Published:2013/3/29 4:27:00 Author:Ecco | Keyword: Audio Power Amplifier, AM Radio | From:SeekIC
This is an AM radio power amplifier circuit. What is different with other general amplifier is that this circuit has a low-pass filter (passive type), built using R1C1 to limit the input-output frequency response. Additionally, a ferroxcube K5-001-001/3B with 3 turns of wire is used as ferrite bead at output filter. All components should be spaced very close to the IC. The ground and speaker lead must be twisted tightly. The supply lead and supply ground also must be twisted very tightly. Here is the schematic diagram of the circuit:
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