Optimize the RF immunity performance of an audio amplifier RF immunity, or RF susceptibility, has become a crucial design consideration in the audio components of devices like cellular phones, MP3 players, and laptops. With the proliferation of wireless technologies such as Bluetooth, WLAN (IEEE 802.11b/g), and TDMA-based systems (GSM, PCS, DECT), electronic circuits are increasingly susceptible to RF interference. This is particularly critical for audio amplifiers, which can demodulate RF signals, causing unwanted audible noise in speakers. To mitigate this issue, designers must carefully optimize the RF immunity of audio amplifiers, considering both the amplifier IC and PCB layout at the board level.
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