Nonvolatile Memory External Power Control for Voltage Drop Detection
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Solution Overview
Problem
Typical nonvolatile memory devices fail to reliably operate due to their inability to detect drops in supply voltage and control internal circuits accordingly, leading to potential instability and performance issues.
Innovation Solution
The implementation of an external power control method that determines whether to apply a second external voltage to a nonvolatile memory device based on a drop in the first external voltage, generating a flag signal and transferring voltage to an internal circuit to manage and discharge voltages effectively, ensuring stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the nonvolatile memory device uses external supply voltage without voltage drop detection capability, then the device structure is simple, but the device reliability deteriorates due to inability to control internal circuits according to voltage drops
Solution Approach 1:
The patent applies preliminary action by detecting voltage drops before they cause harmful effects. The detection circuit continuously monitors the external supply voltage and generates a detection signal when voltage drops below a threshold, enabling the control circuit to take preventive actions (blocking voltage application, discharging internal capacitors) before reliability issues occur.
Solution Approach 2:
The patent introduces an intermediary detection circuit and control circuit between the external supply voltage and the internal circuits. This intermediary layer monitors voltage conditions and mediates the power delivery by selectively blocking voltage application to the memory cell array through control signals, preventing direct exposure to harmful voltage drops.
2Productivity
If the device applies second external voltage (higher than first external voltage) to internal circuit, then the device can operate with higher performance, but the device becomes vulnerable to voltage drops causing instability
Solution Approach 1:
The patent applies dynamics by making the voltage application dynamic rather than static. The control circuit dynamically adjusts whether to apply the second external voltage to the memory cell array based on real-time detection signals. When voltage drops are detected, the control circuit dynamically blocks the voltage application, allowing the device to adapt its performance level to maintain stability.
Solution Approach 2:
The patent implements feedback by using the detection signal (generated from monitoring the external supply voltage) to control the application of the second external voltage. The detection circuit provides continuous feedback about voltage conditions, and the control circuit uses this feedback to adjust voltage application, creating a closed-loop system that maintains operational stability.
3Ease of operation
If the device does not detect voltage drops, then the device operation is simple, but voltage-related disruptions occur causing performance issues
Solution Approach 1:
The patent applies self-service by enabling the device to autonomously detect and respond to voltage drops without external intervention. The detection circuit automatically monitors voltage conditions and generates detection signals that trigger internal control actions, allowing the device to self-regulate its operation and prevent performance degradation from voltage-related disruptions.
Data Source
AI summary
An external power control method includes determining whether to apply a second external voltage to a first node according to a drop of a first external voltage; generating a flag signal according to a drop of the second external voltage when the second external voltage is applied to the first node; transferring a voltage of the first node to a second node in response to the flag signal; and discharging at least one voltage of an internal circuit connected to the second node in response to the flag signal.