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 become increasingly important. 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 (microphone, receiver speaker amplifier, ADC, and DAC) and flexible multimedia features (high-resolution ADC and DAC, voice recording, stereo microphones, headphones, and 8 speaker amplifiers). With that combination of features, the integration of both cell phone and application-based audio functions would be seamless.