Dynamically biased high-fidelity power amplifier circuit (a)

It is a dynamically biased DC power amplifier
circuit driven by r.ePC1225H. The difference from the previous circuit is that the feedback capacitor is canceled and replaced by a DC servo circuit. Second, it changes the
adjustable bias circuit to super Class A dynamic bias, further improving the performance of the circuit.
    The bias circuit is a substantial improvement of this amplifier circuit, using Class A super dynamic bias instead of the adjustable bias
circuit recommended by the manufacturer. Pins 7 and 8 of tjlPC1225H are bias terminals. The manufacturer recommends an ordinary adjustable bias circuit, which is internally
connected to the collector of the voltage driving amplifier stage and the base of the power amplifier output stage, so we can use pins 7 and 8. The terminal is connected to a super Class
A bias circuit , making the power amplifier circuit a super Class A power amplifier circuit .