MAS9191AJ MAS [Micro Analog systems], MAS9191AJ Datasheet - Page 34

• Manufacturer Part Number: MAS9191AJ
• Description: Single Chip AMPS/ETACS/NAMPS Audio/Data Processor
• Manufacturer: MAS [Micro Analog systems]

APPLICATION INFORMATION
TEST CIRCUIT
DUPLEX
FILTER
1
2
3
4
components determine the gain of microphone amplifier A6
components determine the gain of SIDETONE amplifier A2
components determine RC time constant if DTMF receiver is used
NPN transistor for the buzzer
POWER
AMP
Typical MAS9191A application in AMPS/ETACS cellular system.
side tone
MIC
controller
micro
earphone
C
C
SYNTHESIZER
buzzer
FRONT END
3
RX VCO
TX VCO
R
DUAL
R
1
6.8
2
100nF
EXTEARP
RF
EXTMIC
Serial bus
R
R
100nF
100
C
C
100nF
22nF
1nF
32
19
18
17
20
27
29
30
28
31
26
A6
A6
C
DEMODULATO R
A3
VDD
A4
DTMF Receiver
34
4
R
VCXO
IF
35
side tone
36
MAS 9191A
16
22nF
22nF
39
15
40
13
22nF
22nF
41
14
DAC
RX
TX
MAS9191A
AUDIO/DATA
PROCESSOR
42
11
22nF
22nF
45
12
46
4
22nF
22nF
47
3
57
56
48
49
2
1
22nF
100nF
100nF
22nF
4.8MHz
RF Modulator
IF
1M
DA9191A.000
July 31, 1997
22pF
22pF
CONTROLLER
Interfaces
- DISPLAY
- KEYPAD
MICRO
MEMORY
34