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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Tianyi Liu Anders, J. Ortmanns, M. |
| Copyright Year | 2013 |
| Description | Author affiliation: Inst. of Microelectron., Univ. of Ulm, Ulm, Germany (Tianyi Liu; Anders, J.; Ortmanns, M.) |
| Abstract | This paper presents a design methodology for an optimization of the optical receiver in a neural recording system. In the transcutaneous optical telemetric link (TOTL) system, light/tissue interaction produces significant scattering of the transmitted photons. Therefore, in order to increase the transmission efficiency, it is in principle advantageous to use a photodiode with a larger size to collect more scattered photons. The photodiode size, however, is limited by the bandwidth requirement. In this paper, we derive a mathematical expression of the maximum photodiode size in the presence of constraints imposed by its bias voltage and the receiver bandwidth. A numerical example using real-world TOTL system parameters is given to demonstrate the design methodology. The trade off between transmission efficiency, noise and inter-symbol interference (ISI) in terms of the 3-dB bandwidth of the receiver is investigated. To this end, receivers with bandwidth about 4/3, 3/3, 2/3 and 1/3 of the data rate are compared with respect to the sensitivity. It was found that the receiver bandwidth of 2/3 of the data rate achieves the highest sensitivity for thin tissue (2 mm) and that a receiver bandwidth of 1/3 of the data rate is preferable for thicker tissues (5 and 8 mm). |
| Starting Page | 346 |
| Ending Page | 349 |
| File Size | 826615 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781479914715 |
| DOI | 10.1109/BioCAS.2013.6679710 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-10-31 |
| Publisher Place | Netherlands |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Noise Bandwidth Optical receivers Optical fiber communication Photodiodes Optical transmitters |
| Content Type | Text |
| Resource Type | Article |
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