Monday, April 23, 2012

Powerful high quality amplifier

Nmos350 Mk2
This revised version yet to be built improves a few perfomance areas. I considered more complex ideas but this increased the component count and original idea of the amp would have been lost; that is a powerful high quality amplifier that used commonly available and cheap components.
  • A LED as the voltage reference for the first stage constant current source tracks changes in temperature slightly better that than the old double diode setup.
  • A cascode second stage makes it faster and more linear.
  • Better clipping attributes
  • The fuse has been shifted out of the voltage drive loop between the driver and output stages.

powerful high quality amplifier

Nmos350 Mk2 Schematic

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