Semiconductor device

Abstract

A semiconductor device having a nonvolatile variable resistor, includes: a resistance value conversion circuit unit configured to convert a resistance value of the nonvolatile variable resistor into a potential or a current and which outputs the converted potential or current; a comparison circuit unit configured to compare the output from the resistance value conversion circuit unit and a potential or current at a node of a portion within the semiconductor device; and a resistance value changing circuit unit configured to change the resistance value of the nonvolatile variable resistor based on the comparison results from the comparison circuit unit.

What is claimed is: 
     
         1 . A semiconductor device having a nonvolatile variable resistor, the device comprising:
 a resistance value conversion circuit unit that is configured to convert a resistance value of the nonvolatile variable resistor into a potential or a current and that outputs the converted potential or current;   a comparison circuit unit configured to compare the output from the resistance value conversion circuit unit with a potential or a current at some nodes within the semiconductor device; and   a resistance value changing circuit unit that is configured to change the resistance value of the nonvolatile variable resistor based on the comparison results from the comparison circuit unit.   
     
     
         2 . The semiconductor device according to  claim 1 , wherein the resistance value is stored in a solid electrolyte. 
     
     
         3 . The semiconductor device according to  claim 1 , wherein an operation mode is provided to output an output from the resistance value conversion circuit unit to the exterior. 
     
     
         4 . The semiconductor device according to  claim 2 , wherein the solid electrolyte has a three-terminal configuration, and its resistance value is changed according to an input of a gate terminal. 
     
     
         5 . A semiconductor device having a nonvolatile variable capacitor, the device comprising:
 a capacitance value conversion circuit unit configured to convert a capacitance value of the nonvolatile variable capacitor into a potential or a current, and to output the converted potential or current;   a comparison circuit unit configured to compare the output from the capacitance value conversion circuit unit and a potential or a current at some nodes within the semiconductor device; and   a capacitance value changing circuit unit configured to change the capacitance value of the nonvolatile variable capacitor based on the comparison results from the comparison circuit unit.   
     
     
         6 . The semiconductor device according to  claim 5 , wherein the capacitance value is stored in a solid electrolyte. 
     
     
         7 . The semiconductor device according to  claim 6 , wherein the solid electrolyte is used as a nonvolatile switching element in a logical circuit unit, and is used as a nonvolatile variable capacitor in an analog circuit unit. 
     
     
         8 . The semiconductor device according to  claim 5 , wherein an operation mode is provided to output an output from the capacitance value conversion circuit unit to the exterior. 
     
     
         9 . The semiconductor device according to  claim 6 , wherein the solid electrolyte has a three-terminal configuration, and its capacitance value is changed according to an input of a gate terminal. 
     
     
         10 . The semiconductor device according to  claim 5 , wherein a potential or a current at a node stored as a capacitance value of the nonvolatile capacitor is used as an initial value of a potential or current at nodes of some circuits of the semiconductor device.