LG KG270 Service Manual - Page 14
Overview of E-GOLDvoice - mobile phone
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3. TECHNICAL BRIEF 3.1.1 Overview of E-GOLDvoice The E-GOLDvoice is a GSM baseband modem including RF transceiver covering the low bands GSM850 /GSM900 and high bands GSM1800 / GSM1900 bands. E-GOLDvoice is Dual Band, therefore, it supports by default a low / high pair of bands at the same time: 1. GSM850 / GSM1800 2. GSM850 / GSM1900 3. GSM900 / GSM1800 4. GSM900 / GSM1900 The E-GOLDvoice is optimized for voice-centric Mobile Phone applications. The E-GOLDvoice is designed as a single chip solution that integrates the digital, mixed-signal, RF functionality and a direct-to-battery Power Management Unit. The transceiver consists of: • Constant gain direct conversion receiver with an analog I/Q baseband interface • Fully integrated Sigma/Delta-synthesizer capability • Fully integrated two-band RF oscillator • Two-band digital GMSK modulator with digital TX interface • Digitally controlled crystal oscillator generating system clocks. The E-GOLDvoice supports a direct battery connection, hence eliminating the need for an external Power Management Unit. The E-GOLDvoice has different power down modes and an integrated power up sequencer. The E-GOLDvoice is powered by the C166®S MCU and TEAKLite® DSP cores. The operating temperature range from -40C to 85C. It is manufactured using the 0.13 •Ïm CMOS process. - 15 -