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Type: Posts; User: pancho_hideboo

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1. ## Thread: Solution of Linear Equation using MATLAB

by pancho_hideboo
Replies
2
Views
1,300

### [SOLVED]Closed: Re: Solution of Linear Equation using MATLAB

d = pinv(A)*b % particular solution
c = eye(size(A, 2)) - pinv(A)*A % homogeneous solutions
fprintf( 2, 'rank(c)=%d\n', rank(c, 1e-5) );
R = rref(c) % reduced row echelon form

t = randn(size(c,...
2. ## Thread: Solution of Linear Equation using MATLAB

by pancho_hideboo
Replies
2
Views
1,300

### [SOLVED]Closed: Re: Solution of Linear Equation using MATLAB

General solution can be given as following.

x = pinv(A)*b + (eye(5)-pinv(A)*A)*[t1,t2,t3,t4,t5].’

https://en.wikipedia.org/wiki/Moore–Penrose_inverse

by pancho_hideboo
Replies
1
Views
606

### Closed: Re: Import S2P file in Cadence Virtuoso

Understand things correctly.
Use correct terminology.

You can never import S2P file to Cadence virtuoso, since Cadence Virtuoso is design frame work.
However Cadence ViVA can open S2P file...
4. ## Thread: Solution of Linear Equation using MATLAB

by pancho_hideboo
Replies
2
Views
1,300

### [SOLVED]Closed: Solution of Linear Equation using MATLAB

A = [ 1, 2, -1, -2, -3;
2, 4, 0, -3, -1;
1, 2, 1, 0, 1;
3, 6, -2, -5, -7;
2, 4, -3, -5, -8]

b = [6, 7, 2, 16, 14].'

size(A)=5x5
rank(A)=3
5. ## Thread: large signal simulation of a wide band amplifier

by pancho_hideboo
Replies
1
Views
353

### Closed: Re: large signal simulation of a wide band amplifier

Of course, wrong.
Port and matching are not required at all.

If your concerns are sinusoidal drive, shooting-newton-pss or HB-pss are suitable.

If your concerns are modulated signal drive,...

by pancho_hideboo
Replies
6
Views
651

### Closed: Re: Gnerate spice netlist from Cadence Spectre schematic

Choose cdsspice as simulator.
7. ## Thread: Including geometric variation of transistors using Montecarlo simulation in Cadence

by pancho_hideboo
Replies
3
Views
684

### Closed: Re: Including geometric variation of transistors using Montecarlo simulation in Cade

Simply use mismatch parameters which include geometrical dependencies.

See https://designers-guide.org/forum/YaBB.pl?num=1276330403
8. ## Thread: nedding help to setup pole zero analyses in cadence

by pancho_hideboo
Replies
3
Views
501

### Closed: Re: nedding help to setup pole zero analyses in cadence

See spectre -h pz

9. ## Thread: nport primitive and VerilogA

by pancho_hideboo
Replies
13
Views
958

### Closed: Re: nport primitive and VerilogA

You can not understand anything regarding unidirectional and bidirectional at all.

And you must not use formulation based on s-parameter, since you can not understand s-parameter.

Still you can...
10. ## Thread: nport primitive and VerilogA

by pancho_hideboo
Replies
13
Views
958

### Closed: Re: nport primitive and VerilogA

Consider block diagram not verilog-A.
That’s all.

BTW, can you surely understand unidirectional model and bidirectional model ?
11. ## Thread: nport primitive and VerilogA

by pancho_hideboo
Replies
13
Views
958

### Closed: Re: nport primitive and VerilogA

Verilog-A has no relation at all.
Simply you are very lack of knowledge of very basic linear circuit theory.

Circuit which is substituted by nport has no direct relation to any of z,y, s.

It...

by pancho_hideboo
Replies
11
Views
1,111

Confirm whether model file surely include statistical descriptions.
13. ## Thread: nport primitive and VerilogA

by pancho_hideboo
Replies
13
Views
958

### Closed: Re: nport primitive and VerilogA

Surely understand nport.
nport can work as any of Z,Y,H,F,S matrix even if file of nport is S-parameter.

Surely learn very basic linear circuit theory before EDA Tool Play.
14. ## Thread: nport primitive and VerilogA

by pancho_hideboo
Replies
13
Views
958

### Closed: Re: nport primitive and VerilogA

No.
Surely learn a definition of S-parameters.

You have to calculate a1,a2,b1,b2 from s11,s12,s21,s22.
That’s all.

It seems you can not understand S-parameter at all as same as many people in...

by pancho_hideboo
Replies
15
Views
2,120

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

No.
Frequency bands can be defined for them, although they are not practical values.
16. ## Thread: nport primitive and VerilogA

by pancho_hideboo
Replies
13
Views
958

### Closed: Re: nport primitive and VerilogA

Simply you can not understand S-parameter at all.

You ignore current. It results in ignorering impedance.
Can you understand energy conservative model and signal flow model ?
17. ## Thread: nport primitive and VerilogA

by pancho_hideboo
Replies
13
Views
958

### Closed: Re: nport primitive and VerilogA

No.

Simply you have mistakes in Verilog-A code or/and Netlist.

Show me both Verilog-A code and Netlist.

18. ## Thread: \$freq while using AC analysis to access lookup table

by pancho_hideboo
Replies
12
Views
1,118

### Closed: Re: \$freq while using AC analysis to access lookup table

Correction.

`include "constants.vams"
`include "disciplines.vams"

module my_freq(out);
output out;
voltage out;

electrical gnd;
19. ## Thread: \$freq while using AC analysis to access lookup table

by pancho_hideboo
Replies
12
Views
1,118

### Closed: Re: \$freq while using AC analysis to access lookup table

`include "constants.vams"
`include "disciplines.vams"

module my_freq(out);
output out;
voltage out;

electrical gnd;
ground gnd;
20. ## Thread: \$freq while using AC analysis to access lookup table

by pancho_hideboo
Replies
12
Views
1,118

### Closed: Re: \$freq while using AC analysis to access lookup table

Compare CDF parameter and spectre -h nport.

Or simply use gnd node in Verilog-A.
Ground node declaration.
21. ## Thread: \$freq while using AC analysis to access lookup table

by pancho_hideboo
Replies
12
Views
1,118

### Closed: Re: \$freq while using AC analysis to access lookup table

If you insist on Verilog-A, instantiate spectre’s primitive nport in Verilog-A.

https://designers-guide.org/forum/YaBB.pl?num=1574240440#2

Other possibility is “deriv(ac_stim(1))/(M_TWO_PI)”.
...

by pancho_hideboo
Replies
2
Views
425

### Closed: Re: SystemVerilog Behavioral Simulation in Cadence Virtuoso/AMS/Incisive/Spectre

https://designers-guide.org/forum/YaBB.pl?num=1574282166

Use file name of “*.sv”.

Surely understand basic things correctly before EDA Tool Play.
This is very true for all your previous posts.
23. ## Thread: \$freq while using AC analysis to access lookup table

by pancho_hideboo
Replies
12
Views
1,118

### Closed: Re: \$freq while using AC analysis to access lookup table

Use spectre primitive, nport.

If you use Keysight ADSsim, use DAC(Data Access Component).

24. ## Thread: \$freq while using AC analysis to access lookup table

by pancho_hideboo
Replies
12
Views
1,118

### Closed: Re: \$freq while using AC analysis to access lookup table

If you mean Verilog-A, \$freq is not available in Verilog-A.

25. ## Thread: Spectre RF Envelope Simulation for Wireless Transmitter with Switched-Cap Baseband

by pancho_hideboo
Replies
1
Views
277

### Closed: Re: Spectre RF Envelope Simulation for Wireless Transmitter with Switched-Cap Baseban

Simply do one tone(LO) envelope analysis.
fs and DAC output are treated as baseband signal.
That’s all.
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