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Type: Posts; User: pancho_hideboo

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1. ## Thread: Diagonalization of Impedance Matrix

by pancho_hideboo
Replies
5
Views
408

### Closed: Re: Diagonalization of Impedance Matrix

Z = [2, j, 0;
j, 2, j*2;
0, j*2, 2]

This [Z] is neither Hermitian, Skew-Hermitian nor Unitary, yet it is Symmetric and Normal.
This [Z] can be diagonalized by Orthogonal...
2. ## Thread: Diagonalization of Impedance Matrix

by pancho_hideboo
Replies
5
Views
408

### Closed: Re: Diagonalization of Impedance Matrix

Not useful at all.
3. ## Thread: Diagonalization of Impedance Matrix

by pancho_hideboo
Replies
5
Views
408

### Closed: Re: Diagonalization of Impedance Matrix

I know such very basic thing.

No. [Z] is not a Hermitian matrix.

Here [Z]T means transpose of [Z], [Z]+ means conjugate transpose of [Z].

For lossless reciprocal circuit, [Z] is a pure...
4. ## Thread: how to get higher P1dB,in point

by pancho_hideboo
Replies
2
Views
197

### Closed: Re: how to get higher P1dB,in point

High bias current and low load impedance.

by pancho_hideboo
Replies
9
Views
575

### Closed: Re: Loadpull for Differential PA

Can you understand differential circuit ?

No. There is no coupling between L.
Can you understand actual transformer ?

Ideal transformer is not...
6. ## Thread: Problem in saving data during DC sweep simulation in Cadence Virtuoso

by pancho_hideboo
Replies
7
Views
445

### Closed: Re: Problem in saving data during DC sweep simulation in Cadence Virtuoso

Show me netlist when you invoke parametric sweep.
7. ## Thread: Problem in saving data during DC sweep simulation in Cadence Virtuoso

by pancho_hideboo
Replies
7
Views
445

### Closed: Re: Problem in saving data during DC sweep simulation in Cadence Virtuoso

DC Analysis is not required.

Or enclose ac analysis statement by sweep statement in netlist.
8. ## Thread: Diagonalization of Impedance Matrix

by pancho_hideboo
Replies
5
Views
408

### Closed: Diagonalization of Impedance Matrix

Generally an impedance matrix [Z] is a complex symmetrical matrix.
It is neither a real symmetrical matrix nor a Hermitian matrix.

However a complex impedance matrix [Z] can be diagonalized.
I...
9. ## Thread: Too large .psf file generated by Post layout simulation using Spectre

by pancho_hideboo
Replies
1
Views
190

### Closed: Re: Too large .psf file generated by Post layout simulation using Spectre

I can not understand what you want to mean at all.
Describe correctly.

Show me netlist.
Here I don’t require circuit description.

by pancho_hideboo
Replies
5
Views
420

### Closed: Re: Impedance Calculation

Drive by current source of known value.
11. ## Thread: How the stability analysis in analog and RF design related?

by pancho_hideboo
Replies
3
Views
299

### Closed: Re: How the stability analysis in analog and RF design related?

No relation, although I don’t know what you mean by “delta”.
https://designers-guide.org/forum/YaBB.pl?num=1218635777/5#5
https://designers-guide.org/forum/YaBB.pl?num=1190272820
12. ## Thread: Input referred noise simulation for OP-amp

by pancho_hideboo
Replies
5
Views
357

### Closed: Re: Input referred noise simulation for OP-amp

They are same in small signal noise simulation.
However close loop configulation such as voltage follower is required in actual measurement not EDA Tool Play.
13. ## Thread: Natural frequency of second order system

by pancho_hideboo
Replies
1
Views
216

### Closed: Re: Natural frequency of second order system

No one can understand what you want to mean.
Describe correctly.

If you mean “standard form” as “state variable formulation”, solve eigenvalue.
14. ## Thread: Input referred noise simulation for OP-amp

by pancho_hideboo
Replies
5
Views
357

### Closed: Re: Input referred noise simulation for OP-amp

Input reference noise is an intrinsic value of OPAmp.

So they are same as far as feedback does not change DC operation point and does not generate noise.

by pancho_hideboo
Replies
13
Views
805

### Closed: Re: Question about RF power meter

It is not circuits.

What band of frequency do you want to detect ?
16. ## Thread: RF Energy Harvesting Power Source

by pancho_hideboo
Replies
9
Views
644

### Closed: Re: RF Energy Harvesting Power Source

Show me netlist.
I don't think your setting is for differential drive.

It seems you can not understand power definition at all.

If you don't know input impedance of rectifier, you can not know...

by pancho_hideboo
Replies
13
Views
805

### Closed: Re: Question about RF power meter

by pancho_hideboo
Replies
2
Views
265

### Closed: Re: In-band image problem for low-IF receiver

IQ-downmixer with polyphase filter or analog complex filter

IQ-downmixer following IQ-ADC, and use digital complex filter
19. ## Thread: RF Energy Harvesting Power Source

by pancho_hideboo
Replies
9
Views
644

### Closed: Re: RF Energy Harvesting Power Source

No.
Even if averaged powers are same for modulated signal and non-modulated signal, outputs of rectifier are different for them.

So you can not know rectifier output for Wifi signal with...
20. ## Thread: Color Font in MATH Editor of Open Office

by pancho_hideboo
Replies
3
Views
317

### Closed: Re: Color Font in MATH Editor of Open Office

Color mapping is odd in OpenOffice-4.1.6.

On the other hand, LibreOffice-6.2.5.2 is good.

Is this odd color mapping ordinary in OpenOffice ?
21. ## Thread: Color Font in MATH Editor of Open Office

by pancho_hideboo
Replies
3
Views
317

### Closed: Re: Color Font in MATH Editor of Open Office

However I found out more direct method.
https://wiki.openoffice.org/wiki/Documentation/FAQ/Formula/How_do_I_change_the_color_of_a_subformula%3F
22. ## Thread: Captured field by Array Antenna

by pancho_hideboo
Replies
16
Views
705

### Closed: Re: Captured field by Array Antenna

Still you can not understand.
I understand such basic things.

All elements are not active at same time.

Only one element is active each time.

Rarher concept is close to SAR(Synthetic...
23. ## Thread: Captured field by Array Antenna

by pancho_hideboo
Replies
16
Views
705

### Closed: Re: Captured field by Array Antenna

Not beam forming.
It is not phased array antenna.

...
24. ## Thread: Captured field by Array Antenna

by pancho_hideboo
Replies
16
Views
705

### Closed: Re: Captured field by Array Antenna

No.
Elements 1, 2 and 3 are not sampled at same time.

Consider phase of complex baseband signal not RF signal at Receiver.
25. ## Thread: Color Font in MATH Editor of Open Office

by pancho_hideboo
Replies
3
Views
317

### Closed: Color Font in MATH Editor of Open Office

Can I change color of font in MATH Editor of Open Office or Libre Office ?
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