Hey,
So I am given a task to design an amplifier with a current source which I have to design as well (but for now, I just want the amplifier to work, so I have used the default IDEAL CURRENT SOURCE symbol and set a value for it).
Do you guys have any tips? I have posted some pictures below of my circuit and simulation results.. any pointers? What should I use for my width and lengths for each transistor (because they are default right now)? I'm completely lost and any first step pointers would be appreciated.
I will outline my steps thus far:
1) Designed a simple amplifier with a ideal current source.
2) Left the W/L ratio as default (L = 100u, W = 120u).
3) Set VDC for the VDD to 1.8V
4) Set Ideal current source to 15uA
5) Ran a DC Sweep (For variable VIN from -1.5 to 1.5 with 0.01 step size (linear))
6) Outputs to be plotted are: + terminal for VIN and -VIN and the OUT pin.
What am I doing wrong? I dont even know if the results below are correct... any tips to check?
So I am given a task to design an amplifier with a current source which I have to design as well (but for now, I just want the amplifier to work, so I have used the default IDEAL CURRENT SOURCE symbol and set a value for it).
Do you guys have any tips? I have posted some pictures below of my circuit and simulation results.. any pointers? What should I use for my width and lengths for each transistor (because they are default right now)? I'm completely lost and any first step pointers would be appreciated.
I will outline my steps thus far:
1) Designed a simple amplifier with a ideal current source.
2) Left the W/L ratio as default (L = 100u, W = 120u).
3) Set VDC for the VDD to 1.8V
4) Set Ideal current source to 15uA
5) Ran a DC Sweep (For variable VIN from -1.5 to 1.5 with 0.01 step size (linear))
6) Outputs to be plotted are: + terminal for VIN and -VIN and the OUT pin.
What am I doing wrong? I dont even know if the results below are correct... any tips to check?
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