Non-Volatile Memory Voltage Ramp Control for RC Signal Errors
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Solution Overview
Problem
Voltage signals in non-volatile memory operations may fail to reach their intended magnitude due to RC issues or signal line defects, leading to errors in memory operations.
Innovation Solution
A control circuit adjusts the ramp rate of the voltage signal during ramping up based on real-time voltage magnitude testing, ensuring it meets predefined criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed ramp rate is used for voltage signals, then the device complexity is reduced, but the reliability deteriorates due to RC issues and signal line defects preventing accurate voltage delivery
Solution Approach 1:
The patent implements a feedback mechanism where the control circuit monitors the actual voltage signal characteristics during ramping and dynamically adjusts the ramp rate to compensate for RC issues and signal line defects. This closed-loop control ensures accurate voltage delivery to memory cells while maintaining operation reliability.
Solution Approach 2:
The patent transitions from a static fixed ramp rate to a dynamic adjustable ramp rate that adapts to actual signal conditions. The control circuit modifies the ramp rate in real-time based on measured voltage characteristics, enabling reliable operation despite variations in signal line properties.
2Productivity
If the ramp rate is increased to compensate for signal delays, then the productivity is improved, but the manufacturing precision deteriorates due to inaccurate voltage delivery
Solution Approach 1:
The control circuit uses feedback to monitor actual voltage signal characteristics and adjusts the ramp rate dynamically. This allows the system to maintain precise voltage delivery even when operating at higher speeds, as the ramp rate is optimized in real-time based on measured signal conditions.
Solution Approach 2:
The patent changes the ramp rate parameter dynamically based on actual signal conditions rather than using a fixed value. This parameter adjustment enables the system to achieve both high speed operation and precise voltage delivery by adapting the ramp rate to match the specific characteristics of each operation.
3Manufacturing precision
If a lower ramp rate is used to ensure accurate voltage delivery, then the manufacturing precision is improved, but the productivity deteriorates due to slower memory operations
Solution Approach 1:
The patent employs dynamic ramp rate adjustment rather than a static low ramp rate. The control circuit increases the ramp rate when signal conditions permit, thereby maintaining voltage precision while improving operation speed. This dynamic approach eliminates the need to consistently use conservative low ramp rates.
Solution Approach 2:
The system changes the ramp rate parameter based on real-time signal characteristics, allowing it to operate at higher speeds when conditions allow while maintaining precision when needed. This adaptive parameter adjustment resolves the trade-off between speed and precision.
Data Source
AI summary
A non-volatile memory comprises a non-volatile memory structure that includes non-volatile memory cells. The non-volatile memory adjusts a ramp rate of a voltage signal applied to the non-volatile memory structure as part of a memory operation for the non-volatile memory cells. The adjusting the ramp rate is performed during the ramping up of the voltage signal and is based on voltage magnitude of the voltage signal at a particular time during the ramping up of the voltage signal.