compander - automatic gain control system
COMPANDER
INTRODUCTION
S1T8507C is a automatic gain control system that is used for dynamic range compression and expan...
Description
COMPANDER
INTRODUCTION
S1T8507C is a automatic gain control system that is used for dynamic range compression and expansion. By companding the signal , this can reduce the noise components. S1T8507C includes compressor, expander, pre-amp, filter amp, limiter and mute/bypath logic.
20−DIP−300A
FEATURES
Wide Supply Voltage ( 2.4 to 7V ) Easy Gain Control Mute/Bypath Logic Data In/Out Pin
20−SOP−375
ORDERING INFORMATION
Device S1T8507C01-D0B0 S1T8507C01-S0B0
Package 20−DIP−300A 20−SOP−375
Operating Temperature −20°C to +70°C
S1T8507C
1
S1T8507C
COMPANDER
BLOCK DIAGRAM
CPI- 7
3.3K
5.1K
-
CPI+ 8
+
EPI- 16 EPI+ 15
+
AGIC 5
Bypath
CRC 6
Rectifier
Variable Resistor
Summing Amp
CB Bypath
Variable Resistor
Rectifier
17 18 DO ERC
DI CO 43
Compressor Output Buffer
Compressor Mute
FI 2
Filter Amp
+
-
Limiter
Logic
Summing Amp
Expandor Mute
19 EO
Bias Circuit
9 14 10 CB EB GND
1 Fo
11 CMUTE 12 BYPATH 13 EMUTE
20 Vcc
PIN CONFIGURATION
FO 1 FI 2
CO 3 DI 4
AGIC 5 CRC 6 CPI- 7 CPI+ 8
CB 9 GND 10
KA8507 S1T8507C
20 Vcc 19 EO 18 ERC 17 DO 16 EPI15 EPI+ 14 EB 13 EMUTE 12 BYPATH 11 CMUTE
2
COMPANDER
S1T8507C
PIN DESCRIPTION
Pin No Symbol
Description
1 FO Filter Amp Output
2 FI Filter Amp Input
3 CO Compressor Output
4 DI Data Input
5 AGIC AC Gain Infinity Capacitor
6 CRC Compressor Rectifier Capacitor
7 CPI − Compressor Inverting Input
8 CPI + Compressor Non-Inverting Input
9 CB Compressor Reference Bias
10 GND Ground
Pin No 11 12 13 14 15...
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