Design of General Voltage- or Current-Controlled Resistive Elements and their Applications to the Synthesis of Nonlinear Networks

New structures are proposed for the realization of voltage- or current-controlled resistors and conductors. The new devices have improved sensitivity parameters if compared with previously reported modules. Also an original contribution is the design of ungrounded elements which enlarge the usefulness of these structures. Applications of these elements to the synthesis of resistive nonlinear networks are studied. Experimental realizations are given and are in agreement with the theoretid results.