I'm trying to visualize an infrared signal using a IR receiver diode but my oscilloscope is showing triangle waves instead of square for the carrier frequency:
One of the guys at EEVblog said I need an op-amp because the signal is too fast (38 kHz) but I'm still learning electronics and haven't used any op-amps before.
Can anybody let me know what I need or point me in the right direction?
(I already have a proper 38 kHz IR receiver with demodulation, etc, but I'm trying to visualize the signal for learning purposes using a "simple" photodiode).
EDIT: Some other questions/answers also seem to indicate I need an op-amp with a sufficient slew rate?