You'll have to cascade several low gain stages, even with wideband op amps, to get that much gain.The gain I have not thought about yet, maybe 10^4? The pulses come from a photodetector, in the 10-13MHz frequency range. Low voltage single source is the constraint for the supply.
I predict you will need a preamp. The 10D capacitance @-10V is a whopping 350pF.Just bought the lt1016, thanks for the help.
Audioguru was, I believe, pointing out that, given the direction of current you indicated, the output voltage would have nowhere to go, since it is already at ground when the diode current is zero. I think you drew the current pointing the wrong way, but your diode is connected correctly. My understanding is that the photocurrent will flow from cathode to anode.See fig. 2-4(b), here.Thanks for the help. I understand that the LM324 cannot handle the 10MHz frequency, I want to breadboard a test circuit with the 324 at low frequencies while I wait so I can understand how the circuit works. I thought the 324 is a single supply opamp which only requires a single positive supply? Isn't this how single supply opamps work?
by Jake Hertz
by Aaron Carman