Voltage Transient Protection Hold Signal Circuit
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Solution Overview
Problem
Integrated circuits (ICs) and circuits on boards face resets due to minor voltage transients, which are undesirable in noisy environments like vehicle power systems, and existing technologies fail to prevent such resets effectively.
Innovation Solution
Incorporating a supply voltage transient detection module that activates a hold signal to maintain the output state until the voltage returns to a normal range, using a regulator voltage monitor module to generate hold signals and prevent resets during transient drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage transient protection is implemented to prevent resets, then reliability is improved, but device complexity increases
Solution Approach 1:
The voltage monitor module is segmented into multiple independent components: a voltage detection circuit that monitors supply voltage, a hold signal generator that creates preservation signals, and a state holding mechanism that maintains output states. This segmentation allows each component to perform a specific function, improving reliability while keeping individual components simple and manageable.
Solution Approach 2:
A hold signal acts as an intermediary between the voltage monitor and the output stage. When a voltage transient is detected, the hold signal is generated to preserve the current output state, preventing unwanted resets. This intermediary mechanism isolates the output from direct voltage fluctuations, maintaining reliability without requiring complex protection circuits throughout the entire system.
2Stability of the object's composition
If hold signal mechanism is added to maintain output state, then stability is improved, but device complexity increases
Solution Approach 1:
The hold signal mechanism is activated in advance when voltage transients are detected, before they can cause output instability. The voltage monitor continuously watches for transient conditions and preemptively generates hold signals to preserve the current output state, ensuring stability before problems occur rather than reacting after instability has already manifested.
Solution Approach 2:
The hold signal mechanism applies stability protection selectively rather than uniformly across all operating conditions. It activates only when voltage transients are detected, maintaining output stability during critical moments while allowing normal operation during stable voltage conditions. This localized application of protection maintains stability without requiring complex continuous protection mechanisms.
Data Source
AI summary
Methods and apparatus for an integrated circuit that includes a supply voltage transient detection module to activate a hold signal that causes the output to remain in its present state. In one embodiment, the output remains in that state until the supply voltage returns to a normal operating range and the hold signal transitions to an inactive state.