Fırat Kaçar

Istanbul University-Cerrahpaşa

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Abdullah Yeşil

Bandırma Onyedi Eylül University

Hakan Kuntman

Istanbul Technical University

Yunus Babacan

Erzincan University

Mustafa Konal

Namık Kemal University

Cengiz Polat Uzunoğlu

Technical University of Sofia

EÖ

Emre Özer

Istanbul University-Cerrahpaşa

Adil Alahmad

Istanbul University-Cerrahpaşa

Muhammed Emin Başak

Yıldız Technical University

Ayten Kuntman

Istanbul University-Cerrahpaşa

Melih Yıldırım

Scientific and Technological Research Council of Turkey

Cooperative Institutions

Istanbul University

Istanbul University-Cerrahpaşa

Istanbul Technical University

Saveetha University

SRM Institute of Science and Technology

Karunya University

Koneru Lakshmaiah Education Foundation

Fatih University Medical Faculty Hospital

Temper (United States)

Indian Institute of Technology Madras

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Band-pass filter with high quality factor based on current differencing transconductance amplifier and current amplifier

AEU - International Journal of Electronics and Communications (2017)

Abdullah Yeşil Fırat Kaçar

Operational transconductance amplifier

Transconductance

Output impedance

Current-feedback operational amplifier

All-pass filter

10.1016/j.aeue.2017.03.007

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Citations (16)

Extended Bandwidth Method on Symmetrical Operational Transconductance Amplifier and Filter Application

Informacije MIDEM - Journal of Microelectronics Electronic Components and Materials (2021)

Mustafa Konal Fırat Kaçar

In this paper, a symmetrical operational transconductance amplifier (OTA) circuit with extended bandwidth using resistive compensation technique is proposed. Into the all current mirrors of the symmetrical OTA circuit, this technique is applied. A passive resistor is connected between the gate and the drain of each primary transistor of the current mirrors in the symmetrical OTA structure. In addition, filter structures are realized in order to analyze the performance of the symmetrical OTA with extended bandwidth. Thus, the advantage of using resistive compensation technique is demonstrated. The symmetrical OTA with extended bandwidth and the filters are simulated with LTSPICE by using TSMC 0.18 μm CMOS process parameters.

Operational transconductance amplifier

Transconductance

Resistive touchscreen

10.33180/infmidem2021.201

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Citations (0)

Noise Minimization in CMOS Current Mode Circuits That Employ Differential Input Stage

Advances in Electrical and Computer Engineering (2016)

Abdullah Yeşil Deniz Özenli Emre Arslan Fırat Kaçar

In this paper, a new noise minimization approach is proposed for CMOS current-mode (CM) circuits whose input stage is differential.This is realized by focusing on input stage and some output stage transistors' transconductance.Effect of output stage over the noise model depends on output stage's operation.This minimization is introduced to designers as a trade-off between design parameters and noise reduction.Analyses are presented in basis of Differential Difference Current Conveyor (DDCC) for simplicity.To reinforce theoretical concept, simulation results are given both in schematic and layout based.Moreover, a DDCC filter application, which has single input and four outputs is presented to verify theoretical minimization approach.After minimization, it is shown that significant noise reduction is obtained up to 50%.In addition, Monte Carlo analysis is given in order to investigate process variations and temperature effects on measured input referred noise.

Minification

10.4316/aece.2016.02003

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Citations (4)

Detection of printed circuit board faults with FPGA-based real-time image processing

Iran Journal of Computer Science (2023)

Merve Nilay Aydin Fırat Kaçar

Video Graphics Array

Surface-mount technology

10.1007/s42044-023-00149-6

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Citations (0)

An Electronically Controllable Voltage-Mode MOSFET-Only Single-Input Dual-Output Filter

Journal of Circuits Systems and Computers (2019)

Abdullah Yeşil Deniz Özenli Emre Arslan Fırat Kaçar

A new design of voltage mode (VM), single-input dual-output MOSFET-only filter which has electronic tunability property is presented without using passive circuit elements like resistors and capacitors. The filter topology is able to realize low-pass (LP) and band-pass (BP) filter functions with using the same circuit configuration. The proposed filter is laid-out in the Cadence environment using 0.18-[Formula: see text]m TSMC CMOS technology parameters. The layout area is only 344.4[Formula: see text][Formula: see text]m 2 and the power consumption is about 170[Formula: see text][Formula: see text]W. Furthermore, variations in the center frequency of the BP filter are presented performing Monte Carlo (MC) analysis to reinforce the filter results. Also, the noise performance of the proposed filter is investigated and it is shown that the theoretical and simulation results are in very good agreement.

Voltage-controlled filter

Electronic filter topology

All-pass filter

Constant k filter

Cadence

Butterworth filter

10.1142/s0218126619502220

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Citations (0)

Electronically controllable neuristor based logic gates and their applications

AEU - International Journal of Electronics and Communications (2021)

Ömer Faruk Tozlu Fırat Kaçar Yunus Babacan

AND-OR-Invert

NOR gate

Combinational logic

Sequential logic

OR gate

10.1016/j.aeue.2021.153834

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Citations (3)

Chaotic circuit with OTA based memristor on image cryptology

AEU - International Journal of Electronics and Communications (2020)

Melih Yıldırım Fırat Kaçar

Memristor

10.1016/j.aeue.2020.153490

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Citations (23)

Neuron Circuit Based on CCII‐

Yunus Babacan Abdullah Yeşil Mustafa Konal Fırat Kaçar

Current-mode active components provide linearity, wider bandwidth, and low power dissipation. Current conveyors which are a type of current mode active elements find large application area in circuit designs. In this paper, we present a novel neuron circuit based on a negative-type second-generation current conveyor (CCII-). The circuit consists of only one CCII- and five MOS transistors and capable of generating fast-spiking firing behavior. Two transistors of them are used as capacitors in proposed neuron circuit. All simulation results are obtained as expected. The presented only-MOS based neuron circuit is compatible with VLSI systems.

10.1109/electronics.2018.8443642

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Citations (1)

Design of quadrature oscillator using Current Differencing (CDTA) Transconductance Amplifier

International Conference on Electrical, Electronic and Computer Engineering (2010)

Fırat Kaçar Hakan Kuntman

A CDTA (Current Differencing Transconductance Amplifier)-based quadrature oscillator circuit is proposed, employing two CDTAs and two capacitors. All capacitors are grounded. No oscillation condition is needed for the proposed oscillator circuit. The output terminals of the oscillator circuit exhibit high output impedance values, high-end features without any need to a buffer circuit for proper drive of the load. PSPICE simulation results of the proposed circuit using TSMC 0.35µ CMOS process model are included to verify the expected values.

Transconductance

Operational transconductance amplifier

Output impedance

Pierce oscillator

Source

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Citations (0)

CFOA-Based Lossless and Lossy Inductance Simulators

DOAJ (DOAJ: Directory of Open Access Journals) (2011)

Fırat Kaçar Hakan Kuntman

Inductance simulator is a useful component in the circuit synthesis theory especially for analog signal processing applications such as filter, chaotic oscillator design, analog phase shifters and cancellation of parasitic element. In this study, new four inductance simulator topologies employing a single current feedback operational amplifier are presented. The presented topologies require few passive components. The first topology is intended for negative inductance simulation, the second topology is for lossy series inductance, the third one is for negative lossy parallel inductance (-R) (-L) and the fourth topology is for negative parallel (-R) (-L) (-C) simulation. The per- formance of the proposed CFOA based inductance simula- tors is demonstrated on both a second-order low-pass filter and inductance cancellation circuit. PSPICE simulations are given to verify the theoretical analysis.

Lossy compression

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Citations (66)