jfet

I found this circuit in notes of an older college. Can somebody please explain me why this additional diode is used? What exactly do feedback resistors 100kOhm and 3Mohm do? What is the purpose of bjt transistor? As you can see I understand very little about this circuit. Notes said that circuit...

Hi everyone, I'm building low power 600w grid following inverter. Scheme is standard with DC-link capacitor at 400v, full bridge H-bridge with 4 power mosfets and LCL filter. LCL filter is designed to filter high switching harmonics. Switching frequency of mosfets is 30kHz and I'm using unipolar...

hello, I have to build an automatic gain control using an FET and an Operational Amplifier, for a phototransistor (SFH314) so that when the signal of an IR LED is weak the AGC maintains the signal, and when the signal is strong reduces it, the gate of the FET I have to control it with the...