LA3460M-X (IC31) : FM noise canceller & Stereo MPX demodulator
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DRIVER
HPF
LPF
LPF
LPF
PC
PD
VCO
VCO STOP
FF
MAIN
SCHMIT
PACAN
SEPARATION
ADJ.
SUB
ANTI-BRIDGE
DECODER
SNC
CONTROL
HCC
GATE
TRIG
AGC
1. Pin layout
2. Block diagram
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24
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3. Pin function
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Noise sensitivity adjustment
Vcc=+8.0V
High pass filter
Stereo noise controlled voltage
High cut controlled voltage
pilot cancel signal input
pilot cancel signal outpt
Ceramic resonator
Phase comparator low pass filter
Phase comparator low pass filter
Phase locked loop signal input
Active low
Composite signal input
Noise sense
Noise AGC
Gate time
Signal hold
Pilot output
Vcc
Capacitor for HCC
SNC control
HCC control
Lch output
Rch output
Pican input
Pican output
Separation ADJ
NC
NC
456kHz OSC
Phase comp LPF (+)
Phase comp LPF (-)
GND
PLL input
Stereo indicator
Composite input
Pilot det LPF
Pin
No.
Function
Description