Recent content by knowledgeseeki

470k 200 1 ohm note: large resistance in front of the gate makes the mosfet switch a lot slower than it should

for 200ohm, 1ohm and 470ohm

yes it repetitively setting and the reference voltage doesn't even fall to -1 it starts from zero reaches a high point and simply oscillates

Because the gate of a mosfet is a capacitor, and the mosfet won't turn on (or off) until it is charged (or discharged). A big resistor will slow it down tremendously.

yes 470 47K or 470k was simply too big and is improper to put such high resistances at the mosfet gate

Thank you so much once again I am having an issue though my output keeps oscillating therefore my mosfet doesnt' stay off because of it. using a bipolar trigger how do i set my hysteresis values to -1V for lower and 3V for upper bipolar trigger is used because this ensures that the...

increasing the 47ohm resistance to 470kΩ did remedy the situation. So can you please explain to me the fault condition i tried to simulate, since it is now obvious the fault condition is not the current in the 200Ω increasing. What is the fault then? Quick question. Before the fault current...

yes i have it triggers correctly when the input is above the upper trigger point the the trigger outputs a low when it falls below the lower trigger point a high so i should change my bipolar trigger to a unipolar trigger ok When you say the mosfet switch opens you mean turn off to...

Thanks carl I am not simulating or going to be building with anything higher than +/- 20V Do you know anything about hybrid circuits i.e. mechanical switch+mosfet switch to interrupt a circuit to help protect it

Oh really wow!... The attached circuit is a hybrid circuit breaker. The voltage controlled switch is used to simulate a mechanical circuit breaker and the Mosfet is to act as my solid state circuit breaker They are both being controlled by the schmitt trigger the point of the circuit...

Thanks yes i want the switch to increase the current through the 1ohm resistor when the switch closes. so that a voltage in the opposite direction is induced and goes into the negative input of my opamp What i actually expected when i caculated it on paper was that when the switch is...

hi, sorry i have been out of touch for a while could you please tell me why in this circuit the 200ohm resistor current drops from 100mA to 80mA when the switch closes at 1ms meanwhile it should increase My entire circuit attached to it would make no sense unless the current in the 200ohm...

no just an exercise still deciding if i want to be an engineer the quad switch was only to be used in simulation but seeing its limitations it still won't have worked. i am using a push switch as my mech switch causing the overcurrent i am using the CD4013B as my flip flop and LM393 as my...

hi, do you know anything on CMOS Quad bilateral switch. I am using this switch instead of a timed switch since the time switch doesn't respond to the Mosfet turning off. About the Mosfet i am using an n-channel i was connecting the mosfet wrong that's why it wasn't working the way i wanted it...

sorry.