Chroma Noise Reduction IC
ICs for VCR
AN3479FBP
VCR Signal(Luminance, Chroma and Normal Audio Signals) Processing IC
Unit:mm
s Overview
The AN34...
Description
ICs for VCR
AN3479FBP
VCR Signal(Luminance, Chroma and Normal Audio Signals) Processing IC
Unit:mm
s Overview
The AN3479FBP is an IC designed for NTSC-dedicated VHS VCR signal processing and incorporates circuits for processing RF and normal audio signals as well as luminance and chroma signals.
63 64
21.2±0.2 18.0±0.2 43
42
18.0±0.2 84 22 1.55±0.1 1 (1.0) 21
s Features
Compatible with I2C-bus Totally free of adjustments Low-frequency comb system An improved chroma S/N ratio ensured by built-in CNR and CPC(chroma phase compensator) circuits Compatible with SQPB
3.25±0.2
21.2±0.2
0.15–0.05
+0.10
1.55±0.1
0.6±0.2
0.80
0.35–0.05 Seating plane
+0.1
s Applications
VCR(NTSC)
QFH084-P-1818B
0.15–0.05
0.1±0.1
0° to 10° 0.6±0.2
+0.1
0.1±0.1
1
REC EQ 52 peak f variable REC EQ 53 LPF fC variable 54
AN3479FBP
PB Rec.
Rec.
Rec. PB
2
VCC(RF) VHS-H GND(NA) ROTARY 49 IN 50 63 43
SP/LP -on Rec. -off
62 S/V det. Det.
VV EE
61 8M trap 42 GND(RF) RF in/out AT-OUT 41 Det. AT 39
Int.
60
59
58
57
56
55
51
48
47
46
45
44
s Block Diagram
64 DO
SLP -on EE -on External S-VHS DOP PB RF EQ out
65 Sub LPF ENV
External peaking
PB-off
4 850 Ω PB : off
RF AGC 40 Y/C mix.
PB Rec.-Y -Y Rec.-C Ext.
66
W
1 250 Ω
67
EE Nor MODE SCL in CK off VV EE Internal peaking Test2
DEM Peaking BPF & GCA
D-lim.
629 kHz trap
LP/SLP-on
VCC(NA)
68 fH trap I2 C bus Clamp 3 MOD
Nor
38
Audio out AGC
SDA in
69
Rec. RF EQ 37
Test4
70 Det. Rotary ID Lim. ANR Lim. ...
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