Semiconductor Memory Sense Amplifier Dynamic Voltage Control
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Solution Overview
Problem
Semiconductor memory devices face challenges in reducing power consumption while maintaining high data storage speed, as existing technologies often result in increased power usage during data storage operations.
Innovation Solution
The semiconductor memory device incorporates a sense amplifier control circuit and a driving voltage providing circuit that generate and manage sense amplifier driving voltages based on active and precharge signals, disabling the sense amplifier during the last write command to float the bit lines, thereby reducing power consumption and enhancing data storage speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the sense amplifier is continuously enabled during write operations, then data storage speed is maintained, but power consumption increases
Solution Approach 1:
The sense amplifier's operating state is dynamically adjusted based on the write operation sequence. The sense amplifier is enabled during write operations 1 to N-1 and disabled during write operation N, allowing the system to adapt its power consumption characteristics to the operational context while maintaining data storage functionality
Solution Approach 2:
The driving voltage applied to the sense amplifier is changed based on the write operation stage. During write operations 1 to N-1, the sense amplifier receives full driving voltage for optimal performance. During write operation N, the driving voltage is reduced or removed, disabling the sense amplifier and thereby reducing power consumption
2Loss of energy
If the sense amplifier is disabled to reduce power consumption, then energy efficiency improves, but data storage speed may be affected
Solution Approach 1:
The sense amplifier is periodically enabled and disabled in sync with the write operation sequence. It is enabled during write operations 1 to N-1 for data storage, and disabled during write operation N, creating a periodic pattern of operation that balances energy efficiency with data storage speed requirements
Solution Approach 2:
The sense amplifier is enabled in advance during write operations 1 to N-1 to prepare for potential data storage needs. This preliminary enabling ensures that when data storage is required, the sense amplifier is already active and ready, maintaining speed performance while allowing for controlled disabling during the final write operation
Data Source
AI summary
A semiconductor memory device includes a sense amplifier control circuit configured to generate a first sense amplifier driving voltage application signal, a second sense amplifier driving voltage application signal and a third sense amplifier driving voltage application signal in response to an active signal, a precharge signal and a write pulse; and a sense amplifier driving voltage providing circuit configured to provide driving voltages to a sense amplifier through first and second driving voltage application lines during enable periods of the first to third sense amplifier driving voltage application signals.