Amplifier capable of continuously adjusting high-frequency micro-signal times for mass spectrometer

Abstract

The invention discloses an amplifier capable of continuously adjusting high-frequency micro-signal times for a mass spectrometer. The amplifier comprises a first-stage amplifier, a second-stage amplifier, a first third-stage amplifier, a first fourth-stage amplifier, a first load, a second third-stage amplifier, a second fourth-stage amplifier and a second load, wherein an output end of the first-stage amplifier is connected to an input end of the second-stage amplifier; an output end of the second-stage amplifier is connected to an input end of the first third-stage amplifier and an input endof the second third-stage amplifier respectively; an output end of the first third-stage amplifier is connected to an input end of the first load through the first fourth-stage amplifier; and an output end of the second third-stage amplifier is connected to an input end of the second load through the second fourth-stage amplifier. Through adoption of the amplifier, the mass spectrometer, particularly a time-of-flight mass spectrometer can read electronic time resolution. Moreover, each stage of amplifier can be adjusted in amplification times to amplify different micro-signals by different amplification times, so that the instrument sensitivity is increased greatly.

Description

technical field [0001] The invention relates to an amplifier with continuously adjustable multiples, in particular to an amplifier with continuously adjustable multiples for high-frequency micro-signals used in mass spectrometers. Background technique [0002] Mass spectrometry is an analytical method for analyzing the composition and structure of substances through the determination of the mass-to-charge ratio of the measured sample ions, and a mass spectrometer is an instrument capable of mass spectrometry analysis. A mass spectrometer is mainly composed of an ion source, a mass analyzer, a detector, and a data acquisition system. The ion source first ionizes the sample to be analyzed, and then the mass analyzer uses the difference in the movement of different ions in the electric field or magnetic field to separate the ions according to the mass-to-charge ratio, and the detector collects the separated ion signals into analog signals. The system digitizes the ion signals ...

AI Technical Summary

Problems solved by technology

[0004] However, the existing amplifiers have the following disadvantages: 1. The bandwidth is narrow, and there is no good high-frequency characteristic, so it is impossible to amplify micro-signals without distortion; 2. The magnification factor is fixed, and the amplification cannot be adjusted for different signals, so it cannot be effective Improve the signal-to-noise ratio and dynamic range of mass spectrometer signals; 3. High power consumption, not suitable for preamplification of portable mass spectrometers; 4. Weak anti-interference ability, unable to meet the application of mass spectrometers in complex electromagnetic environments

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