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Single-stage photodiode op-amp solution suited for a self-mixing FMCW system
Luleå tekniska universitet.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
2003 (English)In: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, E-ISSN 1557-9662, Vol. 52, no 6, 1820-1824 p.Article in journal (Refereed) Published
Abstract [en]

The current delivered by the photodiode in a self-mixing frequency modulated continuous wave or optical frequency domain reflectometry system consists of a dc-current resulting from the local oscillator, the reflected signal, dark current in the photodiode, and current generated from background light. The current also contains the useful harmonic signal with a beat frequency corresponding to the range and radial velocity of a target. To avoid saturation and clipping due to the dc current generated in the photodiode, it is desirable to minimize the gain at dc while maintaining a high gain in the beat frequency region. We have investigated some different solutions and present a modified current-to-voltage converter using bootstrapping and added voltage gain, which addresses this problem using only one OP-amp and no dc shorting inductors.

Place, publisher, year, edition, pages
2003. Vol. 52, no 6, 1820-1824 p.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
URN: urn:nbn:se:ltu:diva-7540DOI: 10.1109/TIM.2003.820454Local ID: 5ed81870-50b3-11db-9592-000ea68e967bOAI: oai:DiVA.org:ltu-7540DiVA: diva2:980430
Note
Validerad; 2003; 20060929 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Hyyppä, Kalevi

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