Pre-posed amplification system for nuclear magnetic resonance spectrometer or imaging instrument

Abstract

Disclosed in the invention is a pre-posed amplification system for a nuclear magnetic resonance spectrometer or an imaging instrument. The pre-posed amplification system is composed of a central controller, a system bus, and a plurality of pre amplifiers. All pre amplifiers include controllers. The central controller connected with the controllers of the pre amplifier by the system bus is used for transmitting control signals to all pre amplifiers. All pre amplifiers are connected in parallel to the system bus and the interfaces, for receiving the control signals from the central controller, of all pre amplifiers are identical. The controllers are used for adjusting working states of the pre amplifiers according to the control signals of the central controller and upload the working states of the pre amplifiers to the central controller. According to the invention, problems of complicated control signal and difficult pre amplifier adding and reduction can be effectively solved. Moreover, the pre amplifiers can provide enough gains and the noise coefficients are low; and the pre amplification effect is good.

Description

technical field [0001] The invention belongs to the field of nuclear magnetic resonance instruments, and more specifically relates to a preamplification system for a nuclear magnetic resonance spectrometer or imager. Background technique [0002] The nuclear magnetic resonance instrument is developed and produced by applying the principle of nuclear magnetic resonance. It excites the resonance phenomenon of the atomic nucleus of the measured object by sending a high-power pulse signal to the measured object, and measures the weak signal generated by the macroscopic magnetization vector of the atomic nucleus in the receiving coil of the nuclear magnetic resonance instrument. The measured object information is thus obtained. Since the information in the receiving coil is weak, a preamplifier must be used. In the nuclear magnetic resonance spectrometer or imager, the high-power pulse signal and the weak nuclear magnetic resonance signal need to pass through the preamplifier in...

AI Technical Summary

Problems solved by technology

[0008] For the above defects or improvement needs of the prior art, the object of the present invention is to provide a preamplifier system for nuclear magnetic resonance spectrometer or imager, wherein through its key preamplifier layout, control mode, signal flow direction Compared with the existing technology, it can effectively solve the problems of complex control signals and difficulty in increasing or decreasing the preamplifier, and the preamplifier can provide sufficient gain and low noise figure, and the effect of the preamplifier is good.

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