Voltage Detector Gating for Low-Power NAND Flash Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In NAND flash systems, multiple voltage detectors are required to operate efficiently, but they consume a significant amount of power and are always active, leading to a need for improved power management.
Innovation Solution
A voltage detection system where a higher voltage detector controls lower voltage detectors to turn off when the power supply voltage exceeds a certain threshold, reducing unnecessary power consumption by disabling detectors when the voltage is above 2.0V, and enabling them when it falls below 2.0V, using a control signal and latch signals to manage the status of the detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple voltage detectors are always on to ensure accurate voltage detection, then voltage detection reliability is improved, but power consumption increases
Solution Approach 1:
The voltage detection system dynamically adjusts the operational state of voltage detectors based on current voltage conditions. When voltage exceeds 2.0V, the system turns off lower voltage detectors (1.6V and 1.8V) to save power while maintaining the 2.0V detector active. When voltage drops below 2.0V, the system reactivates the lower voltage detectors. This dynamic on/off switching resolves the contradiction by adapting detector activity to actual system needs.
Solution Approach 2:
The system uses latch signals to preliminarily prepare the state of voltage detectors before actual voltage changes occur. The latch circuit anticipates voltage transitions and pre-configures detector states, ensuring that detectors are already in the correct operational mode when voltage changes happen, thus maintaining detection reliability without requiring all detectors to remain continuously active.
2Adaptability or versatility
If all voltage detectors remain active to monitor voltage levels, then detection coverage is improved, but device complexity increases
Solution Approach 1:
The voltage detection system is segmented into independent voltage detectors operating at different voltage levels (1.6V, 1.8V, and 2.0V). Each detector operates independently but is controlled by a centralized control signal generation circuit. This segmentation allows the system to activate only the necessary detectors for current voltage conditions, reducing overall system complexity while maintaining comprehensive detection coverage across different voltage ranges.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A voltage detection system(10) includes a first voltage detector(102) and a second v-oltage detector(104). The first voltage detector(102) is configured for detecting whet-her an input voltage reaches a first voltage level. The second voltage detector(104) coupled to the first voltage detector(102) is configured for detecting whether the inp-ut voltage reaches a second voltage level. The first voltage detector(102) outputs a control signal to control the status of the second voltage detector(104) according to t-he detection result of the first voltage detector(102).