Hello, thanks for the reply
Sorry i meant 550nm.
So since it is the radiated energy that i observe through the photodiode the frequency spectrum is located around 0Hz with an upper frequency response around the 440MHz. Ok thanks!
Do you know any Bipolar transistors suited for this broadband amplification, with focus on a low noise figure?
I have only worked with narrowband hf amplifications, how do you couter the fact that the transistor changes it Y'parameters over the broad frequency band? Do you calculate an average, or design the amplifier for the Y'parameters at the center of the required frequency band?