NJM2210

The NJM2210 has the following features including It can compose Combtype Filter, with CCD IH delay line by that connect with;It can be useful as Switching Noise Reduce Mode and Gnheuce;Mode that are because of to Comb type Filter;Package Outline DIPB, DMP8;Bipolar Technology.

The NJM2210 is a video noise reducer IC of which operation is to reduce noise contained in video color and luminance signal and at the same time to correct outline of horizontal and vertical image signal.It is suit for VCR camera especially.It is an integrated circuit of composing variable comb type filter  Which  reduces noise mixed at chroma or luminance signal of VCR camera or others. Time delay element of comb type filter is fit to CCD delay element, not to glass delay line. The circuit is the most excellent FB with NULL system. Fig.l is its basic block diagram and Fig.2 is actual block diagram of NJM2210.This video noise reducer is composed of NJM2210, three capacitances for combination, one capacitance for signal bypass and CCD delay element. The NJM221(1 is applicable to both of chroma and luminous signal with each fitted CCD delay element. The control terminal for switching reduce and enhance operates as enhance (increasing of high frequency part) with high level input and reduce (decreasing of high frequency part) with low level input. Its threshold level is about 2.25V at SV supply voltage. Fig.4 is basic operating characteristics.

The NJM2210 operates automatically as noise reducer with low supply voltage to Pin 7 and signal enhancer with high voltage to Pin 7.Fig.7 shows output characteristics when applied high or low voltage to Pin 7. This system is adding and subtracting form of signals and so the output characteristic distortion comb type filter comes from phase phase difference of each system.The NJM2210  difference is 2 degree at 4MHz. High dynamic range of video is reallized by high supply voltage.Fig.8 shows vertical and horizontal enhance on display.