High-Resolution Analog Quadrature Sine Oscillator for Lock-in Amplifiers Applications

被引：0

作者：

Garcia-Romeo, D. ^{[1
]}

Martinez, P. A. ^{[1
]}

Calvo, B. ^{[1
]}

Medrano, N. ^{[1
]}

机构：

[1] Univ Zaragoza, Aragon Inst Engn Res I3A, Grp Elect Design GDE, Zaragoza, Spain

来源：

2014 IEEE SENSORS | 2014年

关键词：

Analog quadrature sinusoidal oscillator; tunable frequency; high precision; sensor actuation system;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper introduces a high-precision sine quadrature oscillator based on single resistor-controlled oscillator configuration. It presents advantageous features such as independent control of the oscillation condition regarding to its oscillation frequency, a wide and precise frequency variation and amplitude stability in the whole operating range. To control frequency tuning, it includes an innovative technique which adds R-2R based Digital-to-Analog Converters as control elements. This new approach overcomes the frequency tuning limitation presented by single resistor-controlled oscillators due to tolerance limitations of passive elements. Experimental results validate the proposed configuration, confirming its enormous possibilities in a wide field of applications, such as our driving application, especially, in those related to lock-in amplifiers.

引用

页数：4

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