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The '''CEM3340''' is a self contained [[VCO]], originally produced by [[OnChip Systems|Curtis Electromusic Specialties]]. With both [[exponential]] and [[linear]] control inputs and up to four output waveforms: [[triangle]], [[sawtooth]], [[square]], and [[pulse]] with voltage controllable [[pulse width]]. It has full temperature compensation making it extremely stable. Also included is provision for [[oscillator sync|hard and soft synchronization]] of the [[frequency]], and an output for easy adjustment of [[VCO high frequency tracking|high frequency tracking]].<ref name="3340ds">[http://www.sdiy.info/wiki/File:CEM3340_datasheet.pdf CEM3340 data sheet]</ref>
 
In 2016 after twenty or more years of diminishing availabilty, in response to [[Coolaudio International LimitedLtd.|Coolaudio's]] [http://www.coolaudio.com/features-page.php?product=V3340D V3340] re-design of the part to the same specifications, OnChip Systems remanufactured the 3340.<ref>[https://www.facebook.com/curtischips/posts/1173548609342828 Curtis Electromusic Specialties], Facebook, 5 June 2016</ref><ref>[https://ask.audio/articles/curtis-family-speaks-out-against-behringer-synth-clone-plans-using-cem3340 Curtis Family Speaks Out Against Behringer Synth Clone Plans Using CEM3340] by Rounik Sethi, Ask.Audio, 21 Mar 2017</ref><ref>[http://synth-diy.org/pipermail/synth-diy/2017-September/166135.html CEM3320/V3320], SDIY list, Sep 2017</ref>
 
== Usage ==
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