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A Class-A HeadClone? - Page 2

post #16 of 18
3/9/10 at 2:22am
moar cryo needed perhaps?
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post #17 of 18
3/9/10 at 1:30pm
Quote:
Originally Posted by Nemo de Monet View Post
Yeah, ya think? (Page two: Typical Single Supply Operation.)

Thanks, Captain Obvious.
Why calling it capitan obvious?

You need a negative supply, or coupling caps all over the place and a bias supply for the input. See page 2 of the datasheet.
Quote:
Nullstring: If the amplifier actually produced music, which it doesn't, for reasons I haven't quite worked out yet
The schematic posted above has the amps inputs & outputs setup for a dual (V+/V-) supply, but running off of a single supply.

On that note, why dont you take an opamp or amplifier chip, bias that into class A and slap a big buffer on the output PPA, M^3, Sheldon D Stokes, etc style? It is very easy to bias an opamp 3-5mA (or whatever similarly low current you think the opamp works best at) and then big power buffer.
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post #18 of 18
3/9/10 at 2:19pm
Quote:
Originally Posted by Nemo de Monet View Post
Yeah, ya think? (Page two: Typical Single Supply Operation.)
You're missing R2 + R3 from the single supply operation schematic. Haven't read the whole datasheet, but that looks like they set mid-rail bias.
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