ASAHI KASEI
[AK2346B]
4. Block Diagram
EXTLIMIN
LIMLV
5
7
Limiter
TX/RX
HPF
fc=300Hz
Scrambler
/De-
Scrambler
TXINO
TXIN
4
3
-
+
TXA1
VR1
(HPF)
-6~+4.5/1.5dB
6
Com-
pressor
Pre-
Emphasis
VR2
-9.2~+3.0/0.2dB
Splatter
fc=2.55kHz/
3.0kHz
SMF
MOD
RXINO
RXIN
22
23
-
+
RXA1
VR3
RXLPF
De-
Emphasis
Expan-
der
VR4
-18,-4.5~+4.5
/1.5dB
18
EXPOUT
19
-
+
RXA2
20
RXAF
RXAFIN
21
RXLPFO
TDATA
TCLK
DIR
SCLK
DI/O
RDF/FD
TEST
10
9
14
13
11
12
24
-4~+3.5/0.5dB
MSK
Modulator
Control
Register
MSK
BPF
MSK
Demodulator
16
OSC 15
XIN
XOUT
AGND
2
+
VDD
+
17
8
Power ON
Power ON
Power ON
Power ON
at Mode 1,2,3,4 at Mode 2,4 at Mode 3,4 at Mode 2,3,4
AGND
1
+
VSS
AGNDIN
MS1409-E-00
-3-
2012/05