Feature-Rich, Complete Audio Record/Playback for GSM/GPRS Cell Phones
Short design cycles, coupled with PC-board area and cost pressures, continue to compel higher levels of integration in cell phone circuitry. Basic (low-tier) phone functionality is headed inexorably towards a one-chip solution. Meanwhile, in high- and mid-tier market segments in which model differentiation is critical, demand for high-performance, feature-rich peripheral components is increasingly important. This application note discusses how, given that market push and the continually evolving feature set, a complete analog and digital-audio solution optimized for GSM/GPRS cell phones would provide a solid core for ongoing designs. The optimized solution must also include voice-band audio functionality and flexible multimedia features. With that combination of features, the integration of both cell phone and application-based audio functions would be seamless.