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From: qwerty@drutx.ATT.COM (Brian Jones)
Newsgroups: sci.electronics
Subject: Re: Appropriate use of capacitors
Message-ID: <4835@drutx.ATT.COM>
Date: Fri, 7-Aug-87 12:52:26 EDT
Article-I.D.: drutx.4835
Posted: Fri Aug  7 12:52:26 1987
Date-Received: Sun, 9-Aug-87 03:49:49 EDT
References: <1108@rtech.UUCP> <3718@watdcsu.waterloo.edu>
Organization: AT&T, Denver
Lines: 23
Keywords: capacitor
Summary: Tantalums are electrolytics too.

>    Electrolytics are available in large capacitance values, but the
>    voltages generally are low.  They are also not very accurate (a typical
>    accuracy might be +50% -10%).  But they are good for power circuits and
>    general DC filtering.  Whenever possible, and when the circuit design
>    permits, I prefer tantalums over electrolytics.
		       ^^^^^^^^^ ^^^^ ^^^^^^^^^^^^^
> 
> 					Brett L Maraldo
> 	                    bmaraldo@watdcsu

Electrolytic capacitors have a dielectric formed by electrolytic action.

They provide the most farads per dollar, in the least volume of any type of
capacitor.  There main disadvantage is their inability to withstand reverse
voltages.  They are also poor performers at high frequency, high temperature,
and subject to internal heating in the presence of larger AC voltages.

Common types:
	Dry Aluminum
	Solid Tantalum
-- 

Brian Jones  aka  {ihnp4,allegra}!{drutx}!qwerty  @  AT&T-IS, Denver