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TDA7403D Scheda tecnica(PDF) 13 Page - STMicroelectronics

Il numero della parte TDA7403D
Spiegazioni elettronici  BASIC SIGNAL PROCESSOR
PDF  26 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7403D Scheda tecnica(HTML) 13 Page - STMicroelectronics

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65mV
30mV
8 STEPS
NOISE CONTROLLED
TRIG. THRESHOLD
MIN. TRIG. THRESHOLD
260mV(00)
220mV(01)
180mV(10)
140mV(11)
0.9V
VTH
1.5V
VPEAK(V)
D97AU648
Figure 13. Trigger Threshold vs. VPEAK
VPEAK
(VOP)
D97AU649
20
DEVIATION(KHz)
0.9
1.2
2.0
2.8
DETECTOR OFF (11)
32.5
45
75
10
01
00
Figure 14. Deviation Controlled Trigger
Adjustment
2.3V(00)
0.9V
VPEAK
E’
D98AU863
1.8V(01)
1.3V(10)
MONO
STEREO
noisy signal
good signal
ATC_SB OFF (11)
NOISE
»3V
Figure 15. Fieldstrength Controlled Trigger
Adjustment
INGAIN
3.5 ... 11dB
STEP 2.5dB
INFILTER
LP 80KHz
4.th ORDER
DEMODULATOR
- PLOT CANC
- ROLL-OFF COMP.
- LP 25KHz
PLL +
PILOT-DET.
F19
NOISE BLANKER
F38
STEREO
HOLDN
SB CONTROL
DEEMPHASIS
+ HIGHCUT
t=50 or 75
µs
REF 5V
VSBL
LEVEL INTERN
HC
CONTROL
VHCCH
VHCCL
D
A
LEVEL INPUT
LP 2.2KHZ
1.th ORDER
LEVEL
FM_L
FM_R
MPX
100K
D98AU952
GAIN 0..10dB
Figure 16. Block diagram of the stereo decoder
TDA7403
13/26



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