Article View: sci.electronics
Article #10068Re: RE Descrambler
From: William K. McFadden
Date: Mon, 11 Feb 1991 16:55
Date: Mon, 11 Feb 1991 16:55
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1570 bytes
In article <1991Feb9.233031.25283@sactoh0.sac.ca.us> jhp@sactoh0.sac.ca.us (Jim H. Puga) writes:
>I've finally decided to build the descrambler and have a quick
>question. What does NPO stand for on capacitors? Is there
>anything I should know before I start building this thing?
It refers to the temperature characteristic of a ceramic capacitor.
NP0 stands for "negative-positive zero," which means that the
capacitance is not supposed to vary (much) with temperature. This is
the best kind of temperature compensating capacitor.
There are also non-temperature compensating types, which are used in
applications where the value isn't critical (e.g., decoupling caps).
One such type is Z5U. Z5 indicates a +10C to +85C temperature range,
and U means +22%/-56% max. capacitance range over temperature.
--
Bill McFadden Tektronix, Inc. P.O. Box 500 MS 58-639 Beaverton, OR 97077
bill@videovax.tv.tek.com, {hplabs,uw-beaver,decvax}!tektronix!videovax!bill
Phone: (503) 627-6920 "SCUD: Shoots Crooked, Usually Destroyed"
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cmcl2!yale!hsdndev!wuarchive!uunet!zephyr.ens.tek.com!orca.wv.tek.com!flutter!bill From: bill@flutter.tv.tek.com (William K. McFadden) Newsgroups: sci.electronics Subject: Re: RE Descrambler Keywords: descrambler, caps Message-ID: <10080@orca.wv.tek.com> Date: 11 Feb 91 16:55:11 GMT References: <1991Feb9.233031.25283@sactoh0.sac.ca.us> Sender: news@orca.wv.tek.com Distribution: usa Organization: Tektronix TV Products Lines: 18