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audio-gd 1st August 2008 01:19 PM

Discrete OPAMP
 
2 Attachment(s)
Recently I have built two type discrete OPAMP, they are upgrade of my old discrete OPAMP,
One name call "Earth", it sound is natural,
Other name call "Sun", it will more clear and dynamic,

audio-gd 1st August 2008 01:22 PM

2 Attachment(s)
This is OPA-Sun

audio-gd 1st August 2008 01:23 PM

2 Attachment(s)
The photos of OPA-Earth

audio-gd 1st August 2008 01:25 PM

2 Attachment(s)
The photos of OPA-Sun

audio-gd 1st August 2008 01:27 PM

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OPA Exterior

alant4321 1st August 2008 02:44 PM

Dear Mr. Ho,

Congratulation! Two more good stuffs at http://www.audio-gd.com/enweb/pro/diy/OPA.htm .


B. regards,
alant

audio-gd 3rd August 2008 07:43 AM

2 Attachment(s)
Extension lead of the OPA, then I can install it in my gear very easy.

Onvinyl 3rd August 2008 09:02 AM

Hi audio-gd,

what benefits do you see in cascoding your output stage? At least in my simulation the performance was *worse* (more THD) than without cascode.

Regards,
Rüdiger

AndrewT 3rd August 2008 10:40 AM

is audio-gd the same person as the vendor in the WWW link?

Should this be in the traders sections?

forr 6th August 2008 02:12 PM

Quote:

Originally posted by Onvinyl
Hi audio-gd,

what benefits do you see in cascoding your output stage? At least in my simulation the performance was *worse* (more THD) than without cascode.


Hi Rüdiger,
This is not really a cascode, as the base is referenced to half the voltage between the output and the power supply, and not clamped to the output as it should be.


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