All Questions
Tagged with nmos simulation
12
questions
0
votes
0
answers
30
views
Multism simulation for NMOS type circuit, why I am not getting the expected graph?
I am trying to simulate my circuit for one of the question problems. The question looks like this
I have written a MATLAB script to see the expected graph
...
0
votes
2
answers
155
views
Vout NMOS CS amplifier LTspice simulation
I've been trying to create this 2 block cs amplifier for a 5V/V gain. The problem is that my Vout is saturated on both cycles, and I do not know why this is happening.
The transistor used is NMOS ...
- 1
1
vote
1
answer
212
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Variation of MOSFETs with same W/L ratio
In MOSFET devices (let's say NMOS for this example), I know that the drain current has a formula:
$$Id=\frac{\mu nC_{ox} }{2}\cdot \frac{W}{L}(V_{GS}-V_{th})^2(1+\lambda V_{DS})$$
For this circuit:
I ...
2
votes
0
answers
104
views
ADS simulation error when inputting a clock in to a D flip-flop through an NMOS switch
A NMOS gate controls when the clock signal is fed into the clock of the D flip-flop.
Below is the NMOS gate schematic and simulation. As we can see, the Vsquare only goes through the NMOS when the ...
- 347
0
votes
0
answers
653
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Body effect on NMOS4 LTSpice simulation
I am trying to observe the effect of a negative voltage on the NMOS4 model in LTSpice. I have a DC sim running and a step parameter for the voltage. However the current curve (and threshold voltage) ...
- 1
0
votes
1
answer
181
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Simulation doubt with Zener diode & MOSFET
I have the below circuit in which I am trying to perform simulations.
Simulation Tool used - Falstad Simulator
12V Zener Diode
Top MOSFET
Bottom MOSFET
Question 1 :
The Zener diode is 12V Rated.
I ...
user220456
4
votes
3
answers
13k
views
Circuit with LTspice default NMOS model does not work as expected
I put together a circuit where I want to switch a load with a nMOSFET, but I get a load current that is unexpectedly low.
I reduced the problem to this circuit:
As can be seen the load current is ...
- 2,803
0
votes
2
answers
316
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NMOS current flowing equally in both directions in SPICE simulation
I am trying to characterize this nmos on Xyce simulator (and trying to change its present Vthreshold) and am first DC sweeping the gate and measuring the current through the nmos.
I run into this ...
- 208
1
vote
1
answer
2k
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Cannot simulate my model on LTSpice
I'm having trouble trying to simulate my NMOS (FDG6301N) on LTSpice.
I have a permanent error telling me
...
- 83
1
vote
1
answer
95
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Why feedback is activating at more than 4V?
In this circuit:
I don't get why the current start flowing from more than 4V. I thought was due to threshold, but the same happens with an NPN as M2 or using an BS170. With this last one, everything ...
- 1,305
-1
votes
2
answers
1k
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Pseudo-Nmos inverter in LTSPICE
In LTSPICE, I've built a pseudo-NMOS inverter and I've got 2 tasks to do using it.
1) I've a initial guess for Wn value of NMOS. I start the simulation with this value however, I need to optimize it ...
- 103
5
votes
2
answers
2k
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PSpice generates gray hair, not correct answers
I have an extremely simple circuit that involves a NMOS, three resistors, and a voltage source. The circuit and info are shown below. Please understand that I could probably analyze this circuit while ...
- 708