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
![Schematic of a generalized impedance converter described by Temes and LaPatra.[1]](/wiki/File:Generalized_Impedance_Converter-Temes.png)
![Schematic of a generalized impedance converter described by Wait, Huelsman and Korn.[3]: 290](/wiki/File:Generalized_Impedance_Converter-Wait.png)
Applications edit
simulated inductor edit
frequency dependent negative resistor edit
Wait gives the circuit shown to the right as suitable for a grounded FDNR.[3]: 290
gyrator edit
References edit
- ^ a b Temes, Gabor C.; LaPatra, Jack W. (1977), Circuit Synthesis and Design (1st ed.), McGraw-Hill, ISBN 007063489-0
- ^ Chen, Wai-Kai (1995). The Circuits and Filters Handbook. CRC Press. ISBN 0-8493-8341-2.
- ^ 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