======================CURRENT_MIRRORS======================
          
          
basic mirror          |_____            
                      |_    |     _| 
                  1X    `|__|___|'    
                NPN   <-'|      |`->         
                      |            |
                      |____________|    
                                  _|_   
                                  ///  
          
----------------------------------------------------------------------------

base I compensarted       _|
                       _|'
                      | |`->_            
                      |_     |     _| 
                  1X    `|___|___|'    
                NPN   <-'|       |`->          
                      |             |
                      |_____________|    
                                   _|_   
                                   /// 

----------------------------------------------------------------------------
          
George Wilson,        an integrated circuit design engineer working for Tektronix.(Late 60s)  
                      Rumour has it that Wilson came up with this configuration after
                      challenged to come up with useful new circuit that used three active devices
          
                                  _|     
Wilson mirror         |_________|'  
                      |         |`->
                      |      ______|   
                      |_    |     _| 
                  1X    `|__|___|'    
                NPN   <-'|      |`->         
                      |            |
                      |____________|    
                                  _|_   
                                  ///  
          
----------------------------------------------------------------------------
          
Widlar mirror         |_____       |             
                      |_    |     _|   
                  1X    `|__|___|'       
                NPN   <-'|      |`->        
                      |            \   
                      |        60K /
                      |            \
                      |____________|    
                                   |   
                                  _|_   
                                  ///  
          
          
----------------------------------------------------------------------------
          
          
                      |_____   _____|             
                      |_    | |    _|10X NPN  
                  1X    `|__| |__|'             
                NPN   <-'|       |`->            Vbe = (KT/q)*ln( I/Isat)
                      |             |  60mV
          
          
                            |  |                 10X increase is 60mV
                            |  |
                    ________|-'__________|\
               Isat -------'|            |/
                            |
          
          
----------------------------------------------------------------------------

                          ____
stacked                  |_   |          _|        
                           ||_|________|| Nch       
                         <-||          ||->      
                         |                |
                         |____            |         
                         |_   |          _|      
                           ||_|________|| Nch    
                         <-||          ||->       
                         |                |
          
----------------------------------------------------------------------------
          
                          ____
super wilso              |_   |          _|        
                           ||_|________|| Nch       
                         <-||          ||->      
                         |                |
                         |           _____|         
                         |_         |    _|               
                           ||_______|__|| Nch    
                         <-||          ||->       
                         |                |
          
----------------------------------------------------------------------------
          
Babanezhad & Gregorian    _____
                         |_    |         _|        
                   |_______||_/|\______|| Nch       
                 Vbias   <-||  |       ||->      
                         |     |          |      
                         |     |          |         
                         |_    |         _|       
                           ||__|_______|| Nch    
                         <-||          ||->       
                         |                |
          
----------------------------------------------------------------------------
                               
 self cascode
                                         _|       
                                    ___|| Nch 10X  -> 50X    
                                    |  ||->      
                                    |     |      
                                    |     |         
                                    |    _|       
                                    |__|| Nch    
                                       ||->       
                                          |