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差分输入需要与运放共地吗，不共地的话，差分信号是怎么通过运放形成回路的



		

			

									
					    wjmmrm
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 10, 2020 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
     差分输入需要与运放共地吗，不共地的话，差分信号是怎么通过运放形成回路的，如本图所示，求大神指教
    
									
			        
		
    

				
						
        

    
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                 放大器
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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