Kassem, A;
Darwazeh, I;
(2019)
A high bandwidth modified regulated cascode TIA for high capacitance photodiodes in VLC.
In:
2019 IEEE International Symposium on Circuits and Systems (ISCAS).
IEEE: Sapporo, Japan.
(In press).
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Abstract
This work reports a modified regulated cascode (RGC) amplifier which, when used as a transimpedance amplifier (TIA), improves tolerance to ultra-high photodiode capacitances encountered in some optical communications applications. When a conventional RGC is used as a TIA the Miller capacitance, introduced by the base-collector capacitance of its common base stage, limits bandwidth and compromises stability. Such undesirable characteristics are simply eliminated by introducing an additional cascode stage that nullifies the Miller capacitance. We show that exceptional improvement in bandwidth can be made, which is important for visible light communication systems, where using large-area (large capacitance) photodiodes is desirable.
| Type: | Proceedings paper |
|---|---|
| Title: | A high bandwidth modified regulated cascode TIA for high capacitance photodiodes in VLC |
| Event: | ISCAS 2019 |
| ISBN-13: | 9781728103976 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ISCAS.2019.8702692 |
| Publisher version: | https://doi.org/10.1109/ISCAS.2019.8702692 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Capacitance , Bandwidth , Photodiodes , Stability analysis , Impedance , Circuit stability , Optical fiber amplifiers |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10080757 |
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