Switch circuit capable of quickly discharging transistor parasitic capacitance charge and charge discharging method thereof

Abstract

The invention claims a switch circuit capable of quickly discharging transistor parasitic capacitance charge. The switch circuit comprises a transistor connected with the load; the input end of the transistor is connected with a charge discharging circuit; the charge discharging circuit receives a second controlling signal provided by the external device for discharging the charge on the transistor parasitic capacitance under the action of the second controlling signal, and lowering the potential on the input end of the transistor to the reference potential. At the same time, the invention also discloses the charge discharging method of the switch circuit. The switch circuit provided by the invention can effectively eliminate the delay phenomenon when starting up the load through quickly regulating the potential on the input end of the transistor down by utilizing the charge discharging circuit in the transitional stage of turning from on to off, thus greatly reducing the time cost wasted on reducing the virtual high potential of the input end after the transistor is on.

Description

technical field [0001] The invention belongs to the technical field of switch control circuits, and in particular relates to a switch circuit with a fast discharge transistor parasitic capacitance charge and a charge discharge method thereof. Background technique [0002] In the application of using MOS tubes as adjustment and control switches, one end of an electronic component (including but not limited to resistors, transistors, LEDs, etc.) is often connected to a switch circuit (such as a MOS tube), and the switch circuit is used as an electronic component A circuit structure in which a device switches to control or conduct electric current. Although in theory turning on the MOS tube can make the electronic components connected to the MOS tube conduct normally, but in practice, the MOS tube itself is already in the conducting state, but there is no current or current in the electronic components connected to it. Too small, it takes a certain amount of time for the curre...

AI Technical Summary

Problems solved by technology

V G The pulse width is only 20ns to display a certain level of grayscale, and the brightness is doubled by using twice the pulse width of 20ns to display the grayscale, but the existence of the delay time not only destroys the ratio of 2 times, but also causes the actual lighting of the 20ns pulse width The time is not 20ns

And do not see the public report about the solution of this problem at present, therefore urgently need a kind of technology to solve this difficult problem

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