Power-Up Delay Circuit for Stable Supply Voltage Initialization
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Solution Overview
Problem
Existing electronic devices face challenges in maintaining stable supply voltage during initialization, which can lead to improper power up sequences and device malfunction.
Innovation Solution
The electronic device incorporates a power up circuit, a delay circuit, and multiple power supply circuits. The power up circuit controls a power up signal based on the power voltage, while the delay circuit generates enable signals with different delay times to activate the power supply circuits sequentially, preventing simultaneous activation and maintaining voltage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple power supply circuits are activated simultaneously during initialization, then the device can start all power supply functions at once, but large current spikes occur and supply voltage becomes unstable
Solution Approach 1:
The power-up circuit generates a power-up signal that activates power supply circuits in a predetermined sequence rather than simultaneously. The delay circuit introduces different delay times for each power supply circuit, ensuring that circuits are activated in a controlled order before the entire system is fully operational, preventing current spikes and voltage instability.
2Reliability
If power supply circuits are activated sequentially with delay circuits, then supply voltage remains stable, but the initialization process takes longer
Solution Approach 1:
The power-up circuit and delay circuit work together to activate power supply circuits in a predetermined sequence with different delay times. This preliminary ordered activation ensures that each circuit is ready before the next one activates, maintaining voltage stability while minimizing the total initialization time through optimized delay values.
Data Source
AI summary
An electronic device and an operating method thereof are provided. The electronic device comprises a power up circuit, a delay circuit, and a plurality of power supply circuits. The power up circuit is configured to control a power up signal according to a power voltage. The delay circuit is configured to provide a plurality of enable signals by delaying the power up signal with different delay times. The plurality of power supply circuits are configured to be respectively activated by the plurality of enable signals.