TEA0679 NXP Semiconductors, TEA0679 Datasheet - Page 34
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TEA0679
Manufacturer Part Number
TEA0679
Description
I2c-bus Controlled dual Dolby* B-type Noise Reduction Circuit for Playback Applications
Manufacturer
NXP Semiconductors
Datasheet
1.TEA0679.pdf
(40 pages)
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Channel A: Decode mode: pre-amplifier 30 dB and EQ amplifier 10 dB linear.
Channel B: Encode mode.
BEN
32
1
MAD
SDA
31
2
BSC
220 nF
I
2
C-BUS
SCL
30
3
TD
R t
(ref)
output B
output A
DGND AMS
29
4
BTC
47 nF
EQS
(opt)
10 F
10 F
28
5
EQS
OUTB
27
6
OUTA
MUTE
Fig.41 Test circuit for frequency response (channel B).
INTB
26
7
INTA
330 nF
330 nF
270 k
270 k
RISE TIME
LATCH
DELAY
TIME
AND
DOLBY B
DOLBY B
180 k
CONTRB
25
8
CONTRA
180 k
100 nF
100 nF
DETECTOR
PROCESSOR
LEVEL
HPB
24
9
HPA
15 nF
AMS
15 nF
TP
TP
SCB
23
10
SCA
4.7 nF
4.7 nF
BLANK
SKIP
24 k
24 k
LOGIC
EQB
22
11
EQA
20 k
20 k
10 F
10 F
10 k
AMP
AMP
EQ
EQ
EQFB
21
12
EQFA
10 k
100
nF
AGND
20
13
10 V
V CC
10
F
V CC
V i
SUPPLY
POWER
25 k
25 k
25 k
25 k
10 F
PRE
AMP
PRE
AMP
INA1
INB1
470
pF
V i
19
14
200
(opt)
HS
TEA0679T
HS
18
15
V ref
100
F
INB2
17
16
INA2
MHB156
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