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TDA7340G 数据表(PDF) 18 Page - STMicroelectronics

部件名 TDA7340G
功能描述  AUDIO SIGNAL PROCESSOR
PDF  27 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TDA7340G 数据表(HTML) 18 Page - STMicroelectronics

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background image
80KHz LP
SIGNAL PATH
ATC
AUTOMATIC
THRESHOLD
CONTROL
PEAK+VTH
RECT-PEAK
BUF
PEAK
AMP
RECT
-
+
PEAK COMP
REF.
BLANK COMP
2
4
5
I
2
C-BUS
ADDITIONAL THRESHOLD
CONTROL
(ATC-SB, MPX_RECT)
40
µs
LEFT
RIGHT
to OUTPUTS
MPX IN
VR
VSB
CPEAK
47nF
RPEAK
82K
Ω
CBLANK
330pF
D95AU330
-
+
140KHz HP
120KHz HP
LEVEL
Figure 4: Block Diagram of the Noise Blanker
65mV
30mV
8 STEPS
NOISE ADJUSTED
TRIG. THRESHOLD
MIN. TRIG. THRESHOLD
260mV(01)
220mV(10)
180mV(11)
140mV(00)
0.9V
VTH
1.5V
VPEAK(V)
D95AU331
Figure 5: Trigger Threshold vs. Vpeak
TDA7340G
18/27



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