44
Figure 9: RF Block Diagram
RXI 0.8Vp-p
RXQ 0.8Vp-p
V_REF=2.75
DCLK
AFCDAC
SPI RF CLK
SPI RF Data
Loop Filter
Tank
Crt.
Loop Filter
TX
RX
SW_RF
MA/ACON
T/R & RF SW
Cont. Circuit
PACIC
TX_EN
RX_EN
-10V
TX_KEY
DET_SW
SAT_DET
AOCDrive
R2.75
ENABLE
Ng. Lev. Sftr
for PA Contrl
Trans. IC
Phase
Charge Pump
Loop Filter
PA_B+
ENABLE
Det.
Loop Filter
Tank
CKT
B
A
-5V
Stripline
Dual Ant. Match
SFOUT=2.55
PLL_VCC
IQ Filter
+4.80V
TX_E
nDMCS
TXIP
TXIM
TXQP
TXQM
0.55 - 2.475
13 MHz
1.38 Vdc
RF_Start
IQ REF
1.38 Vdc
GIFSYN_IC
RX: 935-960 MHz
TX: 890-915 MHz
RX SENS: -102 dBm
TX Power: +33 dBM
T/R & RF Switch
SAW RX Filter
925-960 MHz
BipolarLNR
G=13 dB
I=5.5 mA
BipolarMIXER
G=12 dB
I=5.0 mA
215 MHz
SAW Filter
BW(2dB)
=200kHz
G=-6dB
Isolation Amplifer
G=7 dB
I=3.0 mA
NF=17 dB
IP3=-27 dB
430 MHz
IL=1.2dB
Pout=-3dBm
SBM=-140 dBc/Hz @ 800kHz offset
EXC
20 dB coupler
IL=0.2dB
0-1.9
Harmonic Filter
IL=0.2 dB
2 Stage GaAsIPA
G=21 dB
-5 to -15v
MMBR571
Driver
Po=12 dB
I=40 mA
ENABLE
TX VCO
890-915 MHz
=12 dBm
890-915 MHz
@-24 dBm
720-745 MHz
@-24 dBm
170 MHz
@-24 dBm
8 dB
PAD
LIM
OUT
Injection Filter
720-745 MHz
Main VCO
& Buffer Amp
720-745 MHz
I=13 mA
RX2.75
SW_VCC=2.55
DMCS
330 mVp
1.38 Vdc
Summary of Contents for cd 160
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Page 65: ...58 Issue 1 0 2 6 98 StarTAC 160 GSM Figure 27 StarTAC Parts Illustration ...
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