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从板上的那颗RF2722芯片来看,是支持EDGE的。
4 f/ T7 o, s/ H0 w& V YThe RF2722 is a highly-integrated receiver IC supporting GSM, GPRS, and EDGE cellular standards in the) r5 M* O; J& x$ N, t3 U
GSM850, EGSM, DCS, and PCS bands. The RF2722 supports both very-low intermediate frequency (VLIF) as; r/ Y, F* a. M3 d f7 x( j
well as direct conversion receive (DCR) architectures, reducing external component count and eliminating the
+ c! I& X7 ]( ]8 o, R/ i5 v5 ineed for IF SAW and RF interstage filters without compromising performance. The IC includes: four LNA’s for* L, Q4 v }8 e2 j
multi-band support; an integrated voltage controlled oscillator (VCO); automatic gain control (AGC); a quadrature
! m9 `4 _% ^0 | sdownconverting mixer; and, low and high band transmit buffers. Chip functionality, including IF AGC setting, is
; X, Q" p+ n( R- l/ Rcontrolled through a three-wire serial data interface (SDI). The RF2722 is part of the POLARISTM TOTAL RADIOTM
; \) ?; d1 E) t5 u3 {% Rsolution.
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' Q' \/ j5 Q5 h9 D4 ?+ ?[ 本帖最后由 kgbkgb 于 2009-2-3 14:17 编辑 ] |
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