value of the capacitor is increased to ensure sufficient energy storage, then the reliability of power supply is improved, but the time required for the input voltage to rise to the operating level increases
Why choose this principle:
The patent changes the parameter of power-on criterion voltage to resolve the contradiction. By allowing this voltage threshold to be adjusted according to the capacitance value, the system can optimize the balance between power supply reliability and power-on speed. The setting change circuit implements this parameter change, enabling the semiconductor device to accommodate different capacitor configurations.
Application Domain
Data Source
AI summary:
Incorporating a voltage comparison circuit and a setting change circuit to adjust the power-on criterion voltage based on external settings, ensuring the semiconductor device can operate within the optimal voltage range matching the environmental power generation device's capabilities.
Abstract
An environmental power generation device outputs power generation charges to a power supply line to which a capacitor is connected. When a power generation voltage corresponding to a charging voltage for the capacitor is equal to or higher than an power-on criterion voltage, a voltage comparison circuit outputs a voltage detection signal. An internal circuit of a semiconductor device is powered on in response to the voltage detection signal. A setting change circuit switches the power-on criterion voltage in accordance with a setting input.