Storage Latch Gating for Stable Data Capture Under Signal Fluctuation
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Solution Overview
Problem
Existing storage devices using latches or asynchronous flip-flops face issues with signal stability due to undesired fluctuations, leading to potential incorrect data storage, and require more space when using flip-flops for synchronization.
Innovation Solution
A storage device incorporating an AND logic gate and a D latch, where the D latch is activated only when both the selection and status signals are stable, ensuring that the latch is not impacted by signal fluctuations and reducing the space required in the integrated circuit by avoiding the need for flip-flops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flip-flops are used for synchronization to avoid signal fluctuations, then reliability is improved, but device complexity and space occupancy increase
Solution Approach 1:
The patent extracts the essential synchronization function from complex flip-flop circuits and implements it using a simple AND gate that combines a selection signal and its derivative. This removes the need for bulky flip-flop structures while maintaining the core functionality of preventing data storage during signal transitions.
Solution Approach 2:
The patent introduces an intermediary signal (the derivative of the selection signal) that acts as a mediator between the selection signal and the data storage operation. This intermediary enables the system to detect transition states without requiring complex flip-flop circuitry, thus resolving the contradiction between reliability and device complexity.
2Device complexity
If latches are used without synchronization, then device complexity is reduced, but reliability deteriorates due to signal fluctuations
Solution Approach 1:
The patent implements a feedback mechanism where the selection signal is differentiated to create a control signal that feeds back into the AND gate. This feedback allows the system to automatically detect and respond to signal transitions, preventing unreliable data storage while maintaining simple latch-based circuitry.
Solution Approach 2:
The differentiated selection signal serves as an intermediary that mediates between the simple latch structure and the reliability requirement. It provides transition detection capability without requiring complex synchronized circuitry, thus resolving the contradiction between device complexity and reliability.
3Ease of operation
If the activation signal is not stabilized, then ease of operation is improved, but manufacturing precision deteriorates due to incorrect data storage timing
Solution Approach 1:
The patent implements a self-service mechanism where the selection signal automatically generates its own control derivative through differentiation. This self-generated control signal precisely regulates the timing of data storage operations without requiring external intervention, thus maintaining both ease of operation and manufacturing precision.
Data Source
AI summary
A method includes receiving a selection signal from a third-party device and a status signal from the third-party device. A data signal from the third-party device is latched when both the selection signal and the status signal are active. In addition, a second selection signal and a second status signal can be received from a second third-party device and a second data signal latched when both the second selection signal and the second status signal are active.