Hello everyone!
I'm currently designing a simple circuit which is working as I want but I'd like to make sure that I haven't done any dumb mistake. That's why I'm asking here.
I'd like a signal to switch ON a MOSFET in order to activate a relay. This signal is usually low (0 VDC) but sometimes it becomes a pulse train of +3VDC at around 3Hz. That's when I want my MOSFET to be ON. But ALWAYS ON until it stops oscillating and goes back to 0VDC. I don't mind if it stays 2 or 3 seconds ON when it has already stopped oscillating.
So here's my design. It works, but again I'm not sure I did it right.
I used a 1nF capacitor in order to keep the gate high when the pulse wave is at low state and a diode so it can only discharge through the 100 Ohm resistor and the gate impedance (around 200 MOhm).
Is this right? Is there a better (or simpler) way of doing it?
THANKS!!!
I'm currently designing a simple circuit which is working as I want but I'd like to make sure that I haven't done any dumb mistake. That's why I'm asking here.
I'd like a signal to switch ON a MOSFET in order to activate a relay. This signal is usually low (0 VDC) but sometimes it becomes a pulse train of +3VDC at around 3Hz. That's when I want my MOSFET to be ON. But ALWAYS ON until it stops oscillating and goes back to 0VDC. I don't mind if it stays 2 or 3 seconds ON when it has already stopped oscillating.
So here's my design. It works, but again I'm not sure I did it right.
I used a 1nF capacitor in order to keep the gate high when the pulse wave is at low state and a diode so it can only discharge through the 100 Ohm resistor and the gate impedance (around 200 MOhm).
Is this right? Is there a better (or simpler) way of doing it?
THANKS!!!
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