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| 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 processing), AN2460 (chroma signal processing), etc., it configures a VHS signal processing system. 1 16 0.8 Unit : mm 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 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. 8 0.10.1 9 0.15 0.350.1 4.30.3 0.5 6.30.3 16-Pin PANAFLAT Package (SSOP-016-P-0225a) s Block Diagram VCC 16 15 14 13 12 11 10 9 0.65 1.50.2 GCA 8.1dB CEQ -2.1dB B1 -13.2dB 20dB A1 -20.8dB - 0.8dB -2.1dB B2 -13.2dB 0dB EF 20dB Lim. -9.5dB SW CTL COR 33k 22k LPF Det. A2 1 2 GND 3 4 5 6 7 8 6.50.3 1 |
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