An optical led transmitter for baseband video with JFET non-linearity compensation |
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| Affiliation: | 1. Tsinghua-Berkeley Shenzhen Institute, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;2. Peng Cheng Laboratory, Shenzhen 518055, China;3. Department of Information and Communication Engineering, School of Informatics, Xiamen University, Xiamen 361005, China;4. National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China;5. Department of Electronic Engineering, Tsinghua University, Shenzhen 100084, China;6. RISC-V International Open Source Laboratory, Shenzhen 518055, China;7. Department of Electrical and Computer Engineering, Ryerson University, Toronto M5B2K3, Canada;1. Hitit University, Vocational School of Technical Sciences, Electrical and Energy, 19169 Çorum, Turkey;3. Hitit University, Vocational School of Technical Sciences, Department of Machine, 19169 Çorum, Turkey |
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| Abstract: | An optical, intensity-modulated LED transmitter for analog transmission of baseband video signals is presented. A differential-gain reduction of more than 20 dB can be obtained by means of a novel compensation technique using a JFET as the compensation device.The circuit as described in this paper is capable of supplying a signal current of about 100 mA into an LED, resulting in an optical output power of −18 dBm coupled into a 50 μm graded-index fibre. A bandwidth of more than 20 MHz is available for high-resolution picture transmission. Differential gain amounts to about two per cent. Differential phase is less than one degree. |
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