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从板上的那颗RF2722芯片来看,是支持EDGE的。
$ Z0 x2 V8 E% b+ [: G/ _7 lThe RF2722 is a highly-integrated receiver IC supporting GSM, GPRS, and EDGE cellular standards in the
7 H# C" H0 r0 Z1 W( m$ d6 PGSM850, EGSM, DCS, and PCS bands. The RF2722 supports both very-low intermediate frequency (VLIF) as# D; @$ ~; I+ v, y, i
well as direct conversion receive (DCR) architectures, reducing external component count and eliminating the
+ D9 d: O4 l( D6 ^6 J6 _need for IF SAW and RF interstage filters without compromising performance. The IC includes: four LNA’s for
, }( L o2 \/ ?7 B5 V, Tmulti-band support; an integrated voltage controlled oscillator (VCO); automatic gain control (AGC); a quadrature
+ f, P+ u6 K; ^! S& odownconverting mixer; and, low and high band transmit buffers. Chip functionality, including IF AGC setting, is
* L8 c; O7 O0 U& I8 K, P8 _7 X T1 Icontrolled through a three-wire serial data interface (SDI). The RF2722 is part of the POLARISTM TOTAL RADIOTM
/ v# R( D+ a! I& x7 V. |0 Csolution.. W' r" m0 {! O# u; M+ M
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[ 本帖最后由 kgbkgb 于 2009-2-3 14:17 编辑 ] |
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