Doepfer

Thomas,
 
The best description I read was by Jurgen Haible who reversed engineered
the Wasp VCF. Have a look at the following link.
 
http://www.oldcrows.net/~jhaible/tonline_stuff/hj_wasp.html
 
regards
 
David
 
 

David Salter 
Reuters Ltd 
UKI Project Management 
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	-----Original Message-----
	From: thomasborax [mailto:thomasborax@yahoo.com] 
	Sent: 28 June 2004 19:51
	To: Doepfer_a100@yahoogroups.com
	Subject: [Spam] [Doepfer_a100] wasp ques
	
	
	hi
	i just bought a wasp filter module.  it sounds very cool.
	i am curious if anyone could explain to the principle it
operates 
	upon?  i dont fully understand how electronics work.  i
understand 
	that op amps are basic circuits that are in many electronics.  i
see 
	a lot of op amp ICs when i go to a local store that sells
electronic 
	parts.
	
	how does this circuit use "digital inverters" as analog op amps,
and 
	why won't it self oscillate?  the res all the way up does create
a 
	very grotesque and fantastic sound.  my understanding of filters
is 
	that the resonance is feeding the filter back into it self, thus

	oscillating at the tuned frequency (cutoff).
	
	anyone who can answer in a simplified way, thanks.
	---t
	
	
	
	
	
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