Power-on detection circuit and chip

By adding an enable control circuit to the power-on detection circuit, the problem of chip startup failure or damage caused by misjudgment in the prior art is solved, achieving higher security and reliability.

CN122283376APending Publication Date: 2026-06-26GIGADEVICE SEMICON (BEIJING) INC +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GIGADEVICE SEMICON (BEIJING) INC
Filing Date
2024-12-25
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing power-on detection circuits are prone to misjudgment, which can cause the chip to fail to start normally or suffer irreversible damage, affecting the chip's safety and operational reliability.

Method used

An enable control circuit is added before the voltage divider circuit. The enable control signal is output only after the power supply voltage reaches the first threshold to enable the voltage divider circuit, thus avoiding misjudgment by the comparator circuit caused by the voltage divider circuit's establishment speed being equal to or faster than the reference voltage's establishment speed.

Benefits of technology

It improves the safety and reliability of chip power-on, avoids problems such as chip failure to start or damage due to misjudgment, and the circuit design is simple and easy to implement.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a power-on detection circuit and a chip. An enable control circuit is added before the voltage divider circuit. During chip power-on, the enable control circuit outputs an enable control signal to enable the voltage divider circuit only after the power supply voltage reaches a first threshold. This avoids the problem of misjudgment by the comparator circuit due to the voltage divider circuit's voltage division establishment speed being equal to or faster than the reference voltage establishment speed. Thus, during chip power-on, problems such as the chip failing to start normally or irreversible damage caused by the output of the power-on detection circuit being incorrectly flipped can be avoided, thereby improving the chip's power-on safety and operational reliability.
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