BA5417 Stereo Power Amplifier

Setup and dealing of this stereo power amplifier circuit is somewhat similar to the BA5406 based mostly stereo amplifier circuit revealed previously. C10 and C11 are DC decoupling capacitors that block any DC level present in the input signals. C2 and C6 couples the amplifiers left and right power outputs to the corresponding loud speakers. C1 and C5 are bootstrap capacitors.

Bootstrapping is a technique during which a portion of the amplifiers is taken and applied to the input. The prime objective of bootstrapping is to boost the input impedance. Networks R1,C3 and R2,C7 are meant for improving the high frequency stability of the circuit. C4 is the power supply filter capacitor. S1 is the standby switch. C8 is a filter capacitor. R3 and R4 sets the gain of the left and right channels of the amplifier in conjunction with the 39K internal feedback resistors.