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Linear Edge power amps enable longer talk-time

Posted: 16 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:linear power amplifier? quad-band power amplifier? longer talk-time handset?

Anadigic's quad-band linear Edge power amp

Anadigics Inc. unrolls AWT6172, a new quad-band linear Edge power amplifier module for 2.75G and 3G cellphones, PDAs and wireless PC cards that use GSM/Edge cellular standards. AWT6172 supports operation in the GSM850, GSM900, DCS and PCS bands, said the company.

The Edge standard has been adopted by most GSM operators either in combination with UMTS W-CMDA (3G) or as a stand-alone upgrade (2.75G) to the GSM/GRPS (2.5G) system. At present, the two predominant hardware architectures adopted by baseband chipset suppliers serving the Edge market are polar and linear systems.

"With the introduction of AWT6172 Linear Edge power amplifier, Anadigics extends its reach beyond Polar Edge and Wedge markets," said Ali Khatibzadeh, senior VP and general manager of wireless products at Anadigics. "It will also enable us to participate in the other segment of 3G market served by chipset suppliers using the linear Edge architecture."

AWT6172 delivers efficiencies of up to 55 percent in GMSK mode for longer talk-time, with a linearity of 64dBc ACPR at 28.5dBm output power level.

Featured in a small 6-by-6-by-1.1mm package, the power amplifier module is built on InGaP-Plus HBT technology and is EGPRS capable (class 12). Saturated output power in GMSK mode is rated at 35dBm in the GSM850/900 bands, and at 33dBm in the DCS/PCS bands. Efficiencies for these two bands are 55 percent and 50 percent, respectively. Comparable numbers for Edge linear power are 28.5dBm and 27.5dBm for GSM850/900 and DCS bands respectively.




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