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Single-chip Phone

Thu, 03/02/2006 - 7:06am

Silicon Laboratories introduces the Si4905 AeroFONE™ single-chip phone, a fully functional and completely integrated single-chip phone.


The AeroFONE solution offers software flexibility and high quality and performance. The Si4905 integrates all the functions necessary for a GSM/GPRS phone, including the analog and digital basebands, power management unit (PMU), battery interface and charging circuitry and RF transceiver in a monolithic CMOS IC. The Si4905 needs only a power amplifier, front-end switch, SAW filters and non-volatile memory to develop a complete GSM/GPRS handset, modem or data terminal. Silicon Laboratories’ approach to the single-chip phone offers a flexible and scalable platform for entry-level GSM/GPRS handsets.


Using the AeroFONE single-chip phone, only 58 components are necessary to build a complete quad-band handset. A complete handset can be realized in 6.1 cm2 of PCB. There are no "special" or expensive components required.


The AeroFONE single-chip phone is based on Silicon Laboratories’ Aero® II transceiver technology, which delivers desirable RF performance, resulting in increased call quality, and allows handset manufacturers to meet the stringent performance requirements of cellular network operators worldwide.


Silicon Laboratories’ layer one (L1) architecture enables handset developers to choose the software solution that is best for them. By respecting the handset manufacturer’s existing software infrastructure, Silicon Laboratories reduces the cost of switching to a new platform and mitigates risk in the product development cycle. Handset developers can reuse their existing software infrastructure or migrate to one of the other solutions that Silicon Laboratories has validated with its software partners including TTPCom, Stackcom and CCww.


The Si4905 integrates the PMU and the battery interface and charging circuitry, all in a single monolithic IC. The Si4905 integrates both of these high-voltage subsystems in a 0.13 mm standard CMOS. The AeroFONE single-chip phone also integrates 2 Mb of on-chip SRAM, which enables customers to build GSM voice-centric platforms without the need for external SRAM.


The PMU accepts power from the battery and regulates the voltage to the blocks on chip. Handset subsystems that require power include the microcontroller unit (MCU) and digital signal processor (DSP). The Si4905 PMU supplies power to other key subsystems, including the audio, RF and input/output, and also integrates a regulator for external memories and external GPIO peripherals. All programming required to control the external chips is verified on-chip and delivered as a complete solution.


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