Driving Circuit With Negative Voltage Level To Suppress Ringing Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional driving circuits face issues with ringing noise interference and slow turn-off speeds of switch elements, leading to unintended switching and inefficiencies.
Innovation Solution
A driving circuit and method that generate a driving voltage signal with three levels, including a level lower than zero, to control switch elements, preventing mistaken activation and enhancing turn-off speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a zero-level signal is used to turn off the switch element, then the circuit is simple, but the switch element may be inadvertently turned on due to ringing noise interference
Solution Approach 1:
The patent changes the voltage level parameter from zero-level to negative-level for the turn-off signal. By applying a negative voltage (lower than the threshold voltage) to the gate terminal, the switch element is reliably turned off and immune to ringing noise interference that would otherwise cause inadvertent turn-on.
2Productivity
If the turn-off speed of the switch element is increased, then the switching efficiency is improved, but the control complexity increases
Solution Approach 1:
The patent uses a negative voltage level that is lower than the threshold voltage to accelerate the turn-off process. This parameter change in the control signal creates a stronger electric field that quickly removes charge from the channel, achieving fast turn-off without requiring complex control circuits or additional components.
Data Source
AI summary
A driving circuit configured to control at least one switch element is disclosed in the present disclosure. The driving circuit includes a first voltage generating circuit, a second voltage generating circuit and a driving voltage generating circuit. The first voltage generating circuit is configured to generate a first voltage signal. The second voltage generating circuit is configured to generate a second voltage signal. The driving voltage generating circuit is electrically coupled with the first voltage generating circuit and the second voltage generating circuit. The driving voltage generating circuit outputs at least one driving voltage signal according to the first voltage signal and the second voltage signal. The at least one driving voltage signal comprises three levels. At least one level of the levels is lower than zero level.