MSK641(2000) View Datasheet(PDF) - M.S. Kennedy
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MSK641 Datasheet PDF : 6 Pages
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COMPLETE VIDEO SYSTEM
Figure 3 above shows how an MSK 620 and MSK 641 can be used to drive a 100MHz monochrome monitor. The video signal
is A.C. coupled through C1. The video output pin of the MSK 620 rests at approximately +3.9Vdc and the input of the MSK 641
should be D.C. biased at approximately +1.55Vdc. D1, D2, D3 and Q1 act as a level shifting stage to match the output of the
MSK620 and the input of the MSK641. R8 and R9 sample the output and feed it back to the clamping section of the MSK 620 for
black level control superior to simply sampling from pin 14 of the MSK 620.
5
Rev. B 8/00
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