dv/dt-Triggered Suppressor Circuit for Low Transient Current
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Solution Overview
Problem
Existing transient suppression technologies fail to effectively manage high dv/dt currents during electrical overstress events, leading to potential damage to electrical components.
Innovation Solution
A voltage protection circuit with a dv/dt triggered turn-on mechanism, coupled with voltage limiting, current sharing, and level shifting circuits to manage and reduce dv/dt currents, protecting electrical components from transient voltage spikes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing transient suppression technologies are used, then voltage protection is provided, but high dv/dt currents are not effectively managed leading to potential component damage
Solution Approach 1:
The patent implements a dv/dt detection circuit that proactively monitors voltage changes and triggers the suppression mechanism before excessive currents can damage components. The circuit detects rapid voltage changes (dv/dt) and activates the suppression transistor in advance to prevent harmful current flow, rather than reacting after damage occurs.
Solution Approach 2:
The patent introduces a suppression transistor as an intermediary element between the voltage source and protected components. This transistor acts as a controlled switch that diverts dv/dt currents away from sensitive components, serving as a mediator that protects the system by managing harmful current flow through a dedicated control path.
2Reliability
If transient suppression is activated to protect components, then voltage spikes are suppressed, but the suppression mechanism itself may be damaged by high dv/dt currents
Solution Approach 1:
The patent divides the suppression function into separate controlled stages using multiple transistors (suppression transistor and clamp transistor) with distinct activation thresholds. The suppression transistor handles initial dv/dt events, while the clamp transistor provides secondary protection, segmenting the current management tasks to prevent any single component from being overwhelmed by excessive currents.
Solution Approach 2:
The patent implements a clamp circuit that activates after the suppression transistor to provide secondary protection. This clamp circuit acts as a cushioning mechanism that catches and manages any residual or excessive currents that might damage the suppression transistor, providing beforehand protection for the suppression mechanism itself.
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
The solution effectively suppresses transient voltage spikes by controlling dv/dt currents, thereby preventing damage to electrical components and enhancing the reliability of integrated circuits.
Implementation Method 1
a dV/dt triggered turn-on circuit that receives an input voltage and turns on a switch when a change in voltage over time exceeds a predetermined level
Implementation Method 2
A voltage limiting circuit coupled to the dv/dt triggered turn-on circuit limits a maximum voltage seen by the dV/dt triggered turn-on circuit
Implementation Method 3
A current sharing circuit coupled to the dV/dt triggered turn-on circuit controls a level of current through the dV/dt triggered turn-on circuit
Implementation Method 4
A level shifting circuit coupled to the dV/dt triggered turn-on circuit shifts a DC voltage level of the dV/dt triggered turn-on circuit
Data Source
AI summary
A voltage protection circuit, comprising a dV/dt triggered turn-on circuit configured to receive an input voltage and to turn on a switch when a change in voltage over time exceeds a predetermined level. A voltage limiting circuit coupled to the dv/dt triggered turn-on circuit and configured to limit a maximum voltage seen by the dV/dt triggered turn-on circuit. A current sharing circuit coupled to the dV/dt triggered turn-on circuit and configured to control a level of current through the dV/dt triggered turn-on circuit. A level shifting circuit coupled to the dV/dt triggered turn-on circuit and configured to shift a DC voltage level of the dV/dt triggered turn-on circuit.


