RF Subsystem Supports Variety Of Cellular Femtocells

A FULLY INTEGRATED RF SUBSYSTEM has been created for GSM, GPRS, and EDGE femtocell base stations and cellular repeaters. By combining analog and mixed-signal semiconductors on a compact assembly, the subsystem can be used in femtocell base station and cellular repeaters in the GSM850, EGSM900, DCS1800, and PCS1900 frequency bands. The dual-chip RF subsystem solution consists of the SKY74219-21 RF transceiver with analog in-phase/quadrature (I/Q) interface for quad-band GSM, GPRS, and EDGE applications and the SKY65330 transmit/receive front-end module (FEM). The transceiver incorporates a fractional-N frequency synthesizer with voltage-controlled oscillator (VCO) and crystal oscillator reference for tuning, a closed-polar-loop transmitter, and a direct-conversion receiver. The FEM includes two heterojunction-bipolartransistor (HBT) power-amplifier (PA) blocks and high-speed switching on an indium-gallium-phosphide (InGaP) die. P&A: $15.00 (each subsystem); 10,000 qty.

Skyworks Solutions, Inc., 20 Sylvan Rd., Woburn, MA 01801; (781) 376-3000; E-mail: [email protected]; Internet: www.skyworksinc

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