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1. Thread: Two IP3 related question

by pancho_hideboo
Replies
6
Views
146

Closed: Re: Two IP3 related question

Multitone HB Analysis is based on aperiodic function expansion.

Formulation of Keysight ADSsim uses Freq[1] as special meaning.
This is dragging from MDS which is ancestor of ADS.

See...
2. Thread: What is the definition of the efficiency in energy harvesting circuit ??

by pancho_hideboo
Replies
4
Views
93

Closed: Re: What is the definition of the efficiency in energy harvesting circuit ??

See datasheet of https://e-peas.com/types/energy-harvesting/
3. Thread: What is the definition of the efficiency in energy harvesting circuit ??

by pancho_hideboo
Replies
4
Views
93

Closed: Re: What is the definition of the efficiency in energy harvesting circuit ??

It depends on what energy you use.

Solar, Vibration, Thermal, RF, etc.
4. Thread: Two IP3 related question

by pancho_hideboo
Replies
6
Views
146

Closed: Re: Two IP3 related question

Local frequency has to be Freq[1] in Keysight ADSsim.

Show me netlist regarding HB Analysis settings.
I want to know order and maxorder.

Try followings as Test.
Freq[1]=2436 MHz (Local...
5. Thread: Stability of a circuit and its role in design steps

by pancho_hideboo
Replies
3
Views
245

Closed: Re: Stability of a circuit and its role in design steps

You have to learn followings.

- Uncoditionally Stable
- Conditionally Stable

See https://designers-guide.org/forum/YaBB.pl?num=1218635777/0#5

Conditionally Stable.

Large width results in...
6. Thread: Two IP3 related question

by pancho_hideboo
Replies
6
Views
146

Closed: Re: Two IP3 related question

It depends on application of your LNA.

For example, you can use input power at almost 1dB gain compression point, if your LNA application is narrowband and there is no adjacent channel.

It...

by pancho_hideboo
Replies
5
Views
143

Closed: Re: PAE contours in Cadence spectre

Do you design ?
Isn't it EDA Tool Play ?
8. Thread: Rational Approximation of Gaussian LPF

by pancho_hideboo
Replies
6
Views
290

[SOLVED]Closed: Re: Rational Approximation of Gaussian LPF

I can get same result as ADS.

function [z, p, k] = my_gaussianap(order, wp, Ap_dB)
s = tf('s');
T2 = 0;
for n = 0:order
T2 = T2 + (-1)^n * s^(2*n) / factorial(n);
end

z = zero(T2);

by pancho_hideboo
Replies
5
Views
143

Closed: Re: PAE contours in Cadence spectre

Surely understand general note in https://www.edaboard.com/showthread.php?384620#35

- Don't mix up Simulation with Post Processing.
They are completely different phase.

Contour plots are...
10. Thread: Rational Approximation of Gaussian LPF

by pancho_hideboo
Replies
6
Views
290

[SOLVED]Closed: Re: Rational Approximation of Gaussian LPF

Thanks for good clue.

I think they are opposite.

Why does top(odd order case) have zero at s=0 ?

I can calculate Taylor series expansion of exp(p^2), as eq. (13-73) in start of this thread...
11. Thread: Rational Approximation of Gaussian LPF

by pancho_hideboo
Replies
6
Views
290

[SOLVED]Closed: Re: Rational Approximation of Gaussian LPF

Attached figures show characteristics of Gaussian-LPF and Bessel-LPF in Keysight ADS.
S(2,1), delay(2,1) : Gaussian-LPF
S(4,3), delay(4,3) : Bessel-LPF

I know what polynomials are used for...
12. Thread: Even Order Elliptic LPF

by pancho_hideboo
Replies
2
Views
234

Closed: Re: Even Order Elliptic LPF

We can get LC values for even order case with applying such frequency conversion in the following.
https://rf-tools.com/lc-filter/
13. Thread: Selection of Zeros of S11(s)

by pancho_hideboo
Replies
0
Views
75

Closed: Selection of Zeros of S11(s)

We can determine S11(s) from S21(s).

S11(s)*S11(-s) = 1 - S21(s)*S21(-s)
Zin(s) = {1 + S11(s)} / {1 - S11(s)} or
Zin(s) = {1 - S11(s)} / {1 + S11(s)}

Here two options exist for S11(s).
(1)...

by pancho_hideboo
Replies
5
Views
229

No.

spectre is not located there.

Enter “which spectre” in Linux prompt.
Then show me result.

by pancho_hideboo
Replies
5
Views
229

Show me location of “spectre”.

Enter getShellEnvVar("PATH") in CIW.
Show me result.

by pancho_hideboo
Replies
23
Views
774

[SOLVED]Closed: Re: Drawing simple Data in Smith ADS smith Chart

It seems that you can understand what you plot in a start of this thread, https://www.edaboard.com/showthread.php?384833#1
ADS simply plots minimum=0.1+j*0 and maximum=3.0+j*0.

It was very long...

by pancho_hideboo
Replies
23
Views
774

[SOLVED]Closed: Re: Drawing simple Data in Smith ADS smith Chart

You are still misunderstanding.
And you can not understand both ADS and Smith Chart at all.

Wrong.

Full circles and Partial circles are no more than sub grids for ADS Plot.

by pancho_hideboo
Replies
2
Views
154

by pancho_hideboo
Replies
2
Views
154

I don’t know what postprocessing tool you use.

However almost all postprocessing tool have ability of X-Y plot.
Use X-Y plot.

If you prefer static load line, do DC analysis.
If you prefer...
20. Thread: measuring the parasitic capacitance at a certain node in cadence

by pancho_hideboo
Replies
7
Views
209

[SOLVED]Closed: Re: measuring the parasitic capacitance at a certain node in cadence

What do you want to mean ?
Describe correctly with correct terminology.

If you use Cadence Spectre, use "info what=captab" analysis in Cadence Spectre.

Surely see...

by pancho_hideboo
Replies
23
Views
774

[SOLVED]Closed: Re: Drawing simple Data in Smith ADS smith Chart

However this thread's issue is software implementation.

See attached figure.

Very fortunately it is simply drawing any complex value aho.

boke=(1+aho)/(1-aho)
Marker calculates and shows...
22. Thread: measuring the parasitic capacitance at a certain node in cadence

by pancho_hideboo
Replies
7
Views
209

[SOLVED]Closed: Re: measuring the parasitic capacitance at a certain node in cadence

I don't know what you want to mean by "in a schematic in cadence" at all.

However Synopsys HSPICE have following.

.OPTION CAPTAB
Adds up all the capacitances attached to a node and prints a...
23. Thread: Response of the TLINE for different frequencies and lengths

by pancho_hideboo
Replies
11
Views
339

Closed: Re: Response of the TLINE for different frequencies and lengths

You may use "sp Analysis" instead of "ac Analysis".

"test_circuitslave_2.scs"
// Generated for: spectre
// Generated on: Jun 17 11:59:19 2019
// Design...
24. Thread: Response of the TLINE for different frequencies and lengths

by pancho_hideboo
Replies
11
Views
339

Closed: Re: Response of the TLINE for different frequencies and lengths

You may use ".LIN Analysis" instead of ".AC Analysis".

"test_circuitslave_1.spi"
** Generated for: hspiceD
** Generated on: Jun 17 11:47:47 2019
**...

by pancho_hideboo
Replies
37
Views
1,617

Closed: Re: Confused - transmission line component in Virtuoso and ADS

It gives correct value if port impedance is pure real number.
However it never gives correct value, if port impedance is complex number.