ESD Protection Circuit False-Trigger Prevention Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrostatic discharge protection circuits often falsely trigger during power transitions, leading to unnecessary discharging and potential damage to electronic components.
Innovation Solution
An electrostatic discharge protection circuit incorporating a RC circuit, an inverter, a switch transistor, and a discharging transistor, where the switch transistor is turned on at a predetermined voltage level to prevent false triggering by turning off the P-type transistor circuit, thereby controlling the voltage level and preventing false discharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the electrostatic discharge protection circuit uses a simple discharging mechanism, then the circuit can quickly discharge electrostatic energy, but the circuit may falsely trigger during power transitions causing unnecessary discharging
Solution Approach 1:
The patent introduces an RC circuit as an intermediary element between the power input and the discharging transistor control. The RC circuit acts as a mediator that filters out transient voltage spikes during power transitions, allowing the discharging mechanism to respond only to genuine electrostatic discharge events rather than normal power fluctuations. This resolves the contradiction by enabling fast discharging when needed while preventing false triggers during routine power transitions.
Solution Approach 2:
The patent implements a voltage threshold detection mechanism that performs preliminary action by monitoring the power voltage before triggering the discharging transistor. The circuit预先 (in advance) establishes a threshold voltage level that must be exceeded to activate discharging, thereby preventing premature or false triggering during normal power transitions while maintaining readiness for actual electrostatic discharge events.
2Reliability
If the circuit maintains continuous monitoring to prevent false triggering, then the reliability improves, but the power consumption increases
Solution Approach 1:
The patent employs periodic action through the RC circuit's natural charging and discharging cycles. Instead of continuous active monitoring, the RC circuit periodically samples the voltage state through its time-constant-based charging curve. This allows the circuit to maintain reliable detection capability while consuming minimal power, as the monitoring is inherently periodic rather than continuous, reducing energy usage while preserving false-trigger prevention.
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
Effectively prevents false triggering of the discharging mechanism, ensuring that the electrostatic discharge protection circuit only discharges when necessary, thereby protecting electronic components from unnecessary power fluctuations.
Implementation Method 1
a RC circuit electrically coupled between an electrostatic discharge input terminal and a ground terminal and comprising an input control terminal
Implementation Method 2
a discharging transistor electrically coupled between the electrostatic discharge input terminal and the ground terminal, wherein a gate of the discharging transistor is controlled by the output control terminal
Data Source
AI summary
The present invention discloses an electrostatic discharge protection circuit having false-trigger prevention mechanism. A RC circuit, including an input control terminal, is coupled between an electrostatic discharge input terminal for receiving an input power and a ground terminal. An inverter includes a P-type transistor circuit, including P-type transistors coupled between the electrostatic discharge input terminal and an output control terminal in series and having an internal connection terminal between two of the P-type transistors, and an N-type transistor, coupled between the output control terminal and the ground terminal. Gates of the P-type and N-type transistors are controlled by the input control terminal A switch transistor, having the gate controlled by the input control terminal, is coupled between the internal connection terminal and the ground terminal. A discharging transistor having the gate controlled by the output control terminal, is coupled between the electrostatic discharge input terminal and the ground terminal.