3. Block Diagram
3-1 RF Block Diagram
Samsung Electronics
3-1
LNA
bias
circuit
RX
SAW
LPF
RX
SAW
filter
IF
SAW
filter
/6
PLL1
Dual
synth.
PLL2
RF VCO
1160 ~ 1185 MHz
890 ~ 915 MHz
Ant S/W
P.A.
935 ~ 960 MHz
225 MHz
45 MHz
LMX2336L
VCTCXO
13MHz
TCO-999
LC
filter
I & Q
Demo.
45 MHz
270 MHz
HD 155101BF
540 MHz
270 MHz
270 MHz
270 MHz
Phase
Detector
90 deg
Shift /2
90 deg
Shift /2
/2
Loop
filter
TX VCO
B.B.
Block
I
O
I
O
AGC
TX
SAW
I & Q
Mod