Cable Asylum

no.

130.199.3.130

In Reply to: RE: I looked up the precision link IC's..weird posted by JB on June 29, 2007 at 06:37:26

91 ohms is the characteristic impedance of the cable. This is not the same as the resistance of the wires within the cable, so multiplying by the length does not make any difference in that number. It's like a 75 ohm cable wire, no matter how long you use, the cable impedance will still be 75 ohms.

You'll have to ask Al about what he was talking about, and how you should scale the numbers to meet the impedances you wish. At 150k, you'd have to scale the parts by 10 thousand or so to get the same effect, which I'm not sure what he is looking to do.

Cheers, John

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