Chua's circuit and it's use in hyperchaotic circuit

Abstract

The present invention provides an improved Chua's circuit providing current mode operation, access to all state variables, minimum use of grounded passive elements, and freedom from passive component matching comprising a dual output current conveyer based inductor having one grounded terminal, a capacitor connected across the second terminal of said inductor, a resistor having one terminal connected to the second terminal of said inductor, the second terminal of said resistor connected to one terminal of a second capacitor the other end of which is grounded, and a pair of dual output current conveyers connected together to form a 2-terminal negative resistance having one terminal connected to ground and the second terminal connected to the second terminal of said resistance.

1 . An improved Chua's circuit providing current mode operation, access to all state variables, minimum use of grounded passive elements, and freedom from passive component matching comprising; 
 a multiple output current conveyer based inductor having one grounded terminal,    a capacitor connected across the second terminal of said inductor,    a resistor having one terminal connected to the second terminal of said inductor,    the second terminal of said resistor connected to one terminal of a second capacitor the other end of which is grounded, and    a pair of multiple output current conveyers connected together to form a 2-terminal negative resistance having one terminal connected to ground and the second terminal connected to the second terminal of said resistance.    
   
   
       2 . An improved Chua's circuit as claimed in  claim 1  wherein said multiple output current conveyers are the multiple output (second generation) current conveyer (MO-CC II).  
   
   
       3 . An improved Chua's circuit as claimed in  claim 1  wherein said inductor comprises two multiple output current conveyers having their x terminals grounded through resistors, a capacitor having one terminal grounded and its second terminal connected to the z P1  terminal of the second multiple output current conveyer and in parallel to the y terminal of the first multiple output current conveyer while the y terminal of the second multiple output current conveyers and the Z N1  terminal of the first multiple output current conveyers of are joined together and which acts as one of the terminal of simulated grounded inductance.  
   
   
       4 . An improved Chua's circuit as claimed in  claim 1  wherein said 2-terminal negative resistance circuit comprises two multiple output current conveyers having their x terminals grounded through resistors and their y terminals connected together and to the z P1  terminals of both multiple output current conveyers through two different resistors.  
   
   
       5 . An improved Chua's circuit providing current mode operation, access to all state variables, minimum use of grounded passive elements, and freedom from passive component matching comprising; 
 a dual output current conveyer based inductor having one grounded terminal,    a capacitor connected across the second terminal of said inductor,    a resistor having one terminal connected to the second terminal of said inductor, the second terminal of said resistor connected to one terminal of a second capacitor the other end of which is grounded, and    a pair of dual output current conveyers connected together to form a 2-terminal negative resistance having one terminal connected to ground and the second terminal connected to the second terminal of said resistance.    
   
   
       6 . An improved Chua's circuit as claimed in  claim 6  wherein said dual output current conveyer is a dual output (second generation) current conveyer.  
   
   
       7 . An improved Chua's circuit as claimed in  claim 6  wherein said inductor comprises two dual output current conveyers having their x terminals grounded through resistors, a capacitor having one terminal grounded and its second terminal connected to the z+ terminal of the second dual output current conveyer and in parallel to the y terminal of the first dual output current conveyer while the y terminal of the second dual output current conveyers and the z terminal of the first dual output current conveyers of are joined together and which acts as one of the terminal of simulated grounded inductance.  
   
   
       8 . An improved Chua's circuit as claimed in  claim 1  wherein said 2-terminal negative resistance circuit comprises two dual output current conveyers having their x terminals grounded through resistors and their y terminals connected together and to the z +  terminals of both dual output current conveyers through two different resistors.  
   
   
       9 . An improved Chua's circuit for use in a hyperchaotic circuit as claimed in claims  1  comprising a plurality of said Chua's circuit symmetrically coupled together to enable monolithic implementation of hyperchaotic circuit.  
   
   
       10 . A method for improving a Chua's circuit to provide current mode operation, access to all state variables, minimum use of grounded passive elements, and freedom from passive component matching comprising the steps of: 
 simulating a grounded inductor using a multiple output current conveyer,    connecting a capacitor connected across the second terminal of said inductor,    connecting one terminal of a resistor to the second terminal of said inductor,    connecting the second terminal of said resistor to one terminal of a second capacitor the other end of which is grounded, and    providing a 2-terminal negative resistance device using a pair of multiple output current conveyers.