NJM2228D(2004) データシートの表示（PDF） - Japan Radio Corporation

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NJM2228D
(Rev.:2004)

VIDEO SUB-CARRIER SIGNAL DOUBLER/TRIPLER

Japan Radio Corporation  

NJM2228

VIDEO SUB-CARRIER SIGNAL DOUBLER/TRIPLER

■ GENERAL DESCRIPTION

The NJM2228 is a doubler / tripler oscillator based on video sub-

carrier frequency using PLL circuit technique.

The NJM2228 is suit to standard clock generator of CCD clock

and onscreen display.

■ FEATURES

● Operating Voltage

(+4V to +6V)

● Good input sensitivity

VIN=120mV MIN.

● Maximum oscillation frequency

20MHz.

● Switch function of doubler / tripler

● Package Outline

DIP8, DMP8

● Bipolar Technology

■ APPLICATION

● VCR Video Camera AV-TV

Video Disc Player

■ PIN CONFIGURATION

■ PACKAGE OUTLINE

NJM2228D

NJM2228M

NJM2228D

NJM2228M

■ BLOCK DIAGRAM & EXTERNAL COMPONENTS

There is stray capacity assembled on PC board, and so select Rx, Cx to the value which pin 2 voltage (search

voltage at VCO locked) becomes about 2V. Cx>5pF, 5.6k>Rx>3.3kΩ.

NTSC

PAL

3 multiplier 2 multiplier 3 multiplier 2 multiplier

Cx

10p

22p

8p

15p

Rx

4.7k

4.6k

3.9p

4.6k

Ver.2004-02-17

-1-

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