RAM Pre-Charge Voltage Switching for Read and Write Accuracy
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Solution Overview
Problem
The existing pre-charge voltage in memory systems does not adequately ensure the charges in storage capacitors during writing operations, leading to inaccurate data reading.
Innovation Solution
A pre-charge voltage generation circuit that selectively provides two voltages: a first voltage for reading and a second voltage for writing, ensuring accurate charge levels in storage capacitors by adjusting the pre-charge voltage based on operation commands and temperature signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pre-charge voltage is used for both reading and writing operations, then the circuit structure remains simple, but the charge accuracy in storage capacitors during writing operations deteriorates
Solution Approach 1:
The pre-charge voltage is segmented into two distinct voltage levels: a first pre-charge voltage for reading operations and a second pre-charge voltage for writing operations. This segmentation allows each voltage to be optimized for its specific function, with the second voltage providing more adequate charging for write operations while the first voltage maintaining standard operation for reads, thereby resolving the contradiction between circuit simplicity and charge accuracy.
Solution Approach 2:
The pre-charge voltage is made dynamic by selecting different voltage levels based on the operation type (read or write). The circuit dynamically switches between the first and second pre-charge voltages according to operational requirements, allowing the system to adapt the charge level to the specific task at hand, thus improving write operation accuracy without permanently complicating the circuit structure.
2Manufacturing precision
If the pre-charge voltage is increased to ensure adequate charges during writing operations, then writing accuracy improves, but reading operation accuracy deteriorates due to excessive charges
Solution Approach 1:
Different pre-charge voltage qualities are applied locally to different operational contexts: the second (higher) pre-charge voltage is applied specifically to writing operations where adequate charging is critical, while the first (standard) pre-charge voltage is applied to reading operations where precise measurement is paramount. This local differentiation resolves the contradiction by ensuring each operation receives the appropriate voltage quality for its specific requirements.
Solution Approach 2:
The pre-charge voltage parameter is changed based on the operation type. For writing operations, the voltage parameter is set to the second level to ensure adequate charging and improve write accuracy. For reading operations, the voltage parameter is set to the first level to maintain precise measurement capability. This parameter change strategy allows the system to optimize for writing accuracy when needed while preserving reading accuracy during read operations.
Data Source
AI summary
Pre-charge voltage generation circuit for a random memory and a random memory are provided. The pre-charge voltage generation circuit is configured to selectively provide a pre-charge voltage and includes: a voltage generation module, configured to generate a first voltage and a second voltage, wherein either of the first voltage and the second voltage serves as the pre-charge voltage, the first voltage is greater than the second voltage; a selection module, coupled to the voltage generation module, configured to select and output the second voltage as the common end voltage of the storage capacitor of the random memory in response to an operation command being a write command, and configured to select and output the first voltage as the common end voltage in response to the operation command being a read command.