Active Start Judgment Circuit for Reliable Automatic Power-On
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Solution Overview
Problem
Conventional automatic start methods for electronic equipment, such as computers, often fail due to insufficient battery power or erroneous BIOS settings, as they rely on battery power rather than standby power, making it difficult to initiate a power-on sequence without user intervention.
Innovation Solution
An active start judgment circuit is introduced, which connects between the standby power unit and the main power unit in an AC/DC transforming power supply, generating a reference potential and comparing it with the standby power signal to output a start signal to the main power unit, enabling the equipment to start using the steady standby power even when the power supply is connected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conventional automatic start method using battery power is used, then the computer can be started automatically after power connection, but the start may fail due to insufficient battery power or erroneous BIOS settings
Solution Approach 1:
The patent introduces a standby power unit as an intermediary between the AC power source and the main power system. This standby power unit continuously provides a small amount of power to maintain a loading current, which serves as a reliable trigger signal for automatic startup. This intermediary approach eliminates the unreliability of battery power and BIOS settings by using a dedicated power pathway that is always active when AC power is connected.
Solution Approach 2:
The standby power unit performs preliminary action by continuously maintaining a loading current on the motherboard even when the system is in OFF state. This preliminary power supply ensures that the power management circuitry remains active and ready to trigger the main power system, eliminating the need for battery power or BIOS configuration and ensuring reliable automatic startup.
2Ease of operation
If user-triggered start signal is required, then the computer can be started with user control, but user intervention is needed which reduces convenience
Solution Approach 1:
The system performs self-service by automatically detecting the presence of AC power through the standby power unit and generating the necessary startup trigger signal without any user intervention. The standby power unit continuously maintains a loading current that automatically triggers the main power system when AC power is connected, making the system self-starting and eliminating the need for users to press power buttons or configure BIOS settings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures reliable and automatic power-on of electronic equipment by utilizing the continuous standby power, preventing start failures caused by battery power insufficiency and eliminating the need for user-triggered start signals or BIOS settings, thus providing a stable and convenient power-up mechanism.
Implementation Method 1
The power supply has at least one standby power unit to transform AC to DC in regular conditions
Implementation Method 2
a power signal is got from the standby power unit to be compared with the reference potential, then a start signal is output
Data Source
AI summary
An active start judgment circuit is electrically connected to an AC/DC transforming power supply which has at least one standby power unit to transform AC to DC in regular conditions and a main power unit to transform the AC to the DC in an ON condition for operation of an electronic equipment. The start judgment circuit bridges the standby power unit and the main power unit, and generates a reference potential based on a voltage output from the standby power unit, and gets a power signal from the standby power unit to be compared with the reference potential to output a start signal to the main power unit to transform the AC to the DC. Thus the standby power unit can actively drive the main power unit to supply DC power to activate the electronic equipment.