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关于应用笔记CN0319

		
	
				

			

									
					    chenxiaoli
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Jul 20, 2014 
				
			
			
		

		
		                     
				
        		

		    
		    		    
		    			

			    
应用笔记中有以下电路:     见附件1

 
  

 
 谁能讲讲这个电路的原理  如何得出R12 处的电压的？？

 
笔记上说R12=（Vrloop+Vref）*R2/(R1+R2)-Vrloop

			

			
									
		                             
                        

    

                                            
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