23 February 2000 Design consideration and performance of a digital lock-in amplifier with 68HC11 microcontroller
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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
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.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ioan Burda, Ioan Burda, Simion Simon, Simion Simon, Mihai Todica, Mihai Todica, Gheorghe Cristea, Gheorghe Cristea, Georgeta Cerbanic, Georgeta Cerbanic, Lavinia Cociu, 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); doi: 10.1117/12.378640; https://doi.org/10.1117/12.378640

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