one for the theorist

[Martin Czech]

:::My book, "Noise Reduction Techniques In Electronic Systems" by Henry Ott, shows
:::the inductance of a wire above a ground plane to be:
:::
:::L = (u / 2pi) * Ln(4h/d)    Henrys/meter
:::
:::where:	u = permeability in free space = 4pi * 10e-7
:::	d = diameter of wire
:::	h = distance from ground plane
:::	
:::Examples:
:::	26 Ga wire 1" from ground plane = 0.028 uH per inch
:::	20 Ga wire 0.25" from ground plane = 0.017 uH per inch
:::
:::Not a lot of inductance here. Just think of it as a 1/2 turn air-core inductor.
:::
:::> 

Yeah, ground plane: this is the back path. I've got no problem with
such an arrangement, but ity may be difficult to compute.

m.c.