Negative Differential Transconductance Memory Read Circuit
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Solution Overview
Problem
Conventional flash memory cells require multiple read operations to accurately read data, especially when using Multi Level Cell (MLC) methods, which decreases data processing speed and increases complexity.
Innovation Solution
A method and apparatus that utilize a semiconductor device with negative differential transconductance to determine if a received voltage value falls within a specific voltage range during a one-time read operation, allowing for efficient data reading by mapping the voltage range to a data value, thereby reducing the number of required read operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple read operations are used to read data from memory cells, then data reading accuracy is improved, but data processing speed deteriorates
Solution Approach 1:
The patent segments the voltage range into multiple specific voltage ranges, each corresponding to different data values. By using a semiconductor device with negative differential transconductance, the system can determine which voltage range the received voltage falls into through a single read operation, eliminating the need for multiple sequential read operations while maintaining accurate data reading.
2Reliability
If multiple read operations are performed to read data accurately, then data reading reliability is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameter of the semiconductor device by utilizing its negative differential transconductance characteristic. This parameter change enables the device to directly determine whether the received voltage value falls within specific voltage ranges through a single operation, thereby maintaining reliable data reading while reducing circuit design complexity compared to multiple read operation approaches.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances data processing speed and reduces the complexity of circuit design by enabling data reading in a single operation, improving efficiency and resource utilization.
Implementation Method 1
a semiconductor device having negative differential transconductance
Data Source
AI summary
In reading data from a memory cell, a determining circuit determines whether a received voltage value is within at least one first voltage range through a one-time read operation using a semiconductor device that senses an output current corresponding to the received voltage value. The at least one first voltage range includes a first upper limit voltage value and a first lower limit voltage value. A data value of the memory cell is set as a first data value when the received voltage value is within the specific voltage range.