TIA (transimpedance amplifier)
Beginner
A tiny amplifier that boosts the weak electrical signal from a light sensor so other chips can read it.
Novice
A transimpedance amplifier converts the small current a photodiode produces when light hits it into a voltage the rest of the receiver can work with.
Expert
Sets receiver noise and bandwidth. For linear-drive optics it must be linear (no limiting) so the host SerDes can equalize the whole optical path; together with the laser driver it forms the module’s analog front end.