Re: [SI-LIST] : Surface Mount Cap Lead Inductance

Mark Randol (
Tue, 11 Aug 1998 15:29:42 -0700

Ray Anderson wrote:
> Way back when I worked at Contel ASC developing 14 GHz freq. multipliers
> sufficiently high frequencies things that are insignificant at lower
> frequencies become very important.

Most of my RFish work is in the 900-2400MHz range (with lower IF's
of course). I've seen the effects recently as low as 8-900MHz, and
I vaguely remember seeing it lower (400-500MHz?) with a large value
(100-200pF?) cap used as a DC block. So we're not talking "white
light" frequency wise. It's still somewhat high frequency for
typical SI, but it's getting close.

At the lower frequencies, say 50-100MHz, we get to relax a bit ;)
Sometimes we still get bit tho', forgetting that electrons will
be electrons even at "DC".

Mark Randol, RF Measurements Engineer   | Motorola SPS, Inc.
(602)413-8052 Voice                     | M/S EL379
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