Audio Power Amplifier Solutions for New Wireless Phones
Michael Score, Donald Dapkus · 2000
Wireless phones continue to gain additional features, making them more valuable to the end user. Many of these features involve increased audio functionality, and hence, some additional design effort on the audio portion of the phone. This paper gives an overview of audio amplifiers before describing different audio architectures that can be used to implement features like ear-bud speakers, stereo headphone drive, hands-free mode, and other emerging needs. Some common audio pitfalls and their solutions are presented. The paper