Hello,
Hope everybody is in good health,
I am a bit new to this High speed amplifiers world, i have basic understanding of the devices. I am working on a university project, that requires me to build a modulating LED driver circuit - from what I have researched is that, it can be built with a high speed OP-AMP (transconductance amplifier, voltage to current converter)
It is to be used as a fiber optic transmitter, so the output of an LED which is a pigtail fiber will be connected to the fiber cable.
I am using a IR Led for the fiber optic transmission.
This IR LED has an operating/forward current of 40mA - 60mA and forward voltage of 1.2V - 1.7V
1. LED should be biased for sinusoidal modulation
2. Pulse width of the analog signal to be LED modulated will be 0.1 microsecond, 1 Mhz frequency
3. Will be modulated with sine wave of 25Mhz to 50Mhz.
I am following this design by Neil P. Albaugh -, the input to the circuit will be through a function generator but the OP-AMP he has used has a slow slew rate and from what I have studied is that, a slow slew rate op-amp for this project may not work.
also I have read on different datasheets in TI website, that there are transconductance amplifiers ... while Neil has used a non-transconductance amplifier, so this has made me a bit confused.
Can any engineers out there help me .... thanks a lot.
