PC BOARD LAYOUT CONSIDERATIONS

Input pins 2 6 and 10 are amplifier summing junctions All

connections to these points should be as short as possible

and should be separated from other signals The compo-

nents connected to these pins should be located close to

the LM2427 and the total conductor length connected to

these points should be no more than one inch

For optimum performance an adequate ground plane isola-

tion between channels good supply bypassing and minimiz-

ing unwanted feedback are necessary Also the length of

the signal traces from the preamplifier to the LM2427 and

from the LM2427 to the CRT cathode should be as short as

possible The following references are recommended

Ott Henry W

‘‘Noise Reduction Techniques in Electronic

Systems’’ John Wiley

Sons New York 1976

‘‘Guide to CRT Video Design’’ National Semiconductor Ap-

plication Note 861

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