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LM2405T Scheda tecnica(PDF) 5 Page - National Semiconductor (TI) |
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LM2405T Scheda tecnica(HTML) 5 Page - National Semiconductor (TI) |
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5 / 7 page  Application Hints (Continued) signal traces from the preamplifier to the LM2405 and from the LM2405 to the CRT cathode should be as short as pos- sible. The following references are recommended: Ott, Henry W., “Noise Reduction Techniques in Electronic Systems”, John Wiley and Sons, New York, 1976. “Guide to CRT Video Design”, National Semiconductor Appli- cation Note 861. “Video Amplifier Design for Computer Monitors”, National Semiconductor Application Note 1013. Because of its high small signal bandwidth, the part may os- cillate when it is used in a typical application with a preamp in a monitor, if feedback occurs around the video amplifier through the chassis wiring. To prevent this, leads to the input circuit should be shielded, and input circuit wiring should be spaced as far as possible from output circuit wiring. Power should be removed as quickly as possible from an amplifier that is oscillating, since power dissipation in the part is very high in this mode and the part may be damaged if oscilla- tions continue and the power supply can supply more than 250 mA. TYPICAL APPLICATION A typical application of the LM2405 is shown in Figure 9. Used in conjunction with an LM1205, a complete video chan- nel from monitor input to CRT cathode can be achieved. Per- formance is satisfactory for all applications up to 1280x1024 non-interlaced, and pixel clock frequencies up to 130 MHz. www.national.com 5 |
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