Modified current follower-based immittance function simulators.

In this paper, four immittance function simulators consisting of a single modified current follower with single Z− terminal and a minimum number of passive components are proposed. The first proposed circuit can provide +Lparallel with +Rand the second proposed one can realise −Lparallel with −R. The third proposed structure can provide +Lseries with +Rand the fourth proposed one can realise −Lseries with −R. However, all the proposed immittance function simulators need a single resistive matching constraint. Parasitic impedance effects on all the proposed immittance function simulators are investigated. A second-order current-mode (CM) high-pass filter derived from the first proposed immittance function simulator is given as an application example. Also, a second-order CM low-pass filter derived from the third proposed immittance function simulator is given as an application example. A number of simulation results based on SPICE programme and an experimental test result are given to verify the theory. [ABSTRACT FROM AUTHOR]