Semiconductor Memory Data Path Controller DDR Timing

The patent implements DDR operation by using periodic clock edges (rising and falling edges) to control data transmission. The data path controller enables data to be transmitted on both edges of the clock signal, effectively doubling the data bandwidth without requiring continuous activation of all data paths. This periodic action allows the same physical infrastructure to be reused alternately for different data transmissions, reducing current consumption compared to continuously active parallel paths.

The patent employs dynamic control of data path activation through the data path controller. Instead of having all transmission gates continuously active, the controller dynamically enables only the necessary data paths at specific clock edges. This dynamic activation reduces the overall current consumption while maintaining the required data bandwidth by activating paths only when needed rather than continuously.

The patent merges the control functions of multiple transmission gates into a single data path controller. Instead of having separate control logic for each transmission gate, the data path controller consolidates these functions and manages multiple data paths through a unified control mechanism. This merging reduces the overall device complexity and chip size while still enabling parallel data transmission capabilities for DDR operation.

The data path controller serves multiple functions: it manages both rising and falling edge data transmissions, controls multiple data paths, and coordinates with the sense amplifiers. This multi-functional approach eliminates the need for separate dedicated control circuits for each function, thereby reducing device complexity and chip size while maintaining the required data bandwidth for DDR operation.

The data path controller implements feedback mechanisms to monitor and adjust the timing of data transmissions on both rising and falling clock edges. By using feedback from the clock signal and data path status, the controller maintains precise synchronization without requiring overly complex external control logic. This feedback-based approach simplifies the overall synchronization system while enabling high-speed DDR operation.

The data path controller acts as an intermediary between the sense amplifiers and the output buffers, managing the timing and coordination of data transmissions on both clock edges. This intermediary role centralizes the synchronization complexity within a single control unit rather than distributing it across multiple components, thereby reducing overall system complexity while maintaining high data access speed through coordinated dual-edge transmission.