Shared Fuse Latch Circuit for Area-Efficient State Sensing
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Solution Overview
Problem
Existing fuse circuits require multiple exclusive latch circuits, which increases circuit area, necessitating a solution to reduce this area while maintaining effective latching and sensing of fuse information.
Innovation Solution
A global latch circuit is introduced to sense and output the blown states of multiple fuse circuits, with local latch circuits latching the information, allowing multiple fuse circuits to share the same global latch circuit in a time-division manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple exclusive latch circuits are equipped for each fuse circuit, then each fuse circuit can be independently sensed and latched, but the circuit area increases significantly
Solution Approach 1:
Multiple fuse circuits share a common global latch circuit instead of each having its own exclusive latch circuit. The global latch circuit is controlled by a selection signal to selectively sense and latch the blown state of different fuse circuits, thereby reducing the total number of latch circuits while maintaining independent sensing capability.
Solution Approach 2:
The global latch circuit is designed to perform multiple functions: it can sense and latch the blown state of any fuse circuit in the array by receiving different selection signals. This multi-functional design allows a single latch circuit to replace multiple exclusive latch circuits, significantly reducing circuit area.
2Area of stationary object
If a shared global latch circuit is used for multiple fuse circuits, then circuit area is reduced, but the complexity of coordinating sensing operations increases
Solution Approach 1:
A selection signal mechanism is introduced as an intermediary to coordinate between the global latch circuit and multiple fuse circuits. The selection signal selectively enables the global latch circuit to sense specific fuse circuits at different times, simplifying the coordination complexity by providing a clear control interface.
Solution Approach 2:
The global latch circuit operates in a time-division manner, periodically selecting different fuse circuits for sensing based on control signals. This periodic selection approach organizes the sensing operations in a structured sequence, making the coordination manageable and systematic.
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
This configuration enables efficient sensing and latching of fuse information across multiple fuse circuits, reducing the overall circuit area by allowing multiple fuse circuits to share a single global latch circuit, thereby optimizing space usage.
Implementation Method 1
the blown anti-fuse has a low resistance value, while the un-blown anti-fuse has a high resistance value. Based on the material of the anti-fuse, in some embodiments, the resistance value of the blown anti-fuse may be in the range of 2 to 100 KΩ, while the resistance value of the un-blown anti-fuse may be in the range of 5000 to 20,000 KΩ. The fuse latch circuit can sense the resistance state (blown state) of the anti-fuse
Data Source
AI summary
The fuse device includes a plurality of fuse circuits, a global latch circuit and a plurality of local latch circuits. The global latch circuit is coupled to the fuse circuits. The global latch circuit is used to sense the blown states of the fuse circuits at different times, so as to output the fuse information of the fuse circuits at the different times. The local latch circuits are coupled to the global latch circuits. Each of these local latch circuits latches the fuse information output by the global latch circuit at the different times.