Memory Device Data Output Controller Clock Signal Timing
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Solution Overview
Problem
Current memory devices face challenges in achieving high-speed data transfer due to limitations in data input/output (I/O) delay settings, which affect their operational efficiency, especially in portable devices where data usage is increasing.
Innovation Solution
A memory device with a data I/O delay setting mechanism that generates specific clock signals for data output and input operations, allowing for synchronized data transfer with external devices, and includes a page buffer and data output buffer to manage data output timing based on set delay control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data I/O delay control signals are implemented to adjust data output timing, then data transfer speed is improved, but device complexity increases
Solution Approach 1:
The patent implements data I/O delay control by changing the timing parameter of clock signals. Specifically, the data output delay control signal adjusts the phase or timing of the first clock signal relative to the second clock signal, allowing precise control over data output timing without adding complex control logic. This parameter-based approach enables flexible data transfer speed optimization while maintaining relatively simple device architecture.
2Reliability
If multiple clock signals are generated for synchronized data transfer, then data transfer reliability is improved, but device complexity increases
Solution Approach 1:
The data output controller generates multiple clock signals (first clock signal and second clock signal) that serve different synchronization purposes simultaneously. The first clock signal synchronizes data output from the page buffer, while the second clock signal synchronizes data output to the external device. This multi-functional clock generation approach ensures reliable synchronized data transfer across different stages without requiring separate control circuits for each synchronization point, thereby improving reliability while controlling complexity.
Data Source
AI summary
A memory device may include a data output controller for generating a first clock signal and a second clock signal in response to a read enable clock signal, a page buffer for storing data, and outputting the data to the data output controller in synchronization with the first clock signal, and a data output buffer for receiving the data from the page buffer and outputting the received data to the external device in synchronization with the second clock signal. The first clock signal is generated in response to a data output delay control signal, the second clock signal is generated irrespective of the data output delay control signal.