Discrete OPAMP

[audio-gd]

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]

This is OPA-Sun

[audio-gd]

The photos of OPA-Earth

[audio-gd]

The photos of OPA-Sun

[audio-gd]

OPA Exterior

[alant4321]

Dear Mr. Ho,

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


B. regards,
alant

[audio-gd]

Extension lead of the OPA, then I can install it in my gear very easy.

[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.

Regards,
Rüdiger

[AndrewT]

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

Should this be in the traders sections?

[forr]

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.