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Highlights from
Linear 2-port Circuit Simulator

ABCD=Y_to_ABCD(Y) Convert Y parameters to ABCD parameters
ABCD=Z_to_ABCD(Z) Convert Z parameters to ABCD parameters
ABCD=par_c(f,value) Parallel Capacitor to GND
ABCD=par_l(f,value) Parallel inductor to GND
ABCD=par_r(f,value) Parallel Resistor to GND
ABCD=parallel_combine(ABCD1,A... This function takes two ABCD matrices, and combines them in parallel using
ABCD=ser_c(f,value) Series Capacitor
ABCD=ser_l(f,value) Series Inductor
ABCD=ser_r(f,value) Series resistor
ABCD=tform(f,value) This is an ideal transformer, ratio VALUE:1. That means that from the
ABCD=tline(f,Z0,R,C,length_ca... Lossy Non-ideal Transmission Line. Usage:
ABCD_Flip=flip_ABCD(ABCD) This function flips a ABCD matrix. ABCD is a matrix not a cell.
ABCD_f=cascade_combine(ABCD_C... This function implements a cascade combination of ABCD matrcies
ABCD_to_S(f,ABCD,Zo) Convert ABCD matrix to Scattering Parameters.
Amplifier(f,Gain,Vnoise,Inois... Model for an ideal amplifier.
C=PassiveABCD_to_Correlation(... Find the correlation noise matrix for a passive component.
CABCD=Noise_CY_to_CABCD(C,ABC... Convert Noise Correlation Y Matrices to Noise Correlation ABCD matrices.
CY=Noise_CABCD_to_CY(CABCD,Y) Convert Noise Correlation ABCD matrices to Noise Correlation Y Matrices
Example_Simplex Simplex Optimizer Example:
Noise_OC(ABCD,CABCD) This function calculates the open circuit noise for an ABCD and
P=PowerIntoCell(ABCD_Cell,Cel... This function calculates the power flowing into a cell. RMSVinput is the
V=VoltageAtCell(ABCD_Cell,Cel... Find the voltage at the input of a cell. This is normalized to a 1v input
Y=ABCD_to_Y(ABCD) Convert ABCD parameters to Y parameters
Z=ABCD_to_Z(ABCD) Convert ABCD parameters to Z parameters
Z=ImpedanceIntoCell(ABCD_Cell... Calculate the impedance looking into a cell
[ABCD, CABCD]=parallel_combin... This function takes two ABCD matrices, and combines them in parallel using
[ABCD_OUT,C_OUT]=cascade_comb... Combine ABCD circuitry and noise matrices in a cascade.
[f,ABCD]=S_to_ABCD(S_Params,Z... Convert 2-port scattering parameters to ABCD parameters
[p,z,v,itercount,func_evals]=... SIMPLEXE Multidimensional unconstrained nonlinear minimization (Nelder-Mead)
Contents.m
Example.m
Example_Noise.m
Example_Noise2.m
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Linear 2-port Circuit Simulator

by Brett Bymaster

11 May 2005 (Updated 12 May 2005)

Linear circuit simulator using network analysis, useful for analog and RF, including noisy 2-ports.

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Description

Linear 2-port Simulator:

This simulator uses network analysis to simulate linear 2 port circuits. The primary mode of simulation is cascaded ABCD matrices. Parallel combinations are also supported. Supports conversions to and from the following formats: S-Parameters, Y-Parameters, Z-Parameters, and ABCD-Parameters.

Noisy two-ports are supported using correlation matrices. This allows for uncorrelated, partially correlated or completely correlated noise and current sources to be included in the network analysis. For example, a noisy active amplifier can be simulated in a linear cascade chain to find the overall combined noise from the amplifier and other passive components.

An example of simplex circuit optimization is included utilizing network matrices.

MATLAB release

MATLAB 7 (R14)

Other requirements

Limited to R14 due to sloppy coding. May make it compatible with R12 if I get around to it.

Tags for This File
Everyone's Tags	2port, abcd, electronics, network ana, scattering parameter(2), sparameter, two port
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Comments and Ratings (3)
03 Sep 2006	Reaz Uddin	It's Really Interesting...... Also Very good.......
31 Oct 2006	mouna mouna	evident
16 Sep 2008	Maurice Clennon	Very useful, I will be modifying the file to add dependent current or voltage sources. Good Job

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Tag Activity for this File
Tag	Applied By	Date/Time
electronics	Brett Bymaster	22 Oct 2008 07:48:20
abcd	Brett Bymaster	22 Oct 2008 07:48:20
sparameter	Brett Bymaster	22 Oct 2008 07:48:20
scattering parameter	Brett Bymaster	22 Oct 2008 07:48:20
2port	Brett Bymaster	22 Oct 2008 07:48:20
two port	Brett Bymaster	22 Oct 2008 07:48:21
network ana	Brett Bymaster	22 Oct 2008 07:48:21
scattering parameter	Patrick Maitre	30 Aug 2011 11:01:27

Highlights from Linear 2-port Circuit Simulator

Linear 2-port Circuit Simulator

Highlights from
Linear 2-port Circuit Simulator