手机的阻抗控制

PCB Layout Techniques to Achieve RF Immunity for Audio AmplifiersMaxim/Dallas > App Notes > AUDIO CIRCUITS Keywords: RF, Immunity, Susceptibility, RF Immunity, RF Susceptibility, MAX9750, Layout, Audio, Maxim

Oct 04, 2005

APPLICATION NOTE 3660

PCB Layout Techniques to Achieve RF Immunity for Audio Amplifiers
PCB layout techniques are discussed as a method to optimize the RF immunity performance of an audio amplifier IC. Maxim's MAX9750 IC is highlighted as a case study.

Introduction
RF immunity, or RF susceptibility, is quickly becoming as important a design consideration as PSRR, THD+N, and SNR in the audio world of cellular phones, MP3 players, and notebook computers. Bluetooth is proliferating as a wirelessserial-cable replacement for headsets and microphones in mobile applications. Wireless LAN (WLAN), using the IEEE 802.11b/g protocol, is pract