LM4904 audio input differential amplifier circuit
The LM4904 is a low-power audio input differential amplifier designed for high-performance audio applications. This circuit configuration is ideal for amplifying audio signals while rejecting common-mode noise, which is particularly important in environments with electromagnetic interference.
In this circuit, the audio input is connected to the +IN and -IN terminals of the LM4904. The differential input allows the amplifier to process the audio signal effectively by comparing the voltage levels at these two terminals. The output of the amplifier is a single-ended signal that represents the difference between the two input signals, amplified by the gain set by external resistors.
The circuit typically includes additional components such as capacitors for filtering and stability, as well as resistors to set the gain of the amplifier. The gain can be adjusted based on the application requirements, allowing for versatility in different audio systems. Power supply decoupling capacitors are also recommended to ensure stable operation and minimize noise.
Overall, the LM4904 differential amplifier circuit is a robust solution for audio input applications, enhancing signal integrity and providing high-quality audio output. Proper layout and component selection are crucial for achieving optimal performance in real-world implementations.Shown for the LM4904 audio input differential amplifier circuit. The audio signal in the form of a differential input to the terminal + IN and -IN terminals.
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