A Nuclear Magnetic Resonance Radiofrequency Pulse Transmitter Based on Digital Modulation Technology
Radiofrequency (RF) pulse transmitter is an important part of a nuclear magnetic resonance (NMR) spectrometer.In this paper, a simple NMR RF pulse transmitter was designed based on field programmable gate array (FPGA) and direct digital synthesis (DDS) chip AD9910.Digital modulation of various parameters was achieved.The control accuracy of frequen