I have a switching MOSFET circuit.
Input to the switching MOSFET circuit is 11V at the drain. The gate is connected to a function generator. 5V peak-peak, frequency = 1kHz, 1ms (time period) & 90% duty cycle.
MOSFET Circuit (MOSFET IC Part Number : VN7140AJ) :
Probing at the gate & source (drain is at 11V,) I get the below waveform (only with the MOSFET) :
THE ABOVE WAVEFORM IS OBTAINED WITHOUT CONNECTING THE MOSFET SOURCE TO THE DOWNWARD CIRCUIT. ONLY 11V, FG INPUT is provided and the Output is taken at the source.
With the same MOSFET circuit, if I connect this circuit source terminal to the my new circuit (shown below,)
I get the below waveform:
Why doesn't the MOSFET source go to 0V after I connect to the new circuit? But it goes to 0V, if I don't connect to the new circuit.
It doesn't go to 0V, because of C0101 & C0102 capacitors, or what might be the reason?