User's Manual

VS500 USER MANUAL
Confidential & Proprietary of VACOM 11/13 Page Date : 05-08-08, Rev No : 1.0
Control No.: MSD351A0VS500
Originated by Hard Ware 3 Team
Cell
VCO
LO Generation
&Distribution
Quadrature
Downconverter
Control
Circuits
S
B
I
LPF
LPF
RFR6122
ctls
(2) VDDM
(3) SBDT
(4) SBCK
(5) SBST
(28) RX_IP
(27) RX_IM
(25) RX _QP
(26) RX _QM
Gr ound slugGND
LNA_IN (6)
R_LNA (7)
LNA
VDDA
(18 ) LO_OUT (16) VCO_TUNE
( 30) TCXO
RFR6122 Block diagram
3.3.2.6 Others of RFR6122 (U511)
Numerous secondary functions are integrated on-chip; the RX LO generation and distribution circuits,
the UHF(Cellular-CDMA) VCO circuits, and various interface, control and status circuits,
3.4
TRANSMITTER PART
- RFT6122 ( Baseband to RF transmitter IC of qualcomm’s radioOne Zero-IF chipset. )
- Power Amp
- TX Frequency Band Pass Filter
- Power Detection circuits
- Isolator
3.4.1 MAIN FUNCTION
- Quadrature Modulation and Upconvertion
- Filtering
- Power Amplify
- Tx AGC
- Power detection
3.4.2 BASIC OPERATION
I and Q differential baseband Signals from MSM6000 are changed to Tx RF Signal through quadrature
upconverter and drive to gain controlled amplifier. This signal is input to Power Amplifier through
passing RF SAW FILTER and then it is amplified as high power and radiated through duplexer and