Flash Memory Sense Amplifier Voltage Reduction
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Solution Overview
Problem
Existing sense amplifier circuits for flash memory systems require high operating voltages, leading to increased power consumption and complexity.
Innovation Solution
The use of localized boost circuits allows for lower operating voltages, reducing power consumption by comparing current or voltage measurements from a data block with a reference block to determine the value stored in the selected memory cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high operating voltages are used in sense amplifier circuits, then reading accuracy and performance requirements are met, but power consumption increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the operating voltage of the sense amplifier circuit based on the read operation requirements. The circuit transitions from a high-voltage state during normal operation to a lowered voltage state during read operations, thereby reducing power consumption while maintaining adequate reading accuracy through optimized circuit behavior at the reduced voltage level.
2Reliability
If high operating voltages are used in sense amplifier circuits, then performance requirements are met, but device complexity increases
Solution Approach 1:
The patent implements dynamics by making the sense amplifier circuit's operating voltage adjustable rather than fixed. The circuit can dynamically switch between different voltage levels (high voltage for normal operation, lowered voltage for read operations), allowing the same hardware to adapt to different performance requirements without adding significant complexity through software control or multiple fixed-voltage circuits.
Data Source
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AI summary
Numerous embodiments for an improved sense amplifier circuit for reading data in a flash memory cell are disclosed. The embodiments each compare current or voltage measurements from a data block with a reference block to determine the value stored in the selected memory cell in the data block. The use of one or more localized boost circuits allow the embodiments to utilize lower operating voltages than prior art sense amplifier circuits, resulting in reduced power consumption.