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Observed output video on display is  blanked every 2sec to 3 sec or ramdamly.

tendulkar.selvam
on Jun 10, 2017

Dear All,

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

Regards,

Tendulkar S

attachments.zip
Parents
  • 0 on Jun 13, 2017 8:21 AM over 3 years ago

    Dear sir,

     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.

    Regards,

    Tendulkar S

Reply
  • 0 on Jun 13, 2017 8:21 AM over 3 years ago

    Dear sir,

     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.

    Regards,

    Tendulkar S

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