Power Amplifier Mini 2W+2W by TBA820M

The circuit is designed to amplify telephone signals using a 2W+2W amplifier with an 8-ohm loudspeaker. It provides adequate sound output while maintaining good audio quality. The primary component of this telephone amplifier circuit is the IC LF351, which enhances the telephone signal from the pickup before transmitting it to the IC TBA820M for further amplification to the loudspeaker. Additionally, the circuit features a variable resistor (VR1) that allows for fine adjustment of the sound level, enabling users to control the volume from loud to silent.

This telephone amplifier circuit is structured to improve the audio output of telephone signals significantly. It begins with the initial signal pickup, where the LF351 operational amplifier plays a crucial role in boosting the weak telephone signal. The LF351 is known for its low noise and high bandwidth characteristics, making it suitable for audio applications.

Once the signal is amplified by the LF351, it is then fed into the TBA820M, which is a dedicated audio amplifier IC capable of delivering up to 2W of output power into an 8-ohm load. This stage of amplification ensures that the audio signal is strong enough to drive the loudspeaker effectively, providing clear and loud sound reproduction.

The circuit includes a variable resistor (VR1) that serves as a volume control. By adjusting VR1, users can modify the gain of the amplifier circuit, allowing for personalized sound levels according to the user's preference. This feature is particularly beneficial in environments where background noise may vary, enabling the user to maintain optimal audio clarity.

Overall, this telephone amplifier circuit is designed for simplicity and effectiveness, making it an excellent choice for enhancing telephone audio signals in various applications. The combination of the LF351 and TBA820M ICs ensures reliable performance, while the inclusion of adjustable volume control adds versatility to the design.The sound will a little 2W+2W just but enough with 6 sizes are inch 8ohm loudspeakers. as a result still have a voice good loud the moderately. Request friends have fun the circuit amplifies this miniature please yes. If phone your light exceedingly ring. Invite come to this way. I thinks this circuit can help. It is Telephone Amplifier circuit. By have pillar equipment be IC LF351 perform enlarge telephone signal from pick up give the power goes up. Before transmit to IC TBA820M for amplify with a loudspeaker next sir. And VR1 perform fine the loud sound or the silent 🔗 External reference