AK2346B Datasheet, PDF (3/31 Pages) Asahi Kasei Microsystems – Two-way Radio Audio Processor

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