Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!decvax!mcnc!gatech!bloom-beacon!mit-eddie!genrad!rep
From: rep@genrad.UUCP (Pete Peterson)
Newsgroups: sci.electronics
Subject: Re: VCO waveform generators
Message-ID: <2547@genrad.UUCP>
Date: 29 Feb 88 12:40:32 GMT
References: <18403@topaz.rutgers.edu>
Reply-To: rep@genrad.UUCP (Pete Peterson)
Organization: GenRad, Inc., Concord, Mass.
Lines: 23

In article <18403@topaz.rutgers.edu> awalker@topaz.rutgers.edu (*Hobbit*) writes:
  >All the references I can conveniently get my hands on at the moment seem to be
  >from '78 or so, sadly out of date.  Are there any VCO chips that do square/
  >triangle/whatever outputs that require a minimum of external parts?  Cheap?
  >I want to build a project with a whole pile of [probably triangle] oscillators
  >modulating each other.
  >
There may be newer, better, fancier parts available, but the 8038
Waveform-generator/VCO has been around for a long time, is made by EXAR,
Intersil, and probably others.  It can be swept over something like a 30:1
frequency range, and will go from something like a milliherz (!) to about
300 khz.  It puts out square-waves and triangle-waves and uses a nonlinear
network to convert the triangle waves to fairly reasonable sine waves.  It
wants a 10-30 volt supply (or +/-5 to +/-15).  It is listed with a price of
$2.79 in my 1987 Active Electronics Catalog (a good place to buy random
parts for home projects).

I have used these theings and they are easy to make work and use a minimum
of external components.

	pete peterson
	{decvax,linus,wjh12,mit-eddie,masscomp}!genrad!rep