OTL Asylum

RE: (New?) OTL candidate scheme

150.148.0.27

In Reply to: RE: (New?) OTL candidate scheme posted by cellai@space.it on April 08, 2008 at 08:42:07

Without consulting any source material, that looks like a Futterman-type totem pole output stage. Because the output is attached to the plate of one phase and to the cathode of the other phase, there is likely to be some DC offset. This is why the classic Futterman design used coupling capacitors betw amp and spkr. Your amp might have a problem w/direct coupling. The input and driver stages look like cascaded dual-differential amplifiers. Will the output impedance of the driver stage be low enough (and the voltage swing great enough) to drive the output stage properly? Also, you've got coupling caps between each stage; it'd be nice to get rid of at least one pair.

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RE: (New?) OTL candidate scheme - cellai@space.it 23:57:51 04/10/08 (0)

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