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3. TECHNICAL BRIEF
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The UMTS LNA output is routed to the RFR6200 through a band selection filter that transforms a
single-ended 50
Ω
source to a differential impedance that is matched to the RFR6200 IC. The RFR input
uses a differential configuration to improve second-order inter-modulation and common mode rejection
performance. The RFR6200 input stages include MSM-controlled gain adjustments that further extend
receiver dynamic range.
The RFR6200 IC (Figure 3.3.1-2) provides the UMTS Zero-IF receiver signal path, from RF to analog
baseband. The input gain stage implements MSM controlled gain adjustments to extend receiver
dynamic range. The amplifier output drives the RF port of the quadrature RF-to-baseband
downconverter then the downconverted baseband outputs are routed to lowpass filters (one I and one
Q) whose passband and stopband characteristics are suitable for DS-WCDMA signals. The filter
outputs are buffered and routed to the MSM device for further processing. This baseband interface is
shared with the RTR6250 EGSM/DCS/PCS receiver outputs.
Figure 3.3.1-1 RFL6200 IC functional block diagram
Figure 3.3.1-2 RFR6200 IC functional block diagram
S
B
I
Bias and
Control
Circuits
UMTS_IN
UMTS_OUT
VDDA
R_BIAS
GND
UMTS_BIAS
VDDM
SBCK
SBST
SBDT
Ground Slug
GND
GND
GND
RX_IM
RX_IP
ground slug
GND
UMTS_INM
UMTS_INP
RX_QM
RX_QP
TCXO
LO_INP
LO_INM LO_OUT
Bias
Ckts
R_BIAS
LO Generation
& Distribution
S
B
I
Control
Circuits
VDDM
SBCK
SBST
SBDT
ctls
VDDA
LPF
LPF
Quadrature
Downconverter
Содержание U8210
Страница 22: ...3 TECHNICAL BRIEF 23 Figure 3 2 1 1 RTR6250 IC Functional Block Diagram ...
Страница 37: ...3 TECHNICAL BRIEF 38 Figure 3 5 12 1 Bluetooth system architecture ...
Страница 110: ...4 TROUBLE SHOOTING 111 USB_D USB_D USB_VBUS X100 48M 48MHz ...
Страница 115: ...4 TROUBLE SHOOTING 116 LCD Control data flow ...
Страница 117: ...4 TROUBLE SHOOTING 118 LCD Control data flow ...
Страница 122: ...4 TROUBLE SHOOTING 123 TR400 ...
Страница 124: ...4 TROUBLE SHOOTING 125 FLASH_ON from Main Bíd PM6650 CN1 Flash LED ...
Страница 127: ...4 TROUBLE SHOOTING 128 FB503 CN500 FB502 CN2 CN1 ...
Страница 129: ...4 TROUBLE SHOOTING 130 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Страница 131: ...4 TROUBLE SHOOTING 132 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Страница 133: ...4 TROUBLE SHOOTING 134 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Страница 135: ...4 TROUBLE SHOOTING 136 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Страница 137: ...4 TROUBLE SHOOTING 138 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Страница 139: ...4 TROUBLE SHOOTING 140 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Страница 141: ...4 TROUBLE SHOOTING 142 MIC Contact C404 C401 ...
Страница 143: ...4 TROUBLE SHOOTING 144 C115 Head_Phone Input Pin 2 3 C102 CN304 R624 ...
Страница 146: ...4 TROUBLE SHOOTING 147 Receptacle 4 6V 4 6V ...
Страница 151: ...5 BLOCK DIAGRAM 152 Top Side ...
Страница 152: ...5 BLOCK DIAGRAM 153 Bottom Side ...
Страница 154: ...6 DOWNLOAD 155 It is ready for downloading ...
Страница 160: ...6 DOWNLOAD 161 6 Click on Download to download ...
Страница 165: ...6 DOWNLOAD 166 Downloading the Module image Finally Download has been complete ...
Страница 168: ...6 DOWNLOAD 169 When you meet the NV Restore error Connect to the phone ...
Страница 170: ...6 DOWNLOAD 171 Select the proper file and click on Restore Reading the NV file and restore NV ...
Страница 200: ... 201 9 PCB LAYOUT ...
Страница 201: ... 202 9 PCB LAYOUT ...
Страница 202: ... 203 9 PCB LAYOUT U8210 KEYPAD SPEY0032001 1 1 TOP ...
Страница 203: ... 204 9 PCB LAYOUT ...
Страница 204: ... 205 9 PCB LAYOUT ...
Страница 206: ... 207 ...
Страница 207: ... 208 ...