Input Data Pre-alignment Circuit for DRAM Signal Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DRAM designs, particularly in DDR 4 and DDR 5 applications, face challenges in accurately synchronizing and aligning high-speed data signals with clock signals, which is crucial for efficient data transmission and storage.
Innovation Solution
The input data pre-alignment circuit employs a first-in first-out (FIFO) signal alignment mechanism using a circuit comprising a first amplifier, a second amplifier, a clock control unit, a feedback signal generator, and a signal alignment unit, which automatically aligns data signals with pair-wised clock signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed data transmission capability is implemented in DRAM, then bandwidth utilization is improved, but signal synchronization and signal alignment become more difficult to achieve accurately
Solution Approach 1:
The patent applies preliminary action by performing data signal alignment before the main data transmission process. The alignment circuit pre-adjusts the phase of incoming data signals to match the clock signal phase, ensuring that synchronization is established in advance before data is written to or read from the DRAM array, thereby maintaining accurate alignment at high transmission speeds
Solution Approach 2:
The patent implements feedback through a phase detection mechanism that continuously monitors the alignment between data signals and clock signals. The feedback circuit detects phase differences and dynamically adjusts the alignment circuit to correct any drift, ensuring sustained signal alignment accuracy even during high-speed operation where timing errors could accumulate
2Measurement precision
If signal alignment mechanism is added to DRAM design, then signal synchronization accuracy is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary alignment circuit that acts as a mediator between the incoming data signals and the internal DRAM clock signals. This separate alignment unit processes signals through distinct stages (alignment circuit followed by latch circuit), isolating the synchronization complexity from the main data path while achieving accurate alignment without significantly increasing overall system complexity
Data Source
AI summary
An input data pre-alignment circuit includes a first amplifier, a second amplifier, a clock control unit, a feedback signal generator, and a signal alignment unit. The first amplifier includes a first input terminal for receiving a data signal, a second input terminal for receiving a reference signal, a first output terminal, and a second output terminal. The second amplifier is coupled to the first output terminal of the first amplifier and the second output terminal of the first amplifier. The clock control unit is used for receiving pair-wised clock signals. The feedback signal generator is coupled to the second amplifier and the clock control unit. The signal alignment unit is coupled to the second input terminal of the first amplifier, the first output terminal of the first amplifier, the second output terminal of the first amplifier, and the feedback signal generator.