參數(shù)資料
型號: SA572D
廠商: NXP SEMICONDUCTORS
元件分類: 運動控制電子
英文描述: Programmable analog compandor
中文描述: COMPANDER, 0.02 MHz BAND WIDTH, PDSO16
封裝: 7.50 MM, PLASTIC, MS-013, SOT-162-1, SOP-16
文件頁數(shù): 8/12頁
文件大?。?/td> 136K
代理商: SA572D
Philips Semiconductors
Product specification
SA572
Programmable analog compandor
1998 Nov 03
8
+
A1
(7,9)
R5
R2
(3,13)
(8)
(16)
CA
1
μ
F
CR
10
μ
F
(4,12)
(2,14)
1k
(6,10) R6
17.3k
(5,11)
BUFFER
A2
R4
R3
V
OUT
V
IN
C
IN1
C
IN2
C
IN3
2.2
μ
F
V
REF
R1
6.8k
+VB
+V
CC
G
2.2
μ
F
C1
2.2
μ
F
SR00700
Figure 7. Basic Expandor Schematic
Basic Compressor
Figure 8 shows the hook-up of the circuit as a compressor. The IC is
put in the feedback loop of the OPA A
1
. The system gain expression
is as follows:
V
OUT
V
IN
I
1
2
R
2
R
1
R
3
V
IN(AVG)
1
2
(7)
R
DC1
, R
DC2
, and CDC form a DC feedback for A
1
. The output DC
level of A
1
is given by
V
ODC
V
REF
1
R
DC1
R
DC2
R
4
(8)
V
B
R
DC1
R
DC2
R
4
The zener diodes D
1
and D
2
are used for channel overload
protection.
(7,9)
BUFFER
V
REF
R1
6.8k
G
R4
RDC1
RDC2
9.1k
CDC
10
μ
F
9.1k
D1
D2
A1
1R3
C1
1k
(6,10)
R5
(5,11)
(2,14)
(4,12)
CR
CA
1
μ
F
(8)
(3,13)
R2
(16)
C
IN3
2.2
μ
F
V
CC
.1
μ
F
C2
2.2
μ
F
C
IN1
V
IN
10
μ
F
C
IN2
2.2
μ
F
V
OUT
+
SR00701
Figure 8. Basic Compressor Schematic
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