On Mon, 5 Dec 2005 17:14:15 GMT, Andy Cowley
wrote:
RST Engineering (jw) wrote:
Agreed, John, 150 MHz is damned near DC for a lot of us, but as yet I have
no answer from the "spice" folks for the 1 nf capacitor question. A lot of
fancydancing but no answers.
Try them on a toroidal inductor, even at HF. I have good reason to
believe they won't have anything like a model to predict self
capacitance/resonance.
vy 73
Andy, M1EBV
Model making is driven by need. 1nF capacitors don't exist on-chip
(at least not very often
, so I don't have a model. But I have
built a model of a wirebond that is good up into the 3GHz range.
...Jim Thompson
--
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