Impedance calculator: Difference between revisions
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In high frequency PCB designs the impedance of a signal leading medium needs to be recognized. So it is convenient to determine the later width of a track in the layout already in the schematic. This should be possible for single signals or for signal classes as well. It is about the principle of how a strip line should be constructed. ([http://en.wikipedia.org/wiki/Stripline StripLine]). | |||
[[Image:stripline.png|StripLine (Cross section)]]<br>Image: StripLine (Cross section)<br><br> | |||
Open in TARGET 3001! the Impedance calculator either in the dialog ''Edit signal wire'' (Double clock on a signal wire or [e] after having highlighted the signal) or in the dialog ''Edit signal classes'' (menu actions).<br><br> | |||
<table cellpadding="20" border="0"> | |||
<tr> | |||
<td>[[image:impedanzkalkulator1_e.png|300px|The dialog "Signalbahnen ändern"]]<br>Image: Der Dialog: "Signalbahnen ändern"</td> | |||
<td>[[image:impedanzkalkulator2_E.png|300px|The dialog "Signal-Klassen verwalten"]]<br>Image: Der Dialog: "Signal-Klassen verwalten"</td> | |||
</tr> | |||
</table><br><br> | |||
The following terms are of interest: | |||
* The hugeness '''h''' of the dielectric agens the StripLine is embedded to (= the body of the PCB) | |||
* The copper thickness '''t''' of the StripLine | |||
* The permittivity '''<big>ε<sub>r</sub></big>''' of the dilelectric agens | |||
A certain '''Nenn-Impedanz Z''' required, needs resulting from the facts given the required track width '''w''', which can be overtaken to the signal class as standard width.<br><br> | |||
Wird der Streifenleiter gedoppelt verlegt (differential StripLine), spielt zusätzlich der Abstand '''s''' der beiden Leiterbahnen zueinander eine Rolle. Analog wird der geeignete Leiterbahnabstand zusätzlich in die Signalklasse als Standard-Leiterbahnabstand übernommen. | |||
[[Image:stripline_d.png|Der Impedanz-Kalkulator]]<br>Bild: Der Impedanz-Kalkulator berechnet die optimale Leiterbahnbreite und übernimmt den Wert in die Signalklasse<br><br><br><br> | |||
[[Image: | |||
[[en:Impedance calculator]][[de:Impedanz-Kalkulator]][[fr:Calculateur d'impédance]] | [[en:Impedance calculator]][[de:Impedanz-Kalkulator]][[fr:Calculateur d'impédance]] | ||
Revision as of 12:38, 4 June 2014
In high frequency PCB designs the impedance of a signal leading medium needs to be recognized. So it is convenient to determine the later width of a track in the layout already in the schematic. This should be possible for single signals or for signal classes as well. It is about the principle of how a strip line should be constructed. (StripLine).
Image: StripLine (Cross section)
Open in TARGET 3001! the Impedance calculator either in the dialog Edit signal wire (Double clock on a signal wire or [e] after having highlighted the signal) or in the dialog Edit signal classes (menu actions).
 Image: Der Dialog: "Signalbahnen ändern" |
The dialog "Signal-Klassen verwalten" Image: Der Dialog: "Signal-Klassen verwalten" |
The following terms are of interest:
- The hugeness h of the dielectric agens the StripLine is embedded to (= the body of the PCB)
- The copper thickness t of the StripLine
- The permittivity εr of the dilelectric agens
A certain Nenn-Impedanz Z required, needs resulting from the facts given the required track width w, which can be overtaken to the signal class as standard width.
Wird der Streifenleiter gedoppelt verlegt (differential StripLine), spielt zusätzlich der Abstand s der beiden Leiterbahnen zueinander eine Rolle. Analog wird der geeignete Leiterbahnabstand zusätzlich in die Signalklasse als Standard-Leiterbahnabstand übernommen.
Der Impedanz-Kalkulator
Bild: Der Impedanz-Kalkulator berechnet die optimale Leiterbahnbreite und übernimmt den Wert in die Signalklasse
