tda9847t NXP Semiconductors, tda9847t Datasheet - Page 3
tda9847t
Manufacturer Part Number
tda9847t
Description
Tv And Vtr Stereo/dual Sound Processor With Digital Identification
Manufacturer
NXP Semiconductors
Datasheet
1.TDA9847T.pdf
(28 pages)
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Input and output levels are nominal values related to the SCART norm (AM: m = 0.54, FM: f = 27 kHz).
tan
250 mV RMS
V i1
L + R
250 mV RMS
(AM: 500 mV RMS)
2.2 k
3.3 nF
2
V i2
C DCL
0.002
, A
C AGC
R FP
C FP
C LP
R, B
100 nF
2.2 F
2.2 k
30 k
10 F
10 nF
47 pF
2.2 F
Q o = 70
2.5 mH
10
9
7
6
4
5
15 k
35 k
50 k
3 dB
3 dB
V ref
0 dB
3 dB
6 dB (AM)
V ref
0 dB
25 k
V ref
Fig.1 Block diagram of the bipolar TV/VTR-stereo decoder.
V ref
25 k
TDA9847
10 k
10 MHz
OSCILLATOR
5 k
DIGITAL
PLL
A/mono
23
10 k
10 nF
L
5 k
5%
C D1
DEMODULATOR
DEMODULATOR
17
DIGITAL PLL
DIGITAL PLL
100 F/
16 V
1/2 V P
C D2
V ref
C ref
AND
AND
21
10 nF
8
250 mV RMS
V ref
V ref
5%
L/A/mono
SUPPLY
250 mV
RMS
V P
R/B
250 mV
250 mV
22
50 k
50 k
2.2 F
AM
20
INTEGRATOR
INTEGRATOR
V i4 V i3
SCART
RMS
RMS
12
DIGITAL
DIGITAL
mute
11
POWER-ON
250 mV RMS
2.2 F
RESET
(274 Hz)
(117 Hz)
dual bit
stereo
bit
6 dB
6 dB
6 dB
6 dB
CONTROL
LOGIC
500 mV RMS
500 mV RMS
500 mV RMS
500 mV RMS
MED803
14
13
16
15
19
18
24
1
2
3
stereo transmission
dual transmission
V o1
V o2
V o3
V o4
SCART
main
C1
C2
C3
C4
1 k
V P
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