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• 15th August 2019, 12:17
I do loadpull for the main amplifier at two points: 1. Just before the peaking amplifier turns on and begins to significantly do "load modulation". ...
5 replies | 294 view(s)
• 13th August 2019, 06:17
The curve that circuitking has shared shows a very wide region of operation. Obtaining matching across such a wide range is quiet difficult....
5 replies | 219 view(s)
• 12th August 2019, 16:46
Can you maybe elaborate on what you mean by "high frequency output power"? If you are referring to higher power at high frequency, then inductive...
5 replies | 219 view(s)
• 12th August 2019, 16:42
Have you tried changing the maxstep parameter in your transient simulation?
2 replies | 296 view(s)
• 7th August 2019, 20:26
I know its not relevant to this thread particularly, but it is particularly relevant to HB not converging for conditionally stable circuits. I...
8 replies | 679 view(s)
• 7th August 2019, 11:35
You only place the gate resistor to make it stable (Kf=1) which means your MAG and MSG are equal. You cannot get a gain more than MSG anyway. This is...
8 replies | 679 view(s)
• 4th August 2019, 16:55
If you go from class A to class C, the gain peaking increases. Also your AM-PM distortion will have in a different way. But going to class C means...
3 replies | 406 view(s)
• 2nd August 2019, 17:26
Is this the paper you are talking about? https://ieeexplore.ieee.org/document/6123581 The abstract itself defines what is meant by linearity.
8 replies | 329 view(s)
• 2nd August 2019, 16:24
Are you sure you need a length of 150u and a width of 0.18u?
32 replies | 1107 view(s)
• 2nd August 2019, 15:57
I just saw the mistake in your figure.. You have a w=0.18u and l=6u!!!! Good luck getting a gain out of that!!! Anyway, I am on vacations and I...
32 replies | 1107 view(s)
• 2nd August 2019, 10:06
These are the issues I can see with your circuit.. 1. That Lbias value of 1nH is quiet low. And anyway your sinevoltage source has a DC value of...
32 replies | 1107 view(s)
• 30th July 2019, 18:40
1 replies | 196 view(s)
• 30th July 2019, 12:33
Check out step 5 from this link: Step 5: Go to Setup (from ADE-L)-> Simulation Files ... , under tab Vector Files , add the file you just created....
6 replies | 399 view(s)
• 30th July 2019, 10:35
Dear friends, Thank you for your help Please forgive my stupid question, I am unable to invoke the vector file, how can I edit or call this file...
6 replies | 399 view(s)
• 29th July 2019, 18:36
There have been quiet a few publications on this, and I request you to look up the work done by Patrick Reynaert on this. Efficiency depends on a...
7 replies | 470 view(s)
• 29th July 2019, 18:16
It does not change only if your gain is infinite. If your gain is finite, it does change. Doesn't it look like a capacitance of value A*C?...
15 replies | 771 view(s)
• 28th July 2019, 03:30
If you want to see how increasing number of LC segments make a closer approximation to transmission line, check out this rather basic paper:...
9 replies | 655 view(s)
• 27th July 2019, 17:26
Yes.. I see your point. I understand my mistake. Y11 = jw(Cgs+Cgd) (because the output would be shorted and both capacitances would come in...
7 replies | 462 view(s)
• 27th July 2019, 16:51
The delay matching by using lumped components using the approach shown in the figure completely disregards the effect of Cbc. Also, Cbe varies quiet...
8 replies | 465 view(s)
• 27th July 2019, 16:43
Both these currents depend upon your load impedance. I normally designed Doherty by first designing the main amplifier, and then the peaking...
5 replies | 358 view(s)
• 27th July 2019, 16:38
The expression for Cin is incorrect. Xc = abs(1/imag(1/zm(1 ?result "sp")) ) Cin = 1 / (Xc*(2*3.14159*xval(zm(1 ?result "sp")))) Xc = 1/jwC ==>...
7 replies | 462 view(s)
• 27th July 2019, 07:42
No.. If you are interested in the input impedance, look at ZM1 and for output impedance, look at ZM2. Not Z parameters. V1 = Z11*I1 + Z12*I2. If you...
7 replies | 462 view(s)
• 27th July 2019, 07:35
Why not? Current aka charges are flowing to one of the plates of the capacitor, and the op-amp drains charges (of the same polarity) from the other...
15 replies | 771 view(s)
• 27th July 2019, 07:21
What he means is that you can only approximate a particular length of transmission line at a particular frequency by lumped components. Placing a...
9 replies | 655 view(s)
• 27th July 2019, 06:59
Loadpull is one of the ways to find an optimum impedance. But because this problem is rather non-linear, why not throw an optimizer at it and see if...
3 replies | 245 view(s)
• 24th July 2019, 15:18
Can't you just skip the output column in the vector file?
6 replies | 399 view(s)
• 24th July 2019, 15:11
The load impedance that gives you a notch for s22 will probably not be the same as the one where you get your maximum PAE. Your optimum impedances...
7 replies | 585 view(s)
• 24th July 2019, 09:51
Dear Vivekroy Thank you for your nice help, I will check to see if my ADE simulator support the UltraSim simulator, meanwhile I read the article,...
6 replies | 399 view(s)
• 24th July 2019, 09:07
Thank you Boss for your reply, I am sorry to tell you I could not find the setting you are referring in your explanation, it would be very kind of...
4 replies | 233 view(s)
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