scholarly journals Current Conveyor Based Window Comparator Circuits

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Sudhanshu Maheshwari
Keyword(s):  
Automatic Control ◽  
Operational Amplifier ◽  
Active Element ◽  
Current Mode ◽  
Current Conveyor ◽  
Control Applications ◽  
Window Comparator ◽  
Simulation Results

This paper introduces a new window comparator circuit utilizing a new current conveyor and two diodes, operable at ±1.25 V and capable of accurately detecting the voltage windows. Another modified circuit with distinct binary levels suited for automatic control applications is also suggested. Exhaustive simulation results showing detection of windows, as small as 50 mV and as high as 1 V, are included. Comparisons are further drawn with the traditional operational amplifier based circuit and the new circuit is found to benefit from the use of current-mode active element, namely, Extra-X Current Controlled Current Conveyor. The proposed theory is well supported through simulation results.

Some Analog Filters of Reduced Complexity with Shelving and Multifunctional Characteristics

2018 ◽  
Vol 27 (10) ◽  
pp. 1850150 ◽  
Author(s):  
Sudhanshu Maheshwari
Keyword(s):  
Power Supply ◽  
Active Element ◽  
Current Conveyor ◽  
Analog Filters ◽  
First Order ◽  
Voltage Mode ◽  
Experimental Support ◽  
Reduced Complexity ◽  
Simulation Results ◽  
The One

This paper presents first-order voltage-mode filters using a single current conveyor with an additional X-stage, and passive elements. The new circuits have multifunction capability, and also realize low-shelf, high-shelf and band-shelf functions. The study is carried out on the effects of non-idealities, parasitic elements, and loading on the performance of proposed circuits. Active and passive sensitivities are also analyzed. The active element, extra-X current conveyor used for designing new circuits is simpler than most of the one active element and two passive elements’ based circuits. Detailed comparisons are carried out with relevant available works, and the new circuits are found to be more compact and exhibit higher frequency performances. The simulation results using 0.25[Formula: see text][Formula: see text]m CMOS parameters with [Formula: see text]1.25[Formula: see text]V power-supply are shown to verify the proposed circuits. The proposed circuits are also verified through simulations. Experimental support is given using AD-844 ICs to strengthen the validity of the proposed circuits.

CMOS Implementation of Current Differencing Operational Amplifier and Its Notch Filter Application

2019 ◽  
Vol 29 (08) ◽  
pp. 2050132
Author(s):  
Muhammed Emin Başak
Keyword(s):  
Operational Amplifier ◽  
Process Model ◽  
Active Element ◽  
Harmonic Distortion ◽  
Notch Filter ◽  
Current Mode ◽  
Monte Carlo Analysis ◽  
Cmos Process ◽  
Band Pass Filter ◽  
Pass Filter

Active elements are fundamental circuits for a wide scope of scientific and industrial processes. Many researchers have examined active devices to implement filters, oscillators, rectifiers, and converters. This paper presents the current differencing operational amplifier (CDOA) as an active element, firstly implemented with CMOS transistors. The input part of this circuit is a current differencing unit and the conventional operational amplifier (Op-Amp) pursues it. A new realization of a notch filter consists of CDOA is suggested. Voltage-mode band-pass filter and current-mode notch filter are presented as a different filter applications. Simulation results using TSMC 0.18-[Formula: see text]m CMOS process model are used to verify the theoretical analyses. The sensitivity, noise, total harmonic distortion (THD) and the Monte Carlo analysis have been performed to demonstrate the effectiveness of the proposed active element and notch filter.

Modified current differencing transconductance amplifier – new versatile active element

2012 ◽  
Vol 60 (4) ◽  
pp. 739-750 ◽  
Author(s):  
A. Malcher
Keyword(s):  
Signal Processing ◽  
Active Element ◽  
Current Mode ◽  
Input Resistance ◽  
Analog Signal ◽  
Output Stage ◽  
Spice Simulation ◽  
Transconductance Amplifier ◽  
Simulation Results ◽  
Current Differencing Transconductance Amplifier

Abstract This paper introduces a new current mode component called Modified Current Differencing Transconductance Amplifier (MCDTA). Important parameters of the circuit i.e. input resistance, z terminal resistance and transconductance of the output stage can be tuned electrically. The circuit can be implemented in linear and non-linear analog signal processing. The paper presents an example of the MCDTA application - a complete quadrature oscillator with the amplitude regulation. The functionality of the example circuit and its tuning capability were proved by the SPICE simulation results.

scholarly journals Current Controlled Current Differencing Buffered Amplifier: Implementation and Applications

2004 ◽  
Vol 27 (4) ◽  
pp. 219-227 ◽  
Author(s):  
Sudhanshu Maheshwari ◽  
Iqbal A. Khan
Keyword(s):  
Active Element ◽  
Current Mode ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Current Range ◽  
Current Input ◽  
Band Pass ◽  
Simulation Results ◽  
Definition Of ◽  
Harmonic Distortions

A new four terminal current-controlled active element is introduced, where parasitic resistances at two current input ports are controlled leading to the definition of current-controlled current differencing buffered amplifier. Bipolar implementation and as application current-mode band-pass filter circuits are proposed. Simulation results using real device parameters are included, which show device bandwidth of 35 MHz, low total harmonic distortions, and tuning over a wide current range.

ON THE TRANSFORMATION OF GROUNDED INDUCTORS TO FLOATING INDUCTORS USING OFA AND FCCII

2011 ◽  
Vol 20 (02) ◽  
pp. 243-262 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Operational Amplifier ◽  
Current Conveyor ◽  
Operational Transconductance Amplifier ◽  
Transconductance Amplifier ◽  
Simulation Results

It is well known that a floating inductor circuit is realized from a grounded inductor circuit by replacing the operational amplifier by a floating operational transconductance amplifier. This idea is extended to transform current conveyor grounded inductors to floating inductors by replacing the current conveyor by the recently introduced floating current conveyor. Several examples are considered and simulation results are given to support the theory. Although the paper is partially a review in nature it includes several new realizations of floating inductors.

HISTORY AND PROGRESS OF THE TOW–THOMAS BIQUADRATIC FILTER PART II: OTRA, CCII, AND DVCC REALIZATIONS

2008 ◽  
Vol 17 (05) ◽  
pp. 797-826 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Power Dissipation ◽  
Harmonic Distortion ◽  
Current Mode ◽  
Current Conveyor ◽  
Total Power ◽  
Feature Size ◽  
Biquadratic Filter ◽  
Simulation Results ◽  
Differential Voltage Current Conveyor ◽  
Very High

The realization of the Tow–Thomas (TT) circuit using the Operational Transresistance Amplifier (OTRA) is reviewed. The circuit employs two OTRA, and all passive elements are floating as the original Tow–Thomas circuit. The Current Conveyor (CCII) TT circuits are reviewed next. The progress in the realization of the TT circuit using CCII is demonstrated clearly by summarizing eight different circuits. One of the circuits has the advantage of very high input impedance using all grounded resistors and capacitors. The Differential Voltage Current Conveyor (DVCC) as the active building block in realizing the TT circuit is also considered. Finally, current mode TT circuits using balanced output CCII are summarized. Top Spice (level 49), simulation results using technology SCN 05 feature size 0.5 μm from MOSIS vendor: AGILENT are included to demonstrate the magnitude and phase frequency response of the TT circuits. Additional simulation results for the total power dissipation, total harmonic distortion, intermodulation IM3, input and output referred noise spectral densities are also included for comparison purposes.

BODE-TYPE EQUALIZERS USING CURRENT CONVEYORS

2009 ◽  
Vol 18 (03) ◽  
pp. 433-442 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Operational Amplifier ◽  
Current Mode ◽  
Current Conveyors ◽  
Spice Simulation ◽  
Voltage Mode ◽  
Type Variable ◽  
Simulation Results

New voltage mode and current mode active RC Bode-type variable equalizers using current conveyors are introduced. The proposed equalizers can operate at much higher frequencies than the classical operational amplifier-based variable equalizers. Spice simulation results are included to confirm the practicality of the proposed circuits.

scholarly journals Novel First-Order Current-Mode All-Pass Sections Using CCIII

2004 ◽  
Vol 27 (2) ◽  
pp. 111-117 ◽  
Author(s):  
Sudhanshu Maheshwari ◽  
Iqbal A. Khan
Keyword(s):  
Frequency Response ◽  
Transient Response ◽  
Current Mode ◽  
Current Conveyor ◽  
Third Generation ◽  
Spice Simulation ◽  
Passive Components ◽  
First Order ◽  
Simulation Results

Two new configurations realizing canonical first-order current-mode all-pass sections (APSs) using a single third generation current conveyor (CCIII) are given. Using each configuration, two types of first-order all-pass filters can be derived giving rise to four distinct circuits for APS, three of which are novel. Each APS employs only a single CCIII and a minimum of passive components: one resistor and one capacitor. The circuits are suited for MOS implementation. The SPICE simulation results for frequency response as well as transient response are incorporated to verify the theory.

scholarly journals Tiso Adjustable Filter with Controllable Controlled–Gain Voltage Differencing Current Conveyor

2014 ◽  
Vol 65 (3) ◽  
pp. 137-143 ◽  
Author(s):  
Jan Jerabek ◽  
Roman Sotner ◽  
Kamil Vrba
Keyword(s):  
Quality Factor ◽  
Active Element ◽  
Current Mode ◽  
Cmos Technology ◽  
Current Conveyor ◽  
Single Output ◽  
Present Solution

Abstract The main aim of this paper is to present solution of triple-input single-output (TISO) filter with independently adjustable pole frequency, quality factor, bandwidth and also gain. Filter is universal, operates in current mode and includes only one active element - the so-called Controlled-Gain Voltage Differencing Current Conveyor (CG-VDCC) with two controllable parameters: transconductance (gm) and gain of output currents (BX ). Implementation of CG-VDCC element in 0.18 μm CMOS technology is also included and this model is used in proposed filter simulations.

scholarly journals Single DD-DXCCII based quadrature oscillator with simultaneous current and voltage outputs

2016 ◽  
Vol 19 (2) ◽  
pp. 94 ◽  
Author(s):  
B. Chaturvedi ◽  
J. Mohan
Keyword(s):  
Sensitivity Analysis ◽  
Process Parameters ◽  
Second Generation ◽  
Active Element ◽  
Current Conveyor ◽  
Cmos Process ◽  
Quadrature Oscillator ◽  
Condition Of Oscillation ◽  
Simulation Results

In this paper, a versatile quadrature oscillator using single Differential Difference Second Generation Dual-X Current Conveyor (DD-DXCCII) as an active element, two grounded capacitors and three grounded resistors is presented. The proposed oscillator provides two current outputs and three voltage outputs in quadrature relationship simultaneously so named as versatile quadrature oscillator. The proposed versatile quadrature oscillator exhibits the feature of orthogonal control over the frequency of oscillation and condition of oscillation. Effects of non-idealities along with sensitivity analysis are also analyzed. The proposed circuit has low active and passive sensitivities. Parasitic study is further explored. The simulation results with 0.18μm CMOS process parameters using PSPICE are also given. Possible realization of proposed oscillator using AD-844 and LM13600 along with some simulation results are also given for completeness sake.

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