Self-Protection Circuitry for Bidirectional Spike Isolation
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Solution Overview
Problem
Existing circuit protection methods, such as using parasitic capacitors or diodes, are ineffective in protecting circuits from spikes while operating normally, as these components remain electrically connected and can affect circuit performance, providing only one-way spike protection.
Innovation Solution
A self-protection circuitry is designed with a first transistor circuit, a first switch circuit, and a control circuit. The control circuit controls the first switch circuit to be turned on before power is supplied to the transistor circuit and turned off after continuous power supply, effectively managing spike protection and minimizing the impact of the switch circuit on the overall circuit operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a parasitic capacitor or diode is used to guide spikes to ground, then spike protection is achieved, but the component affects normal circuit operation and provides only one-way protection
Solution Approach 1:
The patent employs dynamic control of the protection circuit through a control signal that activates the switch circuit only during spike events. The transistor circuit transitions between conducting and non-conducting states based on voltage thresholds, enabling the protection mechanism to be active only when needed rather than continuously interfering with normal operation.
Solution Approach 2:
The invention extracts the protection function into a separate, independently controllable circuit block. The switch circuit and transistor protection circuit are distinct from the main operational circuit, allowing the protection mechanism to be isolated and controlled separately, thus preventing interference with normal circuit operation while maintaining protection capability.
2Reliability
If a protection circuit is continuously connected to the circuit, then protection is always available, but the protection circuit affects normal circuit operation
Solution Approach 1:
The protection circuit operates periodically rather than continuously, activating only when spike conditions are detected. The control circuit monitors voltage levels and triggers the switch circuit only during transient spike events, allowing the main circuit to operate without interference during normal conditions while maintaining protection availability when needed.
Solution Approach 2:
The control circuit incorporates feedback mechanisms that monitor circuit voltage levels and automatically activate or deactivate the protection circuit based on detected conditions. This feedback control ensures the protection circuit is engaged only when spike protection is actually required, eliminating continuous interference with normal operation.
Data Source
AI summary
A self-protection circuitry is configured to receive a first power source. The self-protection circuitry includes a first transistor circuit, a first switch circuit, and a control circuit. The first transistor circuit includes a first input terminal, a first output terminal, and a first control terminal. The first input terminal is configured to receive the first power source. The first output terminal is electrically connected to a ground terminal. The first switch circuit is electrically connected to the first input terminal and the ground terminal. The control circuit is electrically connected to the first switch circuit, and is configured to: before the first power source supplies power to the first transistor circuit, control the first switch circuit to be turned on, and after the first power source continuously supplies power to the first transistor circuit, control the first switch circuit to be turned off.