Patent ID: 11934216
Assignee: HEFEI AICHUANGWEI ELECTRONIC TECHNOLOGY CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 6:
7. A precision adjustment method for the constant current generation circuit according to claim 1, comprising the following steps of:
step 1, calculating a current outputted by the current generation circuit, wherein a calculation formula of the current is as follows:, TC
   
    
     I
      
    
    3
   
  
  =
  
   
    
     
      I
      1
     
     
      
       I
       1
      
      +
      
       I
       2
      
     
    
    ×
    
     (
     
      
       TCv
       t
      
      -
      
       TC
       
        R
        4
       
      
     
     )
    
   
   +
   
    
     
      I
      1
     
     
      
       I
       1
      
      +
      
       I
       2
      
     
    
    ×
    
     (
     
      
       TCv
       t
      
      -
      
       TC
       
        R
        5
       
      
     
     )
    
   
  
 

wherein I1 represents an output current of a negative temperature coefficient current generation circuit; I2 represents an output current of a positive temperature coefficient current generation circuit; I3 represents an output current of the current generation circuit; TCI3 represents a temperature coefficient of the current I3; TCR4 represents a temperature coefficient of a resistor R4; TCR5 represents a temperature coefficient of a resistor R5; and TCvt represents a temperature coefficient of a thermal voltage Vt of a semiconductor integrated circuit technology;
step 2, the current I3 passes through a precision adjustment circuit, and a calculation formula of the output current is as follows:, I
   OUT
  
  =
  
   
    
     A
     
      Q
      9
     
    
    
     A
     
      Q
      
       1
       ⁢
       0
      
     
    
   
   ×
   
    I
    3
   
  
 

wherein AQ9 represents an area of an emission region of a triode Q9, and AQ10 represents an area of an emission region of a triode Q10.