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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
					
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	

		
	















	

	

					



			








	
	
	
	



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													0
							
			
				
									
							        
            
                                    			
			                            
                        
                on Jun 13, 2017 8:21 AM
            
            
					
    
	
    

		
		
    
					
    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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													0
							
			
				
									
							        
            
                                    			
			                            
                        
                on Jun 13, 2017 8:21 AM
            
            
					
    
	
    

		
		
    
					
    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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