Pars Posted July 24, 2009 Report Share Posted July 24, 2009 The mosfet power is not symetrical, V- is ground. Am I wrong about this ? Last project I did was stupidly populating a printed PCB (dynalo). I learnt lots about how the amp works but nothing about layout. V- in the case of the M3 (and many other virtual ground amplifiers) depends upon your perspective, but is actually the - of the single ended power supply. It functions on this schematic as the - rail, (or V-). Ground reference is generated by a TLE2426 and is 1/2 the potential of V+ and V-. So for example if you are using a 24Vdc power supply, if you measure V- in relation to the - lead of the PSU, you would get 0V. However, if you measure it in relation to the virtual ground (SG on the schematic), you will see -12Vdc for V- (and +12Vdc for V+). Quote Link to comment Share on other sites More sharing options...
Bidoux Posted July 24, 2009 Report Share Posted July 24, 2009 I think I got it. Thanks everyone it was really kind to answer me. Quote Link to comment Share on other sites More sharing options...
Looser101 Posted July 24, 2009 Report Share Posted July 24, 2009 I think you need to understand how virtual grounds work. It will make your life easier. Virtual Ground Circuits Quote Link to comment Share on other sites More sharing options...
Bidoux Posted July 24, 2009 Report Share Posted July 24, 2009 I knew the TLE2426 was acting as a ray splitter but I didn't totally understood the first power supply. I do know. Quote Link to comment Share on other sites More sharing options...
MASantos Posted July 26, 2009 Report Share Posted July 26, 2009 This is a question that just crossed my mind: Would there be any advantage in powering an M3 with a o22 bypassing the railsplitter instead of just using a o11? Quote Link to comment Share on other sites More sharing options...
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