Design consideration and performance of a digital lock-in amplifier with 68HC11 microcontroller

Ioan Burda; Simion Simon; Mihai Todica; Gheorghe Cristea; Georgeta Cerbanic; Lavinia Cociu

doi:10.1117/12.378640

23 February 2000 Design consideration and performance of a digital lock-in amplifier with 68HC11 microcontroller

Ioan Burda, Simion Simon, Mihai Todica, Gheorghe Cristea, Georgeta Cerbanic, Lavinia Cociu

Proceedings Volume 4068, SIOEL '99: Sixth Symposium on Optoelectronics; (2000) https://doi.org/10.1117/12.378640
Event: SIOEL: Sixth Symposium of Optoelectronics, 1999, Bucharest, Romania

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.

Citation Download Citation

Ioan Burda, Simion Simon, Mihai Todica, Gheorghe Cristea, Georgeta Cerbanic, and Lavinia Cociu "Design consideration and performance of a digital lock-in amplifier with 68HC11 microcontroller", Proc. SPIE 4068, SIOEL '99: Sixth Symposium on Optoelectronics, (23 February 2000); https://doi.org/10.1117/12.378640

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