User Guide

3-1 Block Diagram
3. Block Diagram
3-1 RF Block Diagram
1805-1880MHz
925-960MHz
LNA LNA
Rx
SAW
filter
Rx filter
bias circuit
RF VCO
PLL1 PLL2
Dip.
LPF LPF
VC1 VC2
Ant. S/W
Dual synth.
IF VCO
540MHz
VCTCXO
13MHz
Mixer 1
Mixer 2
IF SAW
Filter
(225MHz)
GSM : 1150-1185MHz PCN : (Rx) 1580-1655MHz (Tx) 1575-1650MHz
880-915MHz
1710-1785MHz
Directional
Coupler
APC
PA Module
Tx VCO
Loop
fitter
Phase
Detector
I&Q
Mod.
I .I Q .Q I .I Q .Q
GSM : 270MHz DCS : 135MHz
GSM : 270MHz DCS : 135MHz
DCS : 270MHz
270MHz
÷ 2
÷ 6
90MHz 45MHz
HD155121F
GSM : 540MHz
90˚
Shift
÷ 2
90˚
Shift
÷ 2
Serial data
interface
LC
Filter
(45MHz)
PGA I&Q Demo.
CLK SDATA LE