AK2347B Datasheet, PDF (3/34 Pages) Asahi Kasei Microsystems – Two-way Radio Audio & Sub-Audio Processor

ASAHI KASEI
[AK2347B]
4. Block Diagram
TXINO ³
TC
EM
4
TXIN
RXINO ²³
-
+
TXA1
VR1
(HPF)
Com-
pressor
-6 to +4.5/1.5dB
Pre-
Emphasis
TXRX
24
RXIN
-
+
RXA1
22
FILTERO
VR3
RXLPF
-4 to +3.5/0.5dB
FILSW2,1
fc = 300Hz
TX/RX
_HPF
HPF
5
6
-
+
TXA2
Scrambler/
Descrambler
TXRX PCONT
7
TXSW2,1
Adder
LMT
Limiter
VR2
Splatter
8
SMF
De-
Emphasis
RXSW
EM
-9.6 to +3.0
/0.2dB
Expan-
der
fc = 2.55kHz
/3.0kHz
VR4
21
SMF
-18,-4.5 to +4.5
TC
/0.25dB
MOD
RXOUT
3.6864MHz
/ 3.579545MHz
DINO
DIN
20
19
-
+
DTA1
Sub-Audio
Programmable
LPF
SASW
VR5
-6 to +6/ 0.5dB
SASW
17 18
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
Control
Register
10 11 12 13
16
9
+
AGND
1
2
+
+
14
OSC ₁₅
XIN
XOUT
MS1419-E-00
-3-
2012/05