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From: jeffw@midas.TEK.COM (Jeff Winslow)
Newsgroups: sci.electronics
Subject: Re: Choosing Cap Size in Power Supply
Message-ID: <1684@midas.TEK.COM>
Date: Tue, 4-Aug-87 12:11:21 EDT
Article-I.D.: midas.1684
Posted: Tue Aug  4 12:11:21 1987
Date-Received: Fri, 7-Aug-87 01:31:25 EDT
References: <5705@ut-ngp.UUCP> <1884@kitty.UUCP> <935@sdcc7.ucsd.EDU> <1666@midas.TEK.COM> <642@neoucom.UUCP>
Reply-To: jeffw@midas.UUCP (Jeff Winslow)
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 21

In article <642@neoucom.UUCP> wtm@neoucom.UUCP (Bill Mayhew) writes:

>To respond to Jeff at Tektonix...

Fair enough. Maybe we should preface articles with the range of frequencies
we intend to talk about - most aluminum electrolytics are inductors above
a few hundred kHz (and some considerably lower).

But you have my company name confused with some geophysical theory or other...

:-)

>Tantalum capacitors are polarized capacitors that have a large
>capacitance versus size ratio, giving them low inductance.  The
>disadvantage of tantalum capacitors is that they are expensive and
>tend to be available in only low voltage ratings. 

There's also a controversy about whether their limited surge current
capability affects their reliability in bypassing applications.

					Jeff Winslow