Note : Refer attachment for detailed description
Issue :Output VGA Video is blanking.
Video standard used :VGA – 640 X 480 with 60Hz refresh rate.Problem faced : Observed output video on display is blanked every 2sec to 3 sec or ramdamly.
Scope Images :Plz refer the observed input VGA – HSYNC,VSYNC pulses(From VGA connector -CPU) & Coverted HSYNC,VSYNC (Display)from Differential to VGA Converter.
Please refer attachment for detailed description
For VGA to Differential R,G,B converter.I am Using
1.Single ended to Differential amplifier - AD8133
2.CSYNC Converter (From HSYNC and VSYNC) - Developed using EX-OR gate Resistor and Capacitors .
3.Green video(From VGA) + Csync adder/inserter - HFA1135
For Differential R,Gs,B to VGA converter
1.Differential to single ended converter - AD8145
2.SYNC separator -EL1883
3.SYNC stripper - AD8062.