A SURFACE ACOUSTIC-WAVE OSCILLATOR-BASED MODULATOR MIXER FOR FREQUENCY-MODULATED ELECTRON NUCLEAR DOUBLE-RESONANCE SPECTROSCOPY

被引：2

作者：

CLARKSON, RB ^{[1
]}

BELFORD, RL ^{[1
]}

REINER, C ^{[1
]}

机构：

[1] UNIV ILLINOIS,ILLINOIS EPR RES CTR,URBANA,IL 61801

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1990年 / 61卷 / 11期

关键词：

D O I：

10.1063/1.1141583

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A device is described that provides frequency modulation to the rf signal used in electron nuclear double resonance (ENDOR) spectroscopy. Its use results in excellent spectral (signal) baseline characteristics while allowing a digital frequency synthesizer to be employed as the source of the swept rf signal. The circuit makes use of a surface acoustic wave (SAW) oscillator as the voltage-controlled frequency source of the frequency modulation, as well as rf mixers and a 5th-order Butterworth filter to produce a spectrally clean modulated frequency output. Provision for the input of a second rf frequency for TRIPLE resonance experiments also is provided. The device can be used in any frequency range with good results, as spectra from X- and Q-band ENDOR systems illustrate.

引用

页码：3356 / 3359

页数：4