![]() Winding to the bases are attached so as to implement positive feedback. Power transistors are driven from across the current excitation transformer TR2. ![]() Parallel-connected components composed of R11 and C8 partially compensates for the the inductive character of the load. Class D Amplifier Power Supply TL494 SMPS Circuit Diodes D3 and D4 are doing swells from the power of the transformer (ETD49) back to the filter. ![]() Capacitor C5 are used to separate any dc components that arises from varying the switching of transistors. Resistors R1 and R2 balance the leakage currents of the capacitors and thus help to keep an artificial center in the middle of the power supply voltage. On the other side of the halfbridge output are power switching transistors MJE13009. This place is connected to power transformer TR1.
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