Antifuse Data Storage Circuit with Initialization Flag
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Solution Overview
Problem
Current data storage circuits in integrated circuits lack efficient mechanisms for programming and initialization, particularly in managing antifuse-based data storage and initialization flags, which affects data retention and accessibility.
Innovation Solution
A data storage circuit incorporating a first antifuse for programming and a second antifuse for initialization, controlled by access signals and an initialization flag, allowing for data output indicating the programmed or initialized state, with a controller generating necessary signals to manage these operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single antifuse structure is used for data storage, then the device complexity is reduced, but the ability to distinguish between programmed and initialized states is compromised
Solution Approach 1:
The patent divides the data storage functionality into two separate antifuse structures: a first antifuse for data storage and a second antifuse for initialization state tracking. This segmentation allows the circuit to maintain both programmed and initialized state information independently, resolving the contradiction between simplicity and state distinction capability.
2Ease of operation
If antifuse programming is performed without initialization control, then the programming operation is simplified, but data integrity and state management are compromised
Solution Approach 1:
The patent implements an initialization section that prepares the data node by clearing previous states before programming operations. The second antifuse is programmed first to set the initialization flag, which then controls the initialization section to properly prepare the data node for subsequent programming. This preliminary action ensures data integrity while maintaining operational clarity.
Solution Approach 2:
The patent uses the initialization flag from the second antifuse as feedback to control the initialization section. This feedback mechanism ensures that the data node is properly initialized before programming operations, maintaining data integrity without complicating the programming process itself.
3Device complexity
If voltage levels are not controlled during antifuse operations, then the circuit operation is simplified, but the reliability of data storage and state indication is compromised
Solution Approach 1:
The patent applies different voltage levels to different parts of the circuit based on their specific functions: a first voltage level for programming the first antifuse, a second voltage level for programming the second antifuse, and a third voltage level for reading data. This localized voltage control ensures reliable operation of each component without requiring complex global voltage management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable data storage and initialization by clearly distinguishing programmed and initialized states, ensuring data integrity and accessibility through controlled voltage levels and signal management.
Implementation Method 1
a first antifuse configured to be programmed in response to a first access signal, and provide data indicating whether the first antifuse is programmed to a data node
Implementation Method 2
a second antifuse configured to be programmed in response to the first access signal, and provide the initialization flag indicating whether the second antifuse is programmed to the initialization section
Data Source
AI summary
A data storage circuit includes a first antifuse which is programmed in response to a first access signal, and provide data indicating whether the first antifuse is programmed to a data node, an initialization section which controls a voltage level of the data node in response to an initialization flag, and a second antifuse which is programmed in response to the first access signal, and provide the initialization flag indicating whether the second antifuse is programmed to the initialization section.