Herman Sedef

Realization of nth-order current transfer function using current-differencing buffered amplifiers

The authors propose two new configurations suitable for high-order filter response. It is possible to realize the most general nth-order current-mode transfer function using these configurations, involving a single or two current-differencing buffered amplifiers (CDBAs) and the RC:–RC decomposition technique. With the proposed configurations, the number of active elements is reduced to one or two, which is a significant reduction in comparision with the previously reported methods.

A New Floating Inductor Circuit Using Differential Voltage Current Conveyors

Ein neuer Schaltkreis f r hochliegende Induktivit ten unter Verwendung von Strom bertragern mit differentiellem Spannungseingang Abstract A new floating inductor circuit is proposed using two differential voltage current conveyors and a minimum number of passive elements. Since passive elements are all grounded, this circuit is suitable for fully integrated circuit design. Moreover it does not require any element matching condition. It has a good sensitivity performance due to tracking errors. The proposed inductor circuit can be controlled through with grounded resistors.

Current and voltage transfer function filters using a single active device

In this study, current and voltage transfer function filters using single active component, namely, current backward transconductance amplifier (CBTA) are presented. The proposed structures are a single-input three outputs (SITO) current-transfer function filter, a single-input four-output (SIFO) voltage transfer function filter and three-input single-output (TISO) voltage transfer function filter. The proposed filters have low active and passive sensitivities and use canonical number of electronics components. The validity of the proposed circuits is demonstrated by PSPICE simulations and experimental results. Operation range of the CBTA and its parasitic effects are also discussed.

Current-controllable fully-integrated inductor simulator using CCCIIs

A novel current controllable floating or grounded inductor simulator circuit with minimum elements is proposed. The circuit uses two dual output- second generation current controlled conveyors (DO-CCCIIs) with parasitic resistance at terminal X and one grounded capacitor externally connected. Proposed circuit is suitable for fully integrated circuit design. Analysis and simulation results are included.

Electronically tunable sinusoidal oscillator circuit with current and voltage outputs

A new circuit configuration for the realisation of an electronically tunable sinusoidal oscillator is presented. The proposed circuit uses only one current backward transconductance amplifier (CBTA), two grounded capacitors and one resistor. Using current controlled CBTA (CC-CBTA) instead of the CBTA, the resistor can be completely removed. It has also current-mode (CM) and voltage-mode (VM) outputs, simultaneously. The workability of the proposed structure has been demonstrated by both simulation and experimental results.

AN ELECTRONICALLY TUNABLE OSCILLATOR USING A SINGLE ACTIVE DEVICE AND TWO CAPACITORS

A novel resistorless oscillator is presented. The proposed structure enjoys electronic tunability property with minimum number of active and passive components. This oscillator uses a current-mode (CM) active device and has properties of current mode circuits. The validity of the proposed circuit is verified by experimental results.

On the Realisation of Voltage-Mode Filters Using CDBA

Abstract The authors propose two new configurations suitable for voltage-mode filter responses. It is possible to realise the most general nth-order and second-order voltage-mode transfer functions using these configurations. The first configuration uses a single current differencing buffered amplifier (CDBA) and RC:-RC decomposition technique to realise high order response. With this configuration the number of active elements is reduced to one compared to the previously reported method. The second configuration uses three CDBAs at most and statespace technique to realise second-order responses. The proposed filters seem to be versatile and suitable for the analogue signal processing. Independent parameters in the second configuration give flexibility to design. Proper choice of these parameters optimises the sensitivities.

A New Floating Memristance Simulator Circuit Based on Second Generation Current Conveyor

In this paper, a new floating analog memristance simulator circuit based on second generation current conveyors and passive elements is proposed. Theoretical derivations are presented which decribe the circuit characteristics. The hardware of proposed simulator circuit is built using commercially available components. Theoretical derivations are validated with PSPICE simulation and experimental results. Performance of circuit was tested with simple example circuits. All results show that proposed simulator circuit provides frequency dependent pinched hysteresis loop and nonvolatility features. Exciting frequency, minimum and maximum memristance values and memristance range can be adjustable with simple passive element values. Simulator circuit has a frequency range of 1Hz to 40kHz.

Simulation of resistively terminated LC ladder filters using a new basic cell involving current conveyors

Abstract A simple, but general, synthesis method is given for the simulation of resistively terminated LC ladder circuits. The method is based on a new basic cell (BC) introduced in this work. The proposed method converts resistively terminated LC ladder circuits into inductorless active circuits involving only second-generation current conveyors (CCII±), grounded resistors and grounded capacitors. Hence it is suitable for fully integrated circuit design.

Current-mode SITO filter using a single active component

In this paper, current-mode filter using new active component, namely; current backward transconductance amplifier (CBTA) is presented. The proposed filter uses two resistors, two capacitors and only one CBTA. It has low active and passive sensitivities. The validity of the proposed circuit is demonstrated by PSPICE simulations and experimental results.