David Kosman
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The Weiss 0-1 needs a +- supply.
Frank
Yes, but then it barely works because either its inputs or its output will have the minimum amount of voltage swing.- if the lowest voltage for op-amp is 5V, does it mean 2,5V for positive and 2,5V for negative?
25dB is a change in voltage of about 18 times which is not much change since we can hear a change of at least 60dB (1000 times). We do not know how much signal the headphones amp needs to be loud enough.- What would be the best solution for my circuits? Because the difference in frequencies will be up to like 25 db, would the output swing be too low for it? (I have a headphone amplifier in some case)
No, its inventor and manufacturer says its MINIMUM power supply is 7V or plus and minus 3.5V when it BARELY works.- my opamp is then usuable with USB? I don't know where did I find that the lowest for it is 5 volts.
It is on its datasheet (ICL7660) but many people say it causes noise if used to power an audio circuit.- do you have some example of that module for generating the negative supply?
(ICL7660) but many people say it causes noise if used to power an audio circuit.
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