Design and evaluation of a transimpedance-amplifier for a LiFi receiver

• Typ der Arbeit: Forschungsprojekt
• Status der Arbeit: abgeschlossen
• Projekte: SatelLight
• Betreuer: Marek Jahnke

In LiFi communication the receiver needs to detect and amplify the light signal from the sender. One possible receiver front end consists of a photodiode and a transimpedance-amplifier, which amplifies the current produced by the photodiode. Dealing with small components, variable distances, high datarates and a very high amplifier-gain the challenge is to reduce the overdrive of the operational amplifier (OPA), which significantly reduces the speed.

In this project work different possible components and circuits for a transimpedance-amplifier should be researched, analyzed and compared.

Questions to keep in mind: - Speed / Distance / Relation - Complexity / Size - How to tackle the problem of OPA overdrive (with dynamic distances)?

Tasks

• Get familiar with the topic, literature research
• Research different amplifier circuits
• Research components, characterize, pro/contra
• Design, analyze and simulate circuit(s) (based on the previous research)

• Develop, build, test and evaluate Hardware/PCB/Circuit

• Documentation

Further Reading

• The Transimpedance Amplifier [A Circuit for All Seasons]

  Behzad RazaviIEEE Solid-State Circuits Magazine11.1Institute of Electrical and Electronics Engineers (IEEE)2019.
  10.1109/mssc.2018.2881860 [BibTex]

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  BibTex Entry

  @article{Razavi2019,
  author = {Behzad Razavi},
  doi = {10.1109/mssc.2018.2881860},
  journaltitle = {{IEEE} Solid-State Circuits Magazine},
  number = {1},
  pages = {10–97},
  publisher = {Institute of Electrical and Electronics Engineers ({IEEE})},
  title = {The Transimpedance Amplifier [A Circuit for All Seasons]},
  volume = {11},
  year = {2019},
  }

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