Memory Driving Circuit Temperature-Adaptive Overdriving
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Solution Overview
Problem
Existing driving circuits for memory systems consume unnecessary power due to overdriving operations performed regardless of temperature conditions, which is a concern for low power consumption requirements.
Innovation Solution
A driving circuit and method that selectively enables overdriving operations based on a temperature flag, generating an overdriving signal only under specific temperature conditions to provide a boosted voltage to the bit line sense amplifier, thereby minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If overdriving operation is performed in all operation circumstances, then data retention/write characteristics are improved, but unnecessary power consumption is caused
Solution Approach 1:
The patent applies dynamics by making the overdriving operation adjustable rather than fixed. The sense amplifier controller dynamically selects between normal and overdriving operations based on temperature conditions detected by the temperature sensor, allowing the system to adapt its power consumption and performance characteristics to match environmental conditions.
Solution Approach 2:
The patent changes the operating parameter (voltage level for sense amplifier) based on temperature conditions. When temperature is below a reference threshold, the sense amplifier operates in overdriving mode with higher voltage to improve data retention; when temperature is above the threshold, it operates in normal mode with standard voltage to reduce power consumption.
2Reliability
If overdriving operation is performed continuously, then data storage characteristic is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic monitoring of temperature conditions through the temperature sensor, which continuously or periodically detects temperature and generates temperature flags. Based on these periodic temperature assessments, the sense amplifier controller periodically switches between overdriving and normal operations, ensuring data storage characteristics are maintained only when necessary while minimizing energy loss during normal operations.
Data Source
AI summary
A driving circuit includes a write operation controller configured to generate a write control signal according to a write command and a column address; a row controller configured to generate an auto refresh flag according to an auto refresh command and a row address; and a sense amplifier controller configured to enable the write control signal or the auto refresh flag according to a temperature flag, and generate an overdriving signal according to the enabled write control signal or the enabled auto refresh flag.