NE577 Philips Semiconductors, NE577 Datasheet - Page 3

• Manufacturer Part Number: NE577
• Description: Unity Gain Level Programmable Low Power Compandor
• Manufacturer: Philips Semiconductors

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DataSheet
Philips Semiconductors
BLOCK DIAGRAM and TEST AND APPLICATION CIRCUIT
1993 Dec 15
C2
Unity gain level programmable low power compandor
*R1, R2 and R3 are 1% resistors.
+
EXP
EXP
CAP
V
2.2 F
IN
EXP
REF
4
OUT
10 F
U
C1
C4
10 F
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+
+
10 F
RECT
C3
R2*
+
IN
R1*
GND
1
2
3
4
5
6
7
RECTIFIER
10k
Figure 2. Block Diagram and Test and Application Circuit
GAINCELL
EXPANDOR
I
REF
G
10k
BANDGAP
V
GND
REF
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V
5k
CC
10k
1437
COMPRESSOR
30k
8.6k
30k
10k
GAINCELL
G
RECTIFIER
10k
10k
14
13
12
10
11
9
8
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10 F
COMP
COMP
+
10 F
C7
+
CAP1
R3*
NE/SA577
CAP2
RECT
GCELL
C5
Product specification
+
+
10 F
COMP
C9
+
V
IN
C8
CC
C6
IN
2.2 F
2.2 F
IN
COMP
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4U
4U
SR00717
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OUT
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