Electronic switch circuit design method for realizing nanosecond speed under large capacitive load

Abstract

The invention discloses an electronic switch circuit design method for realizing nanosecond speed under large capacitive load. A circuit between the output end of an electronic switch and a capacitiveload is connected in series with a switch element; when the electronic switch starts up, the output end of the electronic switch is connected with the capacitive load through the switch element; andwhen the electronic shuts off, the output end of the electronic switch is disconnected with the capacitive load through the switch element so as to cut off the charge bleeding circuit of the capacitive load. In the electronic switch circuit design method, the terminal voltage of a load capacitor is the same as power supply voltage through a method of cutting off the discharge circuit of the capacitive load when the electronic switch shuts off and opening the charge circuit when the electronic switch opens, the opening and closing conditions of the electronic switch are improved, thereby greatly improving the switching speed of the electronic switch and truly realizing nanosecond speed.

Description

technical field [0001] The invention relates to a circuit design method for an electronic switch to realize nanosecond-level speed under a large capacitive load. Background technique [0002] For an electronic system, in order to work stably, the power supply needs decoupling capacitors, so the power supply system must have a large capacitive load. With the rapid development of electronic technology, the speed of electronic switching has reached the level of nanoseconds. However, under the capacitive load of the electronic switch, since the capacitor must have a charging and discharging process when the switch is turned on and off, it is the charging and discharging time of the capacitor that greatly reduces the switching speed. [0003] In order to solve the influence of capacitor discharge on the turn-off speed of the switch, a discharge switch is generally designed for capacitor discharge, such as figure 1 shown. This method is feasible for the case where the load capa...

AI Technical Summary

Problems solved by technology

Obviously, under the current technical conditions, it is almost impossible to prepare such a switch. If the load capacitance value is 10μF or greater, this method cannot achieve nanosecond speed at all.

In addition, this method can only increase the turn-off speed of the switch, but cannot increase the turn-on speed.

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