On Wed, 20 Feb 2002 15:38:35 -0600 Nick Veys writes: > Like page 2 of this document? > http://mayaweb.upr.clu.edu/~mtoledo/newpages2/ElectronicsII_files/Docs/H > andouts/oscillators.pdf > > That seems to be the simplest W-Bridge I've found, and just what you > described except with the feedback on the inverting input... > Actually, it's just what I described. R1 and R2 set the gain of the noninverting amp to 3. The "gain" of the series/parallel RC network is 1/3, so the amplifier gain makes up for this and it oscillates. I gave the analysis of the RC network to my students a while back as an exercise, but do not now find it in my class notes. (http://www.hallikainen.org/cuesta/) Harold FCC Rules Online at http://hallikainen.com/FccRules Lighting control for theatre and television at http://www.dovesystems.com ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads