![]() linearcontrolled sources and noise generators embedded in subcircuits is introduced. Is this expected behavior? I have not looked "under the hood" at all, but I was hoping this would work without much debugging. This paper outlines the evolution of the Qucs device modeling and. The following four images are: (1) setup showing 180-degree on left, 90-degree on right, 0 corr for both sources, (2) results, (3) setup with corr of 1 for 180-degree and +j for 90-degree, (4) results NOTE: This is a narrowband design, so it only REALLY works at the design frequency, which is 1.8GHz in this case. The imaginary portion as detected by the 90-degree hybrid is always zero no matter what coefficient I put in. As you can see the last row which has been added by the VCCS. The new unknown variable must be considered by the four remaining simple equations. 9.8, is determined by the following equation which introduces one more unknown in the MNA matrix. Unfortunately, complex or purely imaginary correlation coefficients do not have the expected results. The voltage-dependent current source (VCCS), as shown in fig. Incorrect Correlated Voltage Noise Source Behavior. ![]() 2 Name voltage in Volts Default Value Mandatory yes. Contribute to Qucs/qucs development by creating an account on GitHub. Circle(s) with constant available power gain Ga in the source plane GpCircle(s,Gp,arcs). The results are as-expected for the 180-degree hybrid, meaning that when I add a real number to the correlation coefficient, the noise sources behave correctly. Using Qucs in Textmode 1 Sources DC Voltage Source V:Name Node1 Node2 Parameters Parameter U 4.3. Qucs - Quite Universal Circuit Simulator. I was hoping to see the change in output power (which is proportional to the real and imaginary parts of the cross-correlation) as I changed the normalized cross-correlation coefficient. Contents 1 Scattering parameters 7 1.1 Introduction and denition. Anyway, I have a simple test set up where I have a correlated voltage noise sources object connected to ports 1 and 4 of a hybrid. I tested with ADS and got the correct results. Pure digital simulations are also supported. DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. The software aims to support all kinds of circuit simulation types, e.g. This may not be the most standard way to test the correlation, but it works. Qucs is a circuit simulator with graphical user interface. This technique was first published by Scott Wedge in the early 90's if you're interested. This can be accomplished with a 180degree hybrid (real part) and a 90degree hybrid (imaginary part). I'm trying to test a few circuits that can separate the real and imaginary parts of the cross-correlation of two noise sources.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |