Low Field Pulsed Nmr Transmitter Module

The performance of signal amplifier circuit is one of the key factors for the realization of low-field NMR(nuclear magnetic resonance) system. A pulse power amplifier for nuclear magnetic resonance is described in this article. It has a special design based on the characters of low-field NMR.The function blocks of the low field NMR circuit system are analyzed at first. The detail frame chart of reception circuit is given. An optimize design is establish to verify corresponding problems.Secondly, a high pulse power amplifier worked in the high frequency is described in this article. The design of hardware is given in detail. Then dynamic simulations are made for the analysis of the states. At the same time the signal is not only satisfied with different condition in the three states(transmitting, dump,receiving), but also is low-bandwidth.. So some special modules are designed in this article. By imitating of the design characters of the high frequency circuit, the origin and the classification of the noise interferences of the low field NMR circuit system are analyzed.Finally, contrast with the prevenient project and analysis is given.