NJM2209(2004) データシートの表示（PDF） - Japan Radio Corporation

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NJM2209
(Rev.:2004)

VIDEO PICTURE ENHANCER

Japan Radio Corporation  

■ TYPICAL APPLICATION

NJM2209

■ PRINCIPLES OF OPERATION, BI BLOCK DIAGRAM

The NJM2209 is a video signal IC which converts an input video signal to a compensated video signal of the picture

outline by adding an input signal through a differential amplifier to the original input signal.

The compensating (enhanced) ratio is decided by pin 5 voltage and so the original signal comes when pin 5 voltage is

zero.

A peaking frequency compensation of the internal

differential amplifier is changed by C,R attached to pin 8 and L,R to pin 7.

The compensation signal and the original video signal are delayed the phase by low pass filter.These are done by a

capacitor attached to pin 12. The compensated ratio is originally settled by the coupling condenser between pin 7 and pin

3.

HARD

Example (Multi-Burst Enhancer)

MID

SOFT

Ver.2004-02-17

-3-

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