PANASONIC AN3497SB

ICs for VCR
AN3497SB
Chroma Noise Reduction IC
■ Overview
Unit : mm
1
16
8
9
0.35±0.1
6.5±0.3
0.8
The AN3497SB is a chroma noise reduction (CNR) IC
for VCR and uses a chroma recursive filter system. In
combination with the AN2260 (luminance signal processing), AN2460 (chroma signal processing), etc., it configures a VHS signal processing system.
0.65
1.5±0.2
0.1±0.1
• Capable of meeting with the NTSC/PAL system.
• Capable of meeting with the EDIT mode and THRU
mode.
• The CNR limiter level and CNR output level can be adjusted depending on external DC.
• The feedback constant (KC) can be set optionally depending on an external resistor.
• The chroma signal can be adjusted depending on an
external resistor.
• Built-in functions such as Y vertical correlative signal
detector, etc.
0.15
■ Features
4.3±0.3
0.5
6.3±0.3
16-Pin PANAFLAT Package (SSOP-016-P-0225a)
■ Block Diagram
VCC
16
15
14
13
12
11
10
9
SW
GCA
B1
–2.1dB
–13.2dB
20dB
A1
20dB
CTL
Lim.
–20.8dB
–2.1dB
–13.2dB
B2
0dB
A2
COR
2
3
Det.
33kΩ 22kΩ
EF
1
–9.5dB
CEQ
– 0.8dB
8.1dB
LPF
4
5
6
7
8
GND
1