Overview

The LA7437, 7437A is a video signal processing single chip IC that handles the PAL-G, B and I, 4.43 NTSC, and MESECAM formats. IC internal trimming is used to make the LA7437, 7437A is completely adjustment free, and in combination with a special-purpose CCD (the LC89973M) it provides a significant reduction in external components, including the glass delay line. Thus the LA7437, 7437A can significantly reduce the signal processing board manufacturing costs. Furthermore, the LA7437, 7437A supports the NAP format (NTSC to PAL conversion) that is poised to become widespread in Europe, China and other markets.

特性 Features

? Completely adjustment free

The AGC, carrier, deviation, and PB-Y level are adjustment free.

The YC record current can also be made adjustment free by using the LA7437, 7437A as the head amplifier.

? Support for NAP and PAL color array correction

Full modulation using a balanced modulator allows playback and conversion to PAL format of NTSC signals recorded on tape.

? Crosstalk exclusion in combination with a specialpurpose CCD

Crosstalk can be excluded without using a glass delay line by combining the LA7437, 7437A with a specialpurpose CCD (the LC89973M).

? Minimal number of external components New built-in components:

— Detail enhancer CR

— C-trap in the Y low-pass filter

— Playback C low-pass filter

? High performance and multiple functions

Linear phase picture controller

Double high-pass noise canceller, high-speed AFC, DCC

New built-in functions

— NAP circuit

— AVNS (advanced vertical noise suppresor)

— Automatic QH insertion

— FM AGC

? Miniature package (42-pin DIP)