100W power amplifier circuit composed of STK0100

Looking at the low power amplifier circuit composed of ST K0100 in conjunction
with Figure 2-95, we will find that ST K0100
is used as the output stage of this OCL power amplifier circuit.
VTi ~ VTs form the differential input stage of this circuit. VTi is
the constant current source, and VT4 and VTs are the mirror constant current source load. The input stage
is a typical high-gain balanced prestage. AC gain VG=
R"/Rd=56/1=560
    Vr7 is the driving stage of the output stage, and VT6 is the constant current source
load of this stage.
    For this circuit For the pre-stage, the components should be selected according to the selection and pairing method of the differential input stage components
of the discrete component OCL power amplifier circuit . They should be strictly selected and carefully paired, otherwise it will easily cause midpoint DC potential imbalance.