Apply Tee Networks to Broaden TIA Required Solutions (Part 2): Loop Gain Plot, Noise, and Single-Supply Operation (Download)
The tee network algebra of Part 1 can be illustrated by adjusting the terms in-the-loop gain (LG) plot. It gives a visual interpretation of what the tee network is doing.
This article discusses the effect the tee network has on the different output spots and then assesses the integrated noise terms. The required circuit modifications to operate the transimpedance amplifier (TIA) with the tee network using a single supply are shown. Testing the tee in adapting a very demanding 50-MΩ TIA design is then executed, raising the required feedback Cf to equal a typical 0.2-pF parasitic value.