A DIGITAL PHASE-SHIFTER FOR MULTIPLE PULSE NMR

被引：7
|
作者：
GERSTEIN, BC [1 ]
HAN, JW [1 ]
HWANG, SJ [1 ]
PAN, HJ [1 ]
SKANK, H [1 ]
机构：
[1] IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 1990年 / 61卷 / 09期
关键词：
D O I：
10.1063/1.1141362
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
An eight bit digital phase shifter is described which is suitable for multiple pulse NMR of solids in terms of settling time (≅2 μs) and phase resolution (1.406°). The unit incorporates an 8-bit Merrimac digital phase shifter model PSDW-84-1, and an amplification-damping-pulse shaping circuit to solve the problem of variable attenuation as a function of phase setting. Results of multiple quantum spin counting and homonuclear dipolar decoupling experiments on ensembles of strongly dipolar coupled spin 1/2 systems are used to demonstrate the capability of the unit.
引用
收藏
页码：2349 / 2353
页数：5
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