Darlington VAS stage with optimized C dominant pole?

Daveis · 27th April 2009, 01:53 AM

Emotiva is saying this of their flagship mono block amp.

Is this a good thing?

ostripper · 27th April 2009, 02:21 AM

Marketing hype... that describes the most typical amplifier topology. Sounds good to a layman , to part him and his $$$'s.

CBS240 · 27th April 2009, 02:38 AM

There is a big difference between a Darlington VAS and a Buffered VAS. The difference is that in the Buffered VAS, the collector of the first (driver) transistor is connected to GND instead of to the collector of the VAS transistor (VAS out). This makes an enormous difference in stability and thus bandwidth, wrt C-dom. Marketing hype, perhaps. Technically mis-labeled circuit description, probably.

Don't have a schematic do ya?

27th April 2009, 01:53 AM	#1
Daveis diyAudio Member Join Date: Dec 2003 Location: Des Moines, IA	Darlington VAS stage with optimized C dominant pole? Emotiva is saying this of their flagship mono block amp. Is this a good thing?

27th April 2009, 02:38 AM	#3
CBS240 diyAudio Member Join Date: Aug 2005 Location: K-town	There is a big difference between a Darlington VAS and a Buffered VAS. The difference is that in the Buffered VAS, the collector of the first (driver) transistor is connected to GND instead of to the collector of the VAS transistor (VAS out). This makes an enormous difference in stability and thus bandwidth, wrt C-dom. Marketing hype, perhaps. Technically mis-labeled circuit description, probably. Don't have a schematic do ya? __________________ All the trouble I've ever been in started out as fun......

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27th April 2009, 02:21 AM	#2
ostripper diyAudio Member Join Date: May 2008 Location: Albany , NY (smallbany)	Marketing hype... that describes the most typical amplifier topology. Sounds good to a layman , to part him and his $$$'s.

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