scholarly journals Voltage mode electronically tunable full-wave rectifier

2017 ◽  
Vol 68 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Predrag B. Petrović ◽  
Milan Vesković ◽  
Slobodan Đukić
Keyword(s):  
Signal Processing ◽  
Power Consumption ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Current Conveyor ◽  
Output Current ◽  
Zero Crossing ◽  
Full Wave ◽  
Voltage Signal ◽  
Electronically Tunable

Abstract The paper presents a new realization of bipolar full-wave rectifier of input sinusoidal signals, employing one MO-CCCII (multiple output current controlled current conveyor), a zero-crossing detector (ZCD), and one resistor connected to fixed potential. The circuit provides the operating frequency up to 10 MHz with increased linearity and precision in processing of input voltage signal, with a very low harmonic distortion. The errors related to the signal processing and errors bound were investigated and provided in the paper. The PSpice simulations are depicted and agree well with the theoretical anticipation. The maximum power consumption of the converter is approximately 2.83 mW, at ±1.2 V supply voltages.

MIXED MODE UNIVERSAL FILTER

2013 ◽  
Vol 22 (01) ◽  
pp. 1250064 ◽  
Author(s):  
NEETA PANDEY ◽  
SAJAL K. PAUL
Keyword(s):  
Mixed Mode ◽  
Cmos Technology ◽  
Output Impedance ◽  
Universal Filter ◽  
Output Current ◽  
Voltage Signal ◽  
Low Pass ◽  
Band Pass ◽  
Electronically Tunable ◽  
High Pass

The configuration with electronic tunable characteristics that can work in mixed mode may be useful from IC realization viewpoint and application adaptability. This paper proposes an electronically tunable mixed mode universal filter based on multiple output current controlled current conveyor (MOCCCII) and this single topology without any alteration can be used in all four modes i.e., voltage (VM), current (CM), transimpedance (TIM) and transadmittance (TAM). The architecture uses four MOCCCIIs and two grounded capacitors; and can realize universal filter functions — low pass (LP), band pass (BP), high pass (HP), notch (NF) and all pass (AP) for all four modes. Moreover the input impedance is high and output impedance is low for voltage signal and vice-versa for current signal, hence the proposed topology is suitable for cascading for all four modes. The workability of the proposed circuit has been verified via SPICE simulations using AMS 0.35 μm CMOS technology.

scholarly journals Electronically Tunable TISO Voltage-Mode Universal Filter Using Two LT1228s

2021 ◽  
Vol 12 (1) ◽  
pp. 62-74
Author(s):  
May Phu Pwint Wai ◽  
Winai Jaikla ◽  
Surapong Siripongdee ◽  
Amornchai Chaichana ◽  
Peerawut Suwanjan
Keyword(s):  
Integrated Circuits ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Angular Frequency ◽  
Pass Band ◽  
Universal Filter ◽  
Voltage Mode ◽  
Single Output ◽  
Low Pass ◽  
Electronically Tunable

This study aims to design an electronically tunable voltage-mode (VM) universal filter utilizing commercially available LT1228 integrated circuits (ICs) with three-input and single-output (TISO) configuration. With the procedure based on two integrator loop filtering structures, the proposed filter consists of two LT1228s, four resistors, and two grounded capacitors. It realizes five filter output responses: low-pass, all-pass, band-reject, band-pass, and high-pass functions. By selecting input voltage signals, each output responses can be achieved without changing the circuit architecture. The natural angular frequency can be controlled electronically. The input voltage nodes Vin1 and Vin3 possess high impedance. The output node has low impedance, so it can be cascaded to other circuits. The performance of the proposed filter is corroborated by PSpice simulation and hardware implementation which support the theoretical assumptions. The result shows that the range of total harmonic distortion (THD) is lower than 1%, and that the higher the temperature is, the lower the natural angular frequency is.

A NOVEL, COMPENSATED, TUNABLE CURRENT CONVEYOR

1992 ◽  
Vol 02 (04) ◽  
pp. 397-401 ◽  
Author(s):  
C.A. KARYBAKAS ◽  
S. SISKOS ◽  
TH. L. LAOPOULOS
Keyword(s):  
Temperature Compensation ◽  
Input Voltage ◽  
Current Conveyor ◽  
Current Gain ◽  
Linear Operation ◽  
Simulation Results ◽  
Electronically Tunable ◽  
Circuit Configuration

A novel circuit configuration realizing an electronically tunable CCII which is based on OTAs, is presented. Simulation results confirm certain remarkable features of this circuit; linear operation for various input voltage values, linear tuning of current gain over a three decades range, and very good temperature compensation.

Single-Stage LED Driver with Dimming and Universal Input Voltage Capability

2020 ◽  
Author(s):  
Giancarlo Clerici Daros ◽  
João Pedro Scherer Cipriani ◽  
Maikel Fernando Menke ◽  
Álysson Raniere Seidel
Keyword(s):  
Power Factor ◽  
Duty Cycle ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Current Control ◽  
Single Stage ◽  
Output Current ◽  
Constant Frequency ◽  
Good Efficiency ◽  
Variable Inductor

This paper presents a boost bridgeless totem-pole converter operating as power factor correction (PFC) stage integrated with a half-bridge LLC resonant converter as power control (PC) stage. The resultant single-stage converter yields in an effective integration, reducing the number of switches from 4 to 2 (50% reduction). This integrated topology aims decreasing conduction and commutation power losses and, moreover, achieving high power factor (PF), low total harmonic distortion (THD) and good efficiency. The converter is designed to have a fixed bus voltage, which is controlled by changing the half-bridge duty cycle under universal input voltage (UIV). However, since the HB duty cycle also affects the LLC converter due to their integration, a variable inductor is employed to control the LLC impedance and achieve a controlled output current and dimming capability, consequently a constant frequency operation is achieved. Simulation results are presented to verify the theorical analysis, through a 100 W LED luminaire. The results show voltage and current levels in the topology, as well as PF and THD levels in compliance with IEC 61000-3-2. Moreover, it is shown the feasibility of output current control capability through variable inductor even with HB duty cycle variation.

Improvement of output current waveforms using SVM technique and fuzzy logic controller for matrix converter

2015 ◽  
Vol 34 (6) ◽  
pp. 1896-1916
Author(s):  
Aziz Boukadoum ◽  
Tahar Bahi ◽  
Youcef Soufi ◽  
Abla Bouguerne ◽  
Sofiane Oudina
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Matrix Converter ◽  
Point Of View ◽  
Power Electronic ◽  
Output Current ◽  
Content Type ◽  
Input And Output

Purpose – The use of power electronic equipment such as conventional AC-DC-AC converters cause several problems in electrical networks and its components. They generate harmonic currents and disturb the electrical power sources; so, it is necessary to research alternative topologies of power electronic converters based on advanced intelligent controllers, which reduce or even eliminate harmonics to achieve energy-saving and environmental protection. The use of matrix converter (MC) is, considered as an attractive solution to maintain pure sinusoidal input and output current waveforms. The paper aims to discuss this issue. Design/methodology/approach – The studied system is composed of a three phase matrix converter (TMC) feeding a linear R, L load and a trees phase rectifier considered as a non-linear load; the proposed control strategy is based on a fuzzy logic controller (FLC) associated to the (space vector modulation) SVM modulation technique, this choice is motivated by the advantages that represent the combination of FLC and SVM in term of power quality enhancement in both input and output sides of MC. Findings – The model is validated based on simulation results that illustrate the effectiveness of the proposed system in term of power quality amelioration. The high performance of the proposed FLC is illustrated in all study cases especially in the case of perturbed input voltage, it is not only able to keep the whole system stable, but also it reduces harmonic distortion THD to respect international standards recommendation. Originality/value – In this paper, an associated linear (RL), non-linear loads and TMC is studied. From the mathematical point of view, the MC is modeled and analyzed. From the technique point of view, the MC allows sinusoidal current absorbance from the network with good qualities in term of harmonic distortion compensation, and high reliability under various loads and disturbed input voltage.

scholarly journals Low power current sources for bioimpedance measurements: a comparison between Howland and OTA-based CMOS circuits

2019 ◽  
Vol 3 (1) ◽  
pp. 66-73 ◽  
Author(s):  
Pedro Bertemes-Filho ◽  
Volney C. Vincence ◽  
Marcio M. Santos ◽  
Ilson X. Zanatta
Keyword(s):  
Low Power ◽  
Current Source ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Wide Frequency Range ◽  
Current Conveyor ◽  
Invasive Technique ◽  
Output Impedance ◽  
Current Frequency ◽  
Class Ab

Abstract Multifrequency Electrical Bioimpedance (MEB) has been widely used as a non-invasive technique for characterizing tissues. Most MEB systems use wideband current sources for injecting current and instrumentation amplifiers for measuring the resultant potential difference. To be viable current sources should have intrinsically high output impedance for a very wide frequency range. Most contemporary current sources in MEB systems are based on the Howland circuit. The objective of this work is to compare the Mirrored Modified Howland Current Source (MMHCS) with three Operational Transconductance Amplifier (OTA) based voltage controlled current sources (i.e., class-A, class-AB and current conveyor). The results show that both current conveyor and class-AB OTA-based current sources have a wider output current frequency response and an output impedance of 226% larger than the MMHCS circuit at 1 MHz. The presented class-AB OTA circuit has a power consumption of 4.6 mW whereas current conveyor consumed 1.6 mW. However, the MMHCS circuit had a maximum total harmonic distortion of 0.5% over the input voltage from -0.5 to +0.5 V. The OTA-based current sources are going to be integrated in a semiconductor process. The results might be useful for cell impedance measurements and for very low power bioimpedance applications.

scholarly journals Temperature independent current conveyor precision full-wave rectifier for low-level signal

2009 ◽  
Vol 22 (1) ◽  
pp. 117-123
Author(s):  
Slobodan Djukic
Keyword(s):  
Input Signal ◽  
Transfer Characteristic ◽  
Current Conveyor ◽  
Current Steering ◽  
Output Stage ◽  
Zero Crossing ◽  
Low Level ◽  
Class A ◽  
Full Wave ◽  
Current Mirrors

A circuit that provides precision rectification low-level input signal with low temperature sensitivity is presented in this paper. It utilizes an improved second type current conveyor based around current-steering output stage and voltage biased silicon diodes, rather than more usual current mirrors. Proposed design of the precision rectifier ensures good current transfer linearity in the range that satisfy class A of the amplifier and good voltage transfer characteristic for low level signals. Distortion during the zero crossing of the input signal is practically eliminated. Design of the proposed rectifier is realized with usual components that can be bought in the market. .

Design and Implementation of CCTA for Low Power Applications: a Review

2020 ◽  
Vol 14 ◽  
Author(s):  
Shailendra Bisariya ◽  
Neelofer Afzal
Keyword(s):  
Signal Processing ◽  
Power Consumption ◽  
Low Power ◽  
Building Blocks ◽  
Analog Signal Processing ◽  
Current Conveyor ◽  
Analog Signal ◽  
Operating Voltage ◽  
Voltage Mode ◽  
Design And Implementation

Background: Researchers have proposed a number of basic building blocks for various electronics applications. The current conveyor trans-conductance amplifier is one of them, which is suitable for linear as well as nonlinear applications of current and voltage mode circuits. Objective: This paper provides a review of the implementations proposed to date for the same with its applications in analog signal processing. The proposed possible applications of this device are also considered. Methods: Keeping in mind the utility of CCTA in low power VLSI application areas, a number of parameters like power consumption, operating voltage, 3dB bandwidth, trans-conductance, as well as a number of transistors used for implementation and technology are taken into consideration. Results: The results available of all the structures are compared and analyzed to investigate the potential advantages as well as disadvantages of this CCTA block and its limitations. Conclusion: This review concluded with a remark on the best suitable CCTA structure for low power applications and its future possibilities to use.

Low-Voltage Variable Gain Current Amplifier for High-Voltage Signal Processing

2009 ◽  
Vol 129 (8) ◽  
pp. 1511-1517
Author(s):  
Nicodimus Retdian ◽  
Jieting Zhang ◽  
Takahide Sato ◽  
Shigetaka Takagi
Keyword(s):  
Signal Processing ◽  
High Voltage ◽  
Low Voltage ◽  
Current Amplifier ◽  
Variable Gain ◽  
Voltage Signal
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