AN3497SB Datasheet, PDF (1/1 Pages) Panasonic Semiconductor – Chroma Noise Reduction IC

ICs for VCR
AN3497SB
Chroma Noise Reduction IC
s Overview
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 process-
ing), AN2460 (chroma signal processing), etc., it config-
ures a VHS signal processing system.
s Features
• 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 adjust-
ed depending on external DC.
• The feedback constant (KC) can be set optionally depend-
ing 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.
Unit : mm
1
16
8
9
4.3±0.3
0.5
6.3±0.3
16-Pin PANAFLAT Package (SSOP-016-P-0225a)
s Block Diagram
V_CC
16
15
8.1dB
CEQ
–2.1dB
B2
–13.2dB
1
2
GND
14
13
12
11
10
–2.1dB
GCA
B1
–13.2dB
20dB 20dB
A1
–20.8dB
Lim.
0dB
EF
3
4
CTL
A2 ^{33kΩ 22kΩ}
COR
LPF
5
6
7
9
SW
Det.
8
1