Cascaded Voltage Detection for Low-Power Multi-Threshold Sensing
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Solution Overview
Problem
In NAND flash systems, multiple voltage detectors are required to operate at different voltage levels, leading to significant power consumption as they remain always on, necessitating a solution to reduce power usage.
Innovation Solution
A voltage detection system where a first voltage detector controls the status of a second voltage detector, turning it off when the input voltage exceeds a certain level, thereby eliminating unnecessary voltage detection and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple voltage detectors are used to detect different voltage levels, then voltage detection accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic control of voltage detectors by enabling or disabling specific detectors based on detected voltage levels. The system transitions from a static state where all detectors are always on to a dynamic state where detectors are selectively activated, reducing power consumption while maintaining detection accuracy across different voltage ranges
Solution Approach 2:
The system employs periodic activation of voltage detectors based on voltage threshold crossings. Instead of continuous operation, detectors are activated only when needed (when voltage enters their detection range) and deactivated when voltage moves out of range, creating a periodic on-off pattern that reduces overall power consumption
2Adaptability or versatility
If multiple voltage detectors operate simultaneously, then comprehensive voltage monitoring is achieved, but device complexity increases
Solution Approach 1:
The patent implements feedback control where voltage detector outputs are fed back to control the enabling/disabling of other voltage detectors. This feedback mechanism automatically manages the complexity of coordinating multiple detectors, as the system self-regulates which detectors are active based on real-time voltage conditions, reducing the need for complex external control logic
Data Source
AI summary
A voltage detection system includes a first voltage detector and a second voltage detector. The first voltage detector is configured for detecting whether an input voltage reaches a first voltage level. The second voltage detector, coupled to the first voltage detector, is configured for detecting whether the input voltage reaches a second voltage level. The first voltage detector outputs a control signal to control a status of the second voltage detector according to a detection result of the first voltage detector.