Analog Devices claims to have squeezed the radio front-end of GSM/GPRS mobile phones into a device measuring as little as 1.5 sq. cm.

Called Othello-G, it supports full quad-band operation and integrates design elements such as voltage-controlled oscillators (VCOs) and the associated tank circuits, PLL loop filters, and power management.

It features four fully integrated programmable gain differential LNAs (low-noise amplifiers) for full quad-band (GSM850/900/1800/1900) support. Othello-G uses a single integrated LO (local oscillator) VCO (voltage control oscillator) for both receive and transmit circuits.

The synthesiser lock times are optimised for GPRS applications up to and including class 12. Another components saving feature is a frequency synthesiser which integrates a loop filter and incorporates a complete reference crystal calibration system.

www.analog.com 

Tel: 01932 266000