Halil Alpaslan

Inverting CFOA Based Lossless and Lossy Grounded Inductor Simulators

In this paper, two lossy grounded inductor simulators (GISs) and one lossless GIS including an inverting type current feedback operational amplifier (CFOA

A CMOS CURRENT RECTIFIER CONFIGURATION SUITABLE FOR INTEGRATION

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MULTI-OUTPUT CURRENT FOLLOWER BASED CURRENT-MODE UNIVERSAL FILTER EMPLOYING ONLY GROUNDED CAPACITORS

-), two resistors and a capacitor are proposed. All the proposed GISs can be easily obtained with commercial available active devices such as AD844s. Also, they do not need any critical passive component matching conditions. Both of the proposed lossy GISs employ a grounded capacitor, whereas the lossless one has a floating capacitor. In order to show performance of the proposed GISs, a number of simulation and experimental test results are given.

Modified Current Follower Based Immittance Function Simulators

In this paper, a grounded voltage controlled resistor (GVCR) employing eight CMOS transistors, all of which are operating in saturation region, is proposed. The developed GVCR has two identical control voltages in opposite sign for electronically changing the resistance value. The linearity of the current-voltage (I - V) characteristic of the proposed GVCR is not affected by the body effect of the transistors. Computer simulation results with SPICE program are given to exhibit the performance and effectiveness of the introduced GVCR.

A modified VDVTA and its applications to floating simulators and a quadrature oscillator

In this paper, a CMOS-based one input-two output current-mode (CM) circuit structure for providing full-wave rectification and half-wave rectifications to clarify the theory is proposed. The suggested configuration has many important advantages such as dissipating very less power, employing reduced number of CMOS transistors, having high output impedance currents and without requiring any additional bias currents and voltages. In order to exhibit performance and effectiveness of the proposed topology, SPICE simulation results are given.

Grounded capacitor-based new floating inductor simulators and a stability test

In this paper, novel low and high frequency performance improvement techniques are proposed. High frequency performance improvement method is based on the single pole effect reduction/completely elimination by creating a corresponding zero while a low one is based on reduction/elimination of Z terminal parasitic resistors. Therefore, two grounded capacitance multipliers, three grounded inductor simulators, a floating inductor and a voltage-mode (VM) universal filter using second-generation current conveyors (CCIIs) are used to explain the developed methods. One of the grounded inductor simulators, floating simulated inductor and VM biquad are novel. Further, both of the new simulated inductors use a grounded capacitor; accordingly, they are suitable for IC fabrication. However, all the proposed circuits need a single matching condition. A number of simulations through PSPICE program and experimental tests are accomplished to demonstrate the workability, performance and effectiveness.

Single voltage controlled CMOS grounded resistors and their application to video filter

In this paper, a new two-input three-output second-order universal filter is proposed. Two multi-output voltage controlled current followers (MO-VCCFs) and two capacitors are used in the proposed filter. The proposed filter does not have external passive resistors. It has high output impedances yielding easy cascadability. It has the property of electronic tunability. It does not need any critical passive component matching conditions. Also, it is composed of only grounded capacitors; accordingly, it is suitable for integration. Theoretical knowledge is supported via SPICE simulations.

New grounded inductor simulator using unity gain cells

ABSTRACT 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 +L parallel with +R and the second proposed one can realise −L parallel with −R. The third proposed structure can provide +L series with +R and the fourth proposed one can realise −L series 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.