Fuse Detection Circuit Using Calibration Signal to Prevent Misjudgment
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Solution Overview
Problem
Conventional fuse detecting apparatuses are prone to misjudging the state of fuses, leading to incorrect operation of integrated circuits due to incorrect determination of fuse status.
Innovation Solution
A fuse detecting apparatus comprising a detector, a calibrator, and a logical operating unit, where the detector generates an initial detecting result based on fuse state and control signals, and the calibrator provides a calibrating signal to the logical operating unit to generate a calibrated detecting signal, reducing the likelihood of misjudgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fuse detecting apparatus uses a simple latch circuit to detect fuse state, then the device complexity is low, but the reliability of fuse state detection deteriorates due to misjudgement during voltage transition periods
Solution Approach 1:
The fuse detecting apparatus is segmented into three functional modules: a detector module that generates an initial detecting result, a calibrator module that generates a calibrating signal, and a logical operating unit that combines both signals. This segmentation allows the system to separate the detection function from the calibration function, enabling error correction without significantly increasing overall complexity.
Solution Approach 2:
The calibrator module performs preliminary calibration by generating a calibrating signal that reflects the expected state during voltage transition periods. This preliminary action prevents misjudgement before it occurs by providing reference information that the logical operating unit uses to correct the initial detecting result.
2Measurement precision
If the fuse detecting apparatus uses a latch circuit that latches voltage levels during control signal transitions, then the ease of operation is improved, but the measurement precision deteriorates due to open circuit state misrepresentation during transition periods
Solution Approach 1:
The logical operating unit acts as an intermediary between the detector module and the final output. It receives both the initial detecting result from the detector and the calibrating signal from the calibrator, then performs logical operations to combine these signals. This intermediary function allows the system to maintain simple latch circuit operation while correcting measurement precision errors through signal combination.
3Reliability
If a conventional fuse detecting apparatus uses a single detecting circuit, then the device complexity is low, but the reliability deteriorates due to inability to correct misjudgement during voltage transition
Solution Approach 1:
The system changes the parameter of signal combination by performing logical operations on two different signals (initial detecting result and calibrating signal) instead of relying on a single detecting circuit. This parameter change allows the system to improve reliability through signal validation without requiring completely redundant circuit structures.
Data Source
AI summary
A fuse detecting apparatus includes a detector, a calibrator and a logical operating unit. The detector includes a detecting switch module and a detecting latch. The detecting switch module generates an initial detecting result according to first and second control signals and a status of the fuse. The detecting latch stores a voltage level of the initial detecting result or maintains its originally stored voltage level according to the initial detecting result for generating a pre-calibrating detecting signal. The calibrator includes a calibrating switch module and a calibrating latch. The calibrating switch module generates a calibrating result according to the first and second control signals. The calibrating latch stores the calibrating result and generates a calibrating signal accordingly. The logical operating unit generates a calibrated detecting signal according to the pre-calibrating detecting signal and the calibrating signal.