Hi there everyone I have a simple transistor amplifier question. I have the following amplifier with using NPN darlinton transistors. I am using the output of a photodiode at low frequency square pulses as the input as a test, then scope the output. I notice that the pulses reach VDD but then don't quite reach 0V on the low. It goes down to about .65V. How can I ensure that it reaches 0V?
FYI this amplifier is used for digital applications, not analog.
Also, is it necessary to add a capacitor at Vin to filter out unwanted DC signals? If so what would be an appropriate value?
FYI this amplifier is used for digital applications, not analog.
Also, is it necessary to add a capacitor at Vin to filter out unwanted DC signals? If so what would be an appropriate value?
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