High-frequency and high-voltage circuit

Abstract

The invention belongs to the technical field of electronic instruments, and particularly relates to a high-frequency and high-voltage circuit, which can be applied to a mass spectrometer. The circuit comprises control circuits 1, 2 and 3, an isolation circuit 4, a switching circuit 5 and a filter circuit 6, wherein each control circuit is composed of a programmable logic device and a driving amplification circuit; the output end of the amplification circuit is connected with a primary circuit input pin of a differential mode coupled circuit, and a signal is isolated by the differential mode coupled circuit and then transmitted to a secondary circuit; the output pin of the differential mode coupled circuit is connected with the control electrode of a control switch, an external adjustable DC power supply is connected with the input end of the switching circuit via the filter circuit formed by a differential mode inductor and a capacitor, and the output end of the switching circuit is connected with a post-stage load; and under control of the control circuits, the switching circuit outputs a square wave signal with high voltage, the filter circuit filters the inputted DC voltage, and a good square wave signal can be acquired. In comparison with other traditional high-frequency and high-voltage circuits, the duty ratio is adjustable conveniently, a diode is parallelly connected between the drain and the source of an MOS transistor, and safety of the circuit is improved.

Description

technical field [0001] The invention belongs to the technical field of electronic instruments, and in particular relates to a high-frequency and high-voltage circuit. Background technique [0002] The continuous improvement of ion sources has bred the generation of large mass ions, and at the same time, the problem is the detection of large mass ions. The traditional ion trap working mode realizes mass analysis by scanning the amplitude. The scanning voltage required for ions with a large mass number is tens of thousands of volts or even tens of thousands of volts. Excessively high voltage will cause the ion trap electrode to discharge. Then damage the device, and even threaten the life safety of the operator. However, the ion trap frequency sweep mode has become more and more advantageous in this respect compared with the traditional sine wave sweep mode. It uses a square wave whose frequency can be precisely controlled to drive the ion trap, and sweeps the frequency of th...

AI Technical Summary

Problems solved by technology

The traditional ion trap working mode realizes mass analysis by scanning the amplitude. The scanning voltage required for ions with a large mass number is tens of thousands of volts or even tens of thousands of volts. Excessively high voltage will cause the ion trap electrode to discharge. Then damage the device, and even threaten the life safety of the operator

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