oscarhuang
Well-known member
- Joined
- May 22, 2020
- Messages
- 159
This is a picture of my Alice OPA. I removed the zener diode. The noise is reduced a lot. Previously I found the noise level to be too high and unusable, but after removing D1 the noise decreased. But what I prefer is Mr. Rogs' OPA1641 circuit. I set the polarization voltage to around 60V. Very, very quiet, thank you Rogs for your selfless sharing.@oscarhuang : can you share the exact schematic of your circuit? In the original OPA Alice circuit, there are two elcaps that would effectively eliminate zener noise. The ones encircled in the picture.
Jan
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