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Articles tagged with: Power Amplifiers and Analog
The Birth of a Mobile-Handset Powerhouse
Epcos's recent acquisition of NXP Semiconductor's Radio-Frequency Microelectromechanical Systems (RF MEMS) business establishes the company as the leader in a technology that promises to expand the capabilities and cut the costs and power consumption of mobile handsets, according to iSuppli. more
Related Tags: wi-fi, semiconductor, isuppli, nxp, battery, switches, mems, chipset, Germany
Single-Chip CMOS HSDPA / WEDGE RF Transceiver for 3G Handsets
Sirific Wireless has introduced the mobile industry's first single-chip CMOS HSDPA / W-EDGE RF transceiver. The SW3200 RF transceiver supports transmit and receive operation in five WCDMA bands (I, II, III, IV and V), as well as all four EDGE, GPRS, and GSM bands. With HSDPA Category 9 capability, the SW3200 enables downlink data rates up to 10.2 Mbps. It also incorporates a patented sigma-delta fractional-N synthesizer design that requires no external loop filter components. An on-chip 26-MHz digitally controlled crystal oscillator (DCXO) completes the SW3200's extensive feature list. more
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Analog Devices has extended its VersaCOMM family of digital up- and down-converters. Among the new products is the AD6633, a digital up-converter featuring breakthrough technology that significantly reduces output power requirements for 3G wireless base station power amplifiers (PA). The AD6633's innovative VersaCREST crest reduction engine enables optimum baseband-to-IF (intermediate frequency) signal conversion by anticipating and reducing power peaks earlier in the signal chain. Traditionally, base station manufacturers have relied on expensive, highly linear power amplifiers to avoid output signal distortion caused by large peaking signals. Analog Devices' new solution reduces peak-to-average power by up to 6 dB, the equivalent of replacing a 40 W amplifier with a 10 W amplifier. This means that manufacturers can either reduce their power amplifier expense while achieving dramatic power savings of up to 75 percent, or, using the existing 40 W PA, an operator can support up to four times the coverage area. more
Related Tags: td-scdma