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My advice:
Perseverance. Do not expect that you will be given a ton of independence on day 0. People need to trust you before they will give you responsibility. One mistake on your part can cost a company millions.
Read, read and read. There is no substitute for reading papers. Recreate the...
I am not going to edit your code for you. Sorry but that is not happening.
You need to find the parameters of the third order equation that describes the non-linear behavior. For that you would need the input 1dB compression point in terms of voltage. Once you have that, you can get the...
Well, if you have two ideal current sources connected in series, and you are controlling the current through one of them, then you have an infinite gain amplifier. Throw in the output transconductance of the current sources, and you have a finite gain and then it should be fine.
If it is a real variation, as opposed to a possible model issue described above, then your only solution would be to calibrate. 200fs is not trivial though.
You should short the inputs and connect it to a voltage source. Put in the appropriate DC voltage, put in AC Magnitude as 1 and sweep the frequency through an AC simulation.
If there are no systematic mismatches, then Vo+ and Vo- will show identical output. Else you will see a difference in the...
module opamp_nonlinear(in_p,in_n, out_p,out_n,vcm_out);
voltage in_p, in_n,out_p,out_n,vcm_out;
parameter real Rin = 50 from (0:inf];
parameter real Rout = 50 from (0:inf];
parameter real Gp_dB = 10 from [-100:100];
parameter real a2 = 0 from [0:inf];
parameter real IP1dB =0 from [-100:100]...
How are you measuring the drain current in simulation?
How are you measuring Pin in your lab measurements? Are you actually measuring the input power to your amplifier or is it the setting on your instrument? The reason I ask this is because your S11 is very poor.
PDKs with RF ”devices” are normal transistors but with additional modelling like the substrate, a more exhaustive gate model etc. There are also more restrictions on how these devices can be placed.
Yes, I do see that the inputs are differential. Please see the attached image and my reasoning behind using a single ended probe. It appears each of the terminals of the differential input can be turned off/ac coupled or dc coupled. Am I missing something obvious here?
Thanks FvM.
I did not follow the last line. Can you please explain it?
A side query, it looks like the terminals of the differential input can be turned off (connected to GND) from the schematics. Do you reckon I can use single ended probes by turning it off?
Folks,
I have come to seek your help. I found this really old HP1200B oscilloscope. It was literally free. I got it. I am looking for probes for it. It does not appear to be using the standard BNC or SMA connector. Here is a picture.
Can anyone tell me what type of connector is this?
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