User:Constant314/Generalized Impedance Converter

A generalized impedance converter or GIC is a sub-circuit that can be used to implement an active impedance. Its applications include implementations of simulated inductors, gyrators, frequency dependent negative resistors, second order active filters and second order active filters with transmission zeroes. A variety of implementations exist. Temes describes four implementations, but notes that the different implementations have different stability properties.[1]: 274–276  Chen[2]: 2400  and Wait[3]: 290  describe circuits based on state variable filters.



Schematic

edit

Applications

edit

simulated inductor

edit

frequency dependent negative resistor

edit
 
Schematic of a frequency dependent negative resistor.

Wait gives the circuit shown to the right as suitable for a grounded FDNR.[3]: 290 

gyrator

edit
 
Gyrator schematic labelled
 
Schematic of a grounded gyrator described by Temes and LaPatra.

References

edit
  1. ^ a b Temes, Gabor C.; LaPatra, Jack W. (1977), Circuit Synthesis and Design (1st ed.), McGraw-Hill, ISBN 007063489-0
  2. ^ Chen, Wai-Kai (1995). The Circuits and Filters Handbook. CRC Press. ISBN 0-8493-8341-2.
  3. ^ a b c Wait, John V.; Huelsman, Lawrence P.; Korn, Granino A. (1992), Introduction to Operational Amplifier Theory and Applications (2nd ed.), McGraw-Hill, ISBN 007067770-0