D4100, D4101, D4102 series audio power amplifier circuit , suitable for portable radio, desktop radio, cassette recorder and recorder for audio power amplifier. These three circuits fully consider the use of different power supply voltage, when using 4 ohm field sounder, When the distortion is 10%, the output power is 1W, 1.5W and 2.1W. The D4100 is exactly the same as the D4101 chip layout, while the D4102 is only slightly different in the final stage bias circuit.
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