Pantech PG-1210 Service Manual

Also see for PG-1210: User manual

Pantech PG-1210 Service Manual Manual pdf 13 page image

PG-1210 Service Manual4.2 Radio Transceiver SectionFig.4-1. RF Transceiver block diagramThe PG-1210’s RF Transceiver, which is Aero II, is the industry's most integrated RF front end formulti-band GSM/GPRS digital cellular handsets and wireless data modems. The high-level ofintegration obtained through patented and proven design architectures, fine line CMOS processtechnology, and high-performance quad flat no-lead (QFN) technology results in a transceiversolution with industry-leading performance, the smallest form factor, the fewest number ofcomponents, the smallest solution footprint, and the lowest bill of materials (BOM) in the industry. Aquad-band RF front end using the Aero II transceiver can be implemented with 19 components in lessthan 1 cm2 of board area. This level of integration is an enabling force in lowering the cost, simplifyingthe design and manufacturing, and shrinking the form factor in next-generation GSM/GPRS voice anddata terminals. The receive section uses a digital low-IF architecture that avoids the difficultiesassociated with direct conversion while delivering higher performance, lower solution cost, andreduced complexity. The baseband interface is compatible with any supplier's baseband The transmitsection is a complete up-conversion path from the baseband subsystem to the power amplifier, anduses an offset phase-locked loop (OPLL) with a The frequency synthesizer uses Silicon Laboratories'proven technology that includes an integrated RF VCO, loop filter, and varactor. The unique integer-NPLL architecture produces a transient response superior in speed to fractional-N architectureswithout suffering the high phase noise or spurious modulation effects often associated with thosedesigns. This fast transient response makes the Aero II transceiver well suited to GPRS multi-slotapplications where channel switching The analog baseband interface is used with conventional GSMbaseband ICs (BBIC). The receive and transmit baseband I/Q pins are multiplexed together in a4-wire interface. A standard three-wire serial interface is used to control the transceiver.12PANTECH