%0 Journal Article
%T A Digital Transmitter for NMR Based on FPGA<br>基于FPGA的核磁共振数字化发射机
%A CHEN Nan
%A CHEN Jie-hua
%A HU Peng
%A LIU Chao-yang
%A GAO Jun-yi
%A <br>陈楠
%A 陈杰华
%A 胡鹏
%A 刘朝阳
%A 高军毅
%J 波谱学杂志
%D 2008
%I 
%X This paper presents an FPGA-based design scheme of NMR digital orthogonal transmitter. Utilizing embedded blocks such as RAM and the resources of logic gate of the FPGA and based on ARM7 and other communication systems, the realized transmitter is shown to be able to provide accurate high speed pulsed output with FM, PM or AM. Synchronously controlling two pieces of DDS using the FPGA, the transmitter is able to provide orthogonal RF output. In addition, both of the signals in orthogonal output can be regulated independently. This flexible design can be conveniently extended to the design of multi-channel transmitter.
%K FPGA<br>核磁共振
%K 发射机
%K 直接数字合成
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=1A3C8C6E452BD1AF5A6B6B99BA3989C9&aid=69D6733845C3186F774F74D31EC5D21A&yid=67289AFF6305E306&vid=C5154311167311FE&iid=0B39A22176CE99FB&sid=B78CD622C1934236&eid=D537C66B6404FE57&journal_id=1000-4556&journal_name=波谱学杂志&referenced_num=1&reference_num=7