carlson
01-30-2002, 01:05 PM
I was looking at the WindRiver impedance calculator that's available at:
http://www.pcbstandards.org/downloads/Metric%20Environment/Calculators/Impedance/
When using the Dual Stripline Impedance calculator, I see that the formula that calculates the impedance is: ROUND((80/SQRT(D4))*(LN((1.9*(2*D5+D8))/(0.8*D7+D8))*(1-(D5/(4*(D6+D5+D8))))),2)
The "D5" cell is for "C", the opening between the dual striplines. In the above equation, shouldn't the first two instances of "D5" (i.e. "C") really be "D6" (i.e. "H")?? The third instance of "D5" looks fine.
Anybody know someone at WindRiver I can ask about this?
http://www.pcbstandards.org/downloads/Metric%20Environment/Calculators/Impedance/
When using the Dual Stripline Impedance calculator, I see that the formula that calculates the impedance is: ROUND((80/SQRT(D4))*(LN((1.9*(2*D5+D8))/(0.8*D7+D8))*(1-(D5/(4*(D6+D5+D8))))),2)
The "D5" cell is for "C", the opening between the dual striplines. In the above equation, shouldn't the first two instances of "D5" (i.e. "C") really be "D6" (i.e. "H")?? The third instance of "D5" looks fine.
Anybody know someone at WindRiver I can ask about this?