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LM1881 video synchronization Circuit diagram as a simple ana

2015-01-10 09:13  
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 74hc4066,LM1881The chips include an ATmega88 as the main controller, an AD9280 ADC, an LM6134 high-speed quad op-amp, an LM1881 video sync separator, a 74HC4066 as a simple analog switch, and an RS-232-level converter.LM1881 Video sync separator extracts timing information including composite and vertical sync, burst/back porch timing, and odd/even field information from standard negative going sync NTSC, PAL* and SECAM video signals with amplitude from 0.5V to 2V p-p.SCART pins used in RGB mode:5  RGB Blue Ground 7 RGB Blue Signal  (0.7Vpp 75 ohm) 9 RGB Green Ground11 RGB Green Signal (0.7Vpp 75 ohm)13 RGB Red Ground15 RGB Red Signal (1Vpp 75 ohm)17 Composite Video Ground19 Composite Video Out (1Vpp 75 ohm)20 Composite Video In  (1Vpp 75 ohm)