TDA7340G Datasheet, PDF (18/27 Pages) STMicroelectronics – AUDIO SIGNAL PROCESSOR

TDA7340G
Figure 4: Block Diagram of the Noise Blanker
MPX IN
LEVEL
VR
VSB
80KHz LP
SIGNAL PATH
140KHz HP
AMP
120KHz HP
LEFT
RIGHT
BUF
RECT
PEAK AUTOMATIC
THRESHOLD
CONTROL
BLANK COMP
PEAK COMP
-
REF.
-
+
+
ATC PEAK+VTH
40µs
5
RECT-PEAK
2
4
I2C-BUS
ADDITIONAL THRESHOLD
CONTROL
(ATC-SB, MPX_RECT)
D95AU330
RPEAK
82KΩ
CPEAK
47nF
CBLANK
330pF
to OUTPUTS
Figure 5: Trigger Threshold vs. Vpeak
VTH
MIN. TRIG. THRESHOLD
8 STEPS
65mV
30mV
0.9V
D95AU331
260mV(01)
220mV(10)
180mV(11)
140mV(00)
NOISE ADJUSTED
TRIG. THRESHOLD
1.5V
VPEAK(V)
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