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AD630 overshoot & ring-down as a modulator



		

			

									
					    ambios
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 15, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  AD630 
    
    		        		    		    	
			
    Hello,
    

    I'd like to use the AD630 as a lock-in amplifier for small amplitude 1KHz optical signal. Because it's easier to analyze I designed a simple modulator. 1KHz modulator. I'm seeing large spikes at the edges of the modulated signal shown in the scope image below. I presume that this may be related to phase off-set, but I'm not sure. Can you suggest how I can resolve these spikes before trying to move to the lock-in design?
    

    Thanks,
    

    Patrick
    

     
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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