Resistance hybrid, and voltage detection and constant voltage generating circuits incorporating such resistance hybrid

Abstract

A resistance hybrid is disclosed including m+1 unit resistors connected in series, to further be connected in series between two resistance elements, one Rbottom and the other Rtop. Each unit resistor SBn includes an error correction resistance element Rldn and a set resistance element RTn connected in series, and further connected in parallel to a fuse RLn. In addition, the error correction resistance element Rldn is formed such that the combined resistance of the fuse RLn, set resistance element RTn, and error correction resistance element Rldn, is equal to the resistance value of the error correction resistance element Rldn. The value of resistance of the unit resistor SBn after the disconnection increases by the resistance value of set resistance element RTn, to thereby obviating the error possibly caused by the disconnection, which is originated from the resistance value of the fuse RLn. The resistance error caused by the disconnection can be reduced in the present resistance hybrid without appreciable increase in the resistance area, which is particularly advantageous in use for analogue circuits in various semiconductor integrated circuits such as voltage detection and constant voltage generating circuits.

1 . A resistance hybrid comprising: 
 a set resistance element;    an error correction resistance element; and    a disconnectable exclusive resistance element; and    wherein 
 a resistance value of said resistance hybrid is adjusted by disconnecting said exclusive resistance element for disconnection; and  
 said set resistance element and said error correction resistance element being connected in series to form a series resistance element, said series resistance element and said disconnectable exclusive resistance element being connected in parallel.  
   
   
   
       2 .- 22 . (canceled)  
   
   
       23 . The resistance hybrid of claims  1 , wherein a resistance of said error correction resistance element is equal to a combined resistance of said set resistance element, said error correction resistance element, and said disconnectable exclusive resistance element, prior to disconnection of said disconnectable exclusive resistance element.  
   
   
       24 . The resistance hybrid according to  claim 1 , wherein a plurality of unit resistors, each consisting of said set resistance element, said error correction resistance element, and said disconnectable exclusive resistance element, are connected either in series or in parallel.  
   
   
       25 . The resistance hybrid according to  claim 1 , wherein said disconnectable exclusive resistance element included in each of said plurality of unit resistors is formed of polysilicon patterns, each of said patterns being formed of a same material, equal in size and alignment direction.  
   
   
       26 . The resistance hybrid according to  claim 1 , wherein said error correction resistance element included in each of said plurality of unit resistors is formed of polysilicon patterns, each of said patterns being formed of a same material, equal in width and alignment direction.  
   
   
       27 . A resistance hybrid comprising: 
 a first resistance element;    a second resistance element being connected in series with said first resistance element; and    a disconnectable exclusive resistance element being connected in parallel with said first and second resistance elements,    wherein said resistance hybrid functions as a voltage divider.    
   
   
       28 . The resistance hybrid according to  claim 27 , wherein said resistance of said second resistance element is equal to a combined resistance of said first resistance element, said second resistance element, and said disconnectable exclusive resistance element, prior to disconnection of said disconnectable exclusive resistance element.  
   
   
       29 . The resistance hybrid according to  claim 27 , wherein a plurality of unit resistors, each consisting of said first resistance element, said second resistance element, and said disconnectable exclusive resistance element, are connected either in series or in parallel.  
   
   
       30 . The resistance hybrid according to  claim 29 , wherein said second resistance element included in each of said plurality of unit resistors is formed of polysilicon patterns, each of said patterns being formed of a same material, equal in width and alignment direction.  
   
   
       31 . The resistance hybrid according to  claim 29 , wherein said disconnectable exclusive resistance element included in each of said plurality of unit resistors is formed of polysilicon patters, each of said patterns being formed of a same material, equal in size and alignment direction.  
   
   
       32 . The resistance hybrid according to  claim 29 , wherein said resistance hybrid functions as a voltage divider in a constant voltage generating circuit or a voltage detection circuit.  
   
   
       33 . The resistance hybrid according to  claim 29 , wherein a resistance value of said resistance hybrid is adjusted by disconnecting said exclusive resistance element for disconnection.