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Word programmer for NMR

1986; American Institute of Physics; Volume: 57; Issue: 7 Linguagem: Inglês

10.1063/1.1138599

1527-2400

Giovanni Danese, D. Dotti, Huang Guo Jian, Enrico Braschi, Pacifico Confrancesco, Marco Villa,

Advanced MRI Techniques and Applications

A NMR programmer is described which is built around a logic idea and a set of specifications, rather than availability of special or new integrated circuits. We begin by discussing what a quintessential Touring machine can do to solve the problem of outputting words (or pulses) with the resolution of the system clock over arbitrarily long time intervals. We then illustrate a simple realization of this machine, with 4096 program lines, 25-ns resolution, two 16-bit output lines, the possibility of nesting loops down to the 256th level, and a component cost in the 102 $ range. A software ‘‘human’’ interface has been developed in an IBM-PC compatible (MS-DOS) environment, which simplifies the task of debugging the entire NMR spectrometer, and that of designing new experiments. While certainly overspecified for all traditional solid-state NMR experiments, our programmer may meet the requirements of recently suggested selective excitation and imaging experiments in liquids.