Lowest noise per volt, Nimh comes in second. See Hoffmann "Noise Measurements of Chemical Batteries"
Last edited:
Did you have a low inductance load right on the output of the capacitor multiplier? If not you should add a capacitor with a little bit of ESR but low inductance real close to it.
Please, always snub a cap multiplier.
Any inductance after a regulator or cap-multiplier is like putting on dirty underwear after a refreshing morning shower.
another reason to have Horowitz & Hill, The Art of Electronics V3 on your bookshelf!
A good standard troubleshooting method is to record the voltage at each transistor/chip pin, then it should be easy to tell if something is wrong. You can do the same with AC readings to see where the signal stops or noise begins.
This time I have luck. The circuit in post 11082 worked right away.
The only difference is that I use a conventional plus-minus supply.
That has a disadvantage. Input and output offset has to be trimmed.
I simply made the two supply voltages as similar as a could with a simple trimmer.
There is is a bit of hum. That partly comes from the mains transformer that is in board and partly from the PSSR that is not that great.
I have a solution for this that I will try now.
The only difference is that I use a conventional plus-minus supply.
That has a disadvantage. Input and output offset has to be trimmed.
I simply made the two supply voltages as similar as a could with a simple trimmer.
There is is a bit of hum. That partly comes from the mains transformer that is in board and partly from the PSSR that is not that great.
I have a solution for this that I will try now.
Attachments
Very low Vcesat.... that means low Rcesat... very good
Do you know if they make a dual NPN/NPN and dual PNP/PNP version ?