This has been the first Mosfet power
amplifier of me, It is the most complete circuit. As a 60 watt power amplifier, this is sufficient for normal use in my home. The circuit may be outdated.
It has several advantages. Try read Then you will like it. The most important is the durability of the amplifier, and it directly. You do not want it to work halfway down. Because lose certainly stereo.
The signal from a tone control
circuit is entered to pass the RF filter circuits, that consisting of C3, R2 into base pin of the transistor Q1, which connected with Q2 as the Differential amplifier circuit, We use the transistor is a low noise model No-BC556 PNP type. The output from Q1,Q2 will be fed to the Differential amplifier circuit series second that consisting of the Q4,Q5 (2SC1775)
Circuit MOSFET Amplifier K134
using MOSFET has distortion very low, so the negative feedback circuit to the backwards signal is 45 dB. By be fed from the output pass to R8,R8,C4 come to the base pin of the Q8,Q9. The using low feedback as said will help to the distortion at low overload point.