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

页码：2349 / 2353

页数：5

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