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从板上的那颗RF2722芯片来看,是支持EDGE的。
0 N/ W% _- s3 E) {$ D! qThe RF2722 is a highly-integrated receiver IC supporting GSM, GPRS, and EDGE cellular standards in the
`) r O% N. o* OGSM850, EGSM, DCS, and PCS bands. The RF2722 supports both very-low intermediate frequency (VLIF) as
& Y, G; c6 B) V) G; I8 S5 ~5 lwell as direct conversion receive (DCR) architectures, reducing external component count and eliminating the0 }7 Z- o, b7 I; M
need for IF SAW and RF interstage filters without compromising performance. The IC includes: four LNA’s for
) l$ y+ `* g) @ \' i4 v7 Rmulti-band support; an integrated voltage controlled oscillator (VCO); automatic gain control (AGC); a quadrature5 z- }7 m- Z x4 K; V
downconverting mixer; and, low and high band transmit buffers. Chip functionality, including IF AGC setting, is
, R' E5 Y' d. |% V9 }( v& @controlled through a three-wire serial data interface (SDI). The RF2722 is part of the POLARISTM TOTAL RADIOTM9 d8 }, T$ b1 r
solution.
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[ 本帖最后由 kgbkgb 于 2009-2-3 14:17 编辑 ] |
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