Differential Precision Rectifier using Single CMOS DVCC

Nahhas, Ahmed M.

doi:10.5120/10643-5400

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…In another group of precision rectifiers, a transistor connected to the current output of an active element operates as a switch. For this purpose, the current conveyor [15,16] or transconductance amplifiers [17][18][19] are used. Unfortunately, except of different active elements types and different approaches used in the circuits, any performance comparison of the fullwave rectifiers is mostly not possible, as the authors show the workability of the rectifiers just on the transient response, where it is not clear if the chosen frequency of the input signal represents the limits of the circuit.…”

Section: Introductionmentioning

confidence: 99%

Voltage-mode full-wave rectifier based on DXCCII

Koton

Vrba

Herencsár

2014

Analog Integr Circ Sig Process

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The paper deals with the design and performance analyses of a current conveyor based voltage-mode full-wave rectifier. In the structure of the proposed nonlinear circuit the second-generation current conveyor and dual-X current conveyor have been used as active elements. In the circuit the current sourcing scheme of the diodes is used to enable high-frequency signal processing. Except the active elements and only two rectifying diodes, other two resistors are required, generally operating as simple voltage-to-current and current-to-voltage converters. Using the CMOS implementation of the active elements, the performance of the rectifier was analyzed by evaluating the frequency dependent RMS error and DC transient value for different values of input voltage magnitudes. Furthermore, using readily available integrated circuits, the performance of the proposed structure has also been verified by experimental measurements that show the feasibility of the voltage-mode full-wave rectifier.

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Section: Introductionmentioning

confidence: 99%

Voltage-mode full-wave rectifier based on DXCCII

Koton

Vrba

Herencsár

2014

Analog Integr Circ Sig Process

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“…3) and repeating the analysis steps in Sec. 2, the currents I X2 and I Z2 in the triggering state were modi¯ed according to (14) and (15). The decreasing rates of v C against time for VCM and RCM were determined using (16) and (17), respectively.…”

Section: Non-ideality and Design Considerationsmentioning

confidence: 99%

Dual-Mode Controlled Pulse Width Monostable Multivibrator Using DVCCs

Chien

2015

J CIRCUIT SYST COMP

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This paper proposes a dual-mode controlled pulse width monostable multivibrator used for analogue signal processing applications that employs two di®erential voltage current conveyors (DVCCs), four passive components and an analogue switch. Unlike the traditional operational-ampli¯er-based monostable multivibrators, the proposed circuit contributes a dual-mode controlled scheme for adjusting the output pulse width through a voltage source and a grounded resistor. This paper discusses several previous designs and presents the circuit operations, related governing formulas, non-ideal e®ect problems, design considerations, and experimental examples of the proposed circuit. A prototype circuit was implemented, and commercially integrated circuits and discrete passive components were used to execute the experimental tests. The features of the proposed circuit are discussed, and the experimental results indicated that the circuit is feasibly used in dual-mode controlled pulse width for the output pulse and were consistent with those of the theoretical analyses.

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“…In order to reduce dissipation on the shunt resistor a low value has been chosen, so the AC voltages are well below the forward voltage of a Schottky diode, standard bridge rectifiers are unusable. To counteract this weakness, a precision rectifier [1][2][3][4][5] has been introduced, which can accurately rectify the low AC signals formed across the sensing element.…”

Section: Current Measurement Methodsmentioning

confidence: 99%

Digitally Controlled AC Current Measurement and Protection Techniques

Turos

Csernáth²,

Hegyi³

2017

MACRo 2015

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This paper describes a cost effective AC current measurement method that avoids complex AC to DC current measurements by converting an amplified and rectified AC voltage drop across a shunt resistor to a duty cycle of a PWM signal. The current measurement chain output is fed into a microcontroller unit (MCU) and into a short circuit protection block that inhibits AC load drivers in case of overcurrent or short circuit events, overriding the state set by the MCU control algorithm. The authors present a mathematical model, simulations and a practical evaluation of customdeveloped circuits that are capable to reach a convincing level of measurement precision. By counting a given number of consecutive AC periods, the effect of inrush current generated by inductive AC loads is filtered. The proposed solution allows inrush currents up to 3A, fitting the consumption range of AC control elements met in household application circuits, such as relays or solenoid valves.

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Differential Precision Rectifier using Single CMOS DVCC

Cited by 3 publications

References 22 publications

Voltage-mode full-wave rectifier based on DXCCII

Voltage-mode full-wave rectifier based on DXCCII

Dual-Mode Controlled Pulse Width Monostable Multivibrator Using DVCCs

Digitally Controlled AC Current Measurement and Protection Techniques

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