Dual Operation Decoding Signal Circuit for SRAM Read Write
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Solution Overview
Problem
Conventional SRAM devices can only perform either a read or a write operation in one clock cycle, limiting their operational efficiency and speed due to the need for separate decoding signals and pulse widths for each operation.
Innovation Solution
A dual operation decoding signal circuit is developed that enables both read and write operations to be performed in a single clock cycle by generating and multiplexing read and write decoding signals, using dynamic latches and programmable tuning circuits to optimize pulse widths and prevent data overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate decoding signals and pulse widths are used for read and write operations, then each operation can be performed with optimal timing, but the SRAM device can only perform one operation per clock cycle, reducing productivity
Solution Approach 1:
The patent combines read and write decoding signal generation into a single integrated circuit that produces both decoding signals from one clock signal. The circuit merges the previously separate read pulse width generation and write pulse width generation functions into one unified structure, enabling both operations to be performed in the same clock cycle without requiring separate decoding signal paths.
Solution Approach 2:
The decoding signal generation circuit is designed as a universal multi-functional unit that can generate both read decoding signals and write decoding signals from a single clock input. This universal circuit performs multiple functions (read operation support and write operation support) that were previously required separate dedicated circuits, thereby increasing productivity while managing complexity.
2Productivity
If read and write operations are performed in the same clock cycle, then productivity increases, but data overlap and overwrite errors may occur
Solution Approach 1:
The patent segments the clock signal into distinct read pulse and write pulse time intervals within the same clock cycle. By dividing the clock cycle into separate temporal segments for read and write operations, the circuit prevents data overlap and ensures that read and write operations do not interfere with each other, maintaining data integrity while achieving higher productivity.
Solution Approach 2:
The circuit performs preliminary timing control by generating the read decoding signal before the write decoding signal within the same clock cycle. This preliminary action ensures that the read operation is completed and data is safely latched before the write operation begins, preventing write-then-read errors and ensuring proper data integrity through advance timing coordination.
3Speed
If pulse widths are optimized for each operation separately, then operation speed is maximized, but the cycle time increases when both operations are performed
Solution Approach 1:
The patent implements dynamic pulse width adjustment where the read pulse width and write pulse width are independently tunable parameters that can be optimized for each operation type. The circuit dynamically adjusts the timing of read and write operations within the clock cycle, allowing each operation to receive its optimal pulse width while the overall cycle time is managed through coordinated timing control, achieving both high speed and efficient cycle utilization.
Data Source
AI summary
A decoding signal circuit is configured to generate a dual operation decoding signal that enables a read operation and a write operation to be performed in one clock cycle. The decoding signal circuit is configured such that a read decoding signal and a write decoding signal are generated and multiplexed together to form the dual operation decoding signal. The memory device receives a read address and a write address consecutively in one cycle to generate the dual operation decoding signal. A single operation, such as a read only operation or a write only operation, can be performed as well as the dual operation of performing the read operation and the write operation in the same cycle.