Patent ID: 11961553
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. The method of claim 8, wherein the X-intercept is obtained based on Equation 2, Equation 3 and Equation 4 as follows:

 
  
   
    
     
      
       -
       
        b
        a
       
      
      =
      
       
        
         ∑
         
          
           X
           i
           2
          
          ⁢
          
           ∑
           
            Y
            i
           
          
         
        
        -
        
         ∑
         
          
           X
           i
          
          ⁢
          
           ∑
           
            
             X
             i
            
            ⁢
            
             Y
             i
            
           
          
         
        
       
       
        
         ∑
         
          
           X
           i
          
          ⁢
          
           ∑
           
            Y
            i
           
          
         
        
        -
        
         
          (
          
           n
           -
           1
          
          )
         
         ⁢
         
          ∑
          
           
            X
            i
           
           ⁢
           
            Y
            i
           
          
         
        
       
      
     
     ;
    
   
   
    
     Equation
     ⁢
        
     2
    
   
  
 

Xi=(xi+xi+1)/2;  Equation 3

Yi=yi+1−yi,  Equation 4

Wherein, in Equation 3, xi and xi+1 denote an (i+1)-th read voltage level and an (i+2)-th read voltage level, respectively, and i is an integer greater than or equal to zero and less than or equal to (n−2), and in Equation 4, yi and yi+1 denote an (i+1)-th cell count value and an (i+2)-th cell count value, respectively.