Non inverting audio amplifier
The circuit utilizes two LM380 amplifiers, each capable of delivering a maximum output of 2.5W at 18V, enabling the system to provide several watts into an 8-ohm load. The first LM380 functions as a non-inverting amplifier, with the audio signal connected to the positive input.
In this configuration, the non-inverting amplifier ensures that the output signal maintains the same phase as the input signal, which is essential for audio fidelity. The bridge configuration allows for the doubling of output power by combining the outputs of the two LM380 amplifiers. This is particularly advantageous in applications requiring higher power levels without compromising audio quality.
The circuit typically includes additional components such as resistors and capacitors for biasing and stability. A feedback resistor is connected from the output to the inverting input of the first LM380, which helps control the gain of the amplifier. The gain can be adjusted by varying the feedback resistor values, allowing for customization based on specific audio requirements.
Power supply considerations are also crucial; the LM380 requires a regulated voltage supply, often in the range of 18V, to function optimally. Proper heat dissipation mechanisms, such as heat sinks, should be employed to manage the thermal output of the amplifiers, especially under heavy load conditions.
Overall, this non-inverting audio amplifier circuit is well-suited for a variety of audio applications, providing a reliable and efficient solution for amplifying audio signals while maintaining sound quality.Non inverting audio amplifier schematic. This Non-inverting audio amplifier circuit may be applied to Multi-channel audio systems, stereo phonographs, tape recorders and players, AM-FM radio receivers, servo amplifiers, Intercom systems, Automotive products. The Audio amplifier described here uses two small amplifiers like LM380 mounted in bridge. Two smallamplifiersLM380(2. 5Wmaxineach18V), which mountedbridgemode make it possible togetafew wattsinto 8ohms load. LM380 mounted on the first non-inverting amplifier, the audio signal connected to + input. The. 🔗 External reference
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