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23rd April 2012, 06:57 PM
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diyAudio Member
Join Date: Dec 2009
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Decoupling supply
Hi to all
 Connect more amplifier stages sometimes may only work on s.p.i.c.e.  but in reality feedback of power rails (above all class B) creates only a power oscillator.  Normally it use these solutions for decoupling supply of Voltage Amplifier Stage : * Bootstrap capacitor * Costant Current Source * R-C filter * R-C-Zener * Separate supply * others Some examples : I need comments about "100W power amp. elektor april 1982" C5 = 220u 40V as bootstrap capacitor that decouples supply for T4 (BC639) Also differential amplifier decoupled with zener. DIY Audio Power Amplifier modules : DIY Audio (to see schematics )Decoupling CCS with T3 & T6 also decoupled with RC filter advantages and disadvantages of these solutions ? how they sound ? 
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