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Proceedings Paper

Design consideration and performance of a digital lock-in amplifier with 68HC11 microcontroller
Author(s): Ioan Burda; Simion Simon; Mihai Todica; Gheorghe Cristea; Georgeta Cerbanic; Lavinia Cociu
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Paper Abstract

The lock-in amplifier technique is frequently use din characterization of optoelectronic devices. A digital lock- in amplifier and a digital direct synthesis signal generator are implemented with a general propose 68HC11E1FN microcontroller. The resolution in frequency is less than 1 Hz. The digital lock-in amplifier over a frequency range from 1 Hz to 1 kHz and can measure signal at any harmonic of the reference signal. Typical error is less than 0.5 percent for the range of frequencies reported. This digital lock-in technique is inexpensive and can be used in experiments with low frequency response.

Paper Details

Date Published: 23 February 2000
PDF: 6 pages
Proc. SPIE 4068, SIOEL '99: Sixth Symposium on Optoelectronics, (23 February 2000); doi: 10.1117/12.378640
Show Author Affiliations
Ioan Burda, Babes-Bolyai Univ. (Romania)
Simion Simon, Babes-Bolyai Univ. (Romania)
Mihai Todica, Babes-Bolyai Univ. (Romania)
Gheorghe Cristea, Babes-Bolyai Univ. (Romania)
Georgeta Cerbanic, Babes-Bolyai Univ. (Romania)
Lavinia Cociu, Babes-Bolyai Univ. (Romania)

Published in SPIE Proceedings Vol. 4068:
SIOEL '99: Sixth Symposium on Optoelectronics
Teodor Necsoiu; Maria Robu; Dan C. Dumitras, Editor(s)

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