AmplifierCircuits

Overview: Audio Power Amplifier with Built-in AGC AN12972A   Increasing volume settings when using small speakers   results in distortion as the output signal distorts at high   gain settings. The AN12972A audio power amplifier   features built-in automatic gain control (AGC) circuitry  to minimize distortion by decreasing too high an input  gain level. Using a low-noise amp minimizes noise even   when the speaker is placed close to an ear. Features: Built-in AGC circuitry if an input level is too high, the  AGC is activated to minimize distortion, raising the   overall volume level and reducing noise. Low noise amplifier. Input circuit format accommodates different input  signals (mixing possible) Standby and speaker mute functions. Small package. Cellular phones, PDAs and other mobile equipment Circuit Diagram: Audio Power Amplifier with Built-in AGC AN12972A 

Overview: Audio Power Amplifier with Built-in AGC AN12972A   Increasing volume settings when using small speakers   results in distortion as the output signal distorts at high   gain settings. The AN12972A audio power amplifier   features built-in automatic gain control (AGC) circuitry   to minimize distortion by decreasing too high an input   gain level. Using a low-noise amp minimizes noise even   when the speaker is placed close to an ear. Features: Built-in AGC circuitry if an input level is too high, the   AGC is activated to minimize distortion, raising the   overall volume level and reducing noise. Low noise amplifier. Input circuit format accommodates different input  signals (mixing possible) Standby and speaker mute functions. Small package. Cellular phones, PDAs and other mobile equipment Circuit Diagram: Audio Power Amplifier with Built-in AGC AN12972A