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Old 1st August 2008, 12:19 PM   #1
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Default Discrete OPAMP

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,
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Old 1st August 2008, 12:22 PM   #2
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This is OPA-Sun
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Old 1st August 2008, 12:23 PM   #3
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The photos of OPA-Earth
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Old 1st August 2008, 12:25 PM   #4
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The photos of OPA-Sun
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Old 1st August 2008, 12:27 PM   #5
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OPA Exterior
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Old 1st August 2008, 01:44 PM   #6
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Dear Mr. Ho,

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


B. regards,
alant
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Old 3rd August 2008, 06:43 AM   #7
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Extension lead of the OPA, then I can install it in my gear very easy.
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Old 3rd August 2008, 08:02 AM   #8
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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
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Old 3rd August 2008, 09:40 AM   #9
AndrewT is offline AndrewT  Scotland
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is audio-gd the same person as the vendor in the WWW link?

Should this be in the traders sections?
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Old 6th August 2008, 01:12 PM   #10
forr is offline forr  France
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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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