A 3dB Attenuator is simulated with and without parasitic capacitance. Two plots are shown, one the the ideal and the other with the parasitics considered.
Last active
May 29, 2019 19:32
-
-
Save JerryWiltz/6d2ea0066b4e2b4433ec3566663c2662 to your computer and use it in GitHub Desktop.
Attenuator Comparison
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| license: gpl-3.0 | |
| height: 600 | |
| scrolling: yes | |
| border: yes |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>3dB Attenuator with and without Parasitics</title> | |
| </head> | |
| <body> | |
| <svg id="chart1" width="600" height="400"></svg> | |
| <img src='AttenuatorParasitic.png'></img> | |
| <script src="https://cdn.jsdelivr.net/gh/JerryWiltz/nP@latest/dist/nP.js"></script> | |
| <script> | |
| // generate frequency list | |
| g = nP.global; | |
| g.fList = g.fGen(50e6, 6e9, 101); | |
| // define the 3 dB attenuator | |
| var R1 = nP.paR(292); | |
| var R2 = nP.seR(18); | |
| var R3 = nP.paR(292); | |
| var Attenuator = R1.cas(R2).cas(R3); | |
| // define the output of an ideal attenuator and add to the plot in lineChart below | |
| var AttenuatorOut = Attenuator.out('s21dB'); | |
| // add the parasitic capacitances | |
| var cParasitic = nP.paC(0.5e-12); | |
| // add the parasitics to the input and outputs sides of the Attenuator | |
| var AttenuatorWithParasitics = cParasitic.cas(Attenuator).cas(cParasitic); | |
| // define the output with the effect of the parasitics | |
| var AttenuatorWithParasiticsOut = AttenuatorWithParasitics.out('s21dB'); | |
| // set up the lineChartInputObject, notice there are two input tables for two plots | |
| var fullInputObject = { | |
| inputTable: [AttenuatorOut, AttenuatorWithParasiticsOut], | |
| chartID: 'chart1', | |
| metricPrefix: 'giga', | |
| titleTitle: 'Comparison of 3dB Attenuator with and without 0.5 pF parasitic capacitance', | |
| xAxisTitle: 'Input Frequency, GHz', | |
| yAxisTitle: 's21, dB', | |
| xRange: [0,6e9], | |
| yRange: [0,-6], | |
| showPoints: 'hide', | |
| showLables: 'show' | |
| }; | |
| // plot the attenuator responses | |
| nP.lineChart(fullInputObject); | |
| </script> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment