STB4395 Datasheet, PDF (7/16 Pages) STMicroelectronics – CT2 RECEIVER/TRANSMITTER

2 - BLOCK DIAGRAM
Figure 1
RF S AW
8 6 6 .0 5 MHz
LC
IF S AW
STB4395
61 60
56 55
1 5 0. 4 MHz
51 50
NTXEN
4
NP RGEN
1
S yn the s ize r
Contro l
P RGCLK
2
P RGD
3
I
IQ Inp ut
Da ta
Q
P A/LNA
CONTROL
1
1
1 CONTROL
1
DECODER
15
IQ Modu lator
÷2
LNA ^{1s t}
Mixe r
PA
Tx
Mixe r
Tx
DIVIDER
Rx
DIVIDER
2nd Mixe r
S AWO
47
NSAWO
46
NIF2O
44
IF2O
43
IF2I
41
NIF2I
40
1 .7 MHz
LC
S YNCLK
1 4 .4 MHz
12
VCO
TANK
VCOO
14
NVCOO
15
P LL
F ILTER
F LTRO
16
Tra ns mit
VCO
3 0 0 .8 MHz
P HASE
DETE CTOR
CHARGE
P UMP
Cha nne l
VCO
71 6.45 MHz
STB439 5
24 25
21
P HASE
P HASE
DETE CTOR DETECTOR
CHARGE
P UMP
CHARGE
P UMP
DATA
S LICER
FM
Mod u la to r
37 RS S I
VCOI
35
NVCOI
34
VCO
TANK
F LTRI
33
Re ce ive
VCO
1 5 2. 1 MHz
P LL
FILTER
18 19 20 27 28 31
29 30
VCO
TANK
P LL
F ILTER
Da ta
Out
5 0 kHz
Bit Ra te Filter
DEMOD.
TANK
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