Bhartendu Chaturvedi

Bio: Bhartendu Chaturvedi is an academic researcher from Jaypee Institute of Information Technology. The author has contributed to research in topics: Current conveyor & Resistor. The author has an hindex of 15, co-authored 60 publications receiving 575 citations. Previous affiliations of Bhartendu Chaturvedi include Aligarh Muslim University.

High-input low-output impedance all-pass filters using one active element

Abstract: This study presents four new voltage mode first-order all-pass filters using a newly developed single Dual-X current conveyor with buffered output. The proposed circuits possess high-input impedance, low-output impedance and require either two or three passive elements. An application of new circuits is also given in realising the quadrature oscillator. Non-ideal and sensitivity analysis is also performed. The circuit performances are depicted through PSPICE simulations, which show good agreement to theoretical anticipations. Possible realisation using AD-844 along with some experimental results are also given for completeness sake. The new circuits are expected to enhance the already-existing knowledge on the subject.

Third-Order Quadrature Oscillator Circuit with Current and Voltage Outputs

Abstract: The paper presents a new quadrature oscillator of third order which can provide four quadrature current outputs and two quadrature voltage outputs. The new circuit employs three differential voltage current conveyors and six passive components, most of which are in grounded form. Circuit operation at high frequencies is verified along with nonideality and parasitic study. The circuit enhancement for generation of four phase clock waveforms is also given. The proposed circuit is a novel addition to the oscillator family.

Current Mode Biquad Filter with Minimum Component Count

Abstract: The paper presents a new current mode biquadratic filter with one input and three outputs using differential voltage current conveyor (DVCC) and four passive components. The proposed circuit can simultaneously realize low-pass, band-pass, and high-pass filter functions without changing the circuit topology and passive elements. The circuit exhibits a good frequency performance and low-sensitivity figures. PSPICE simulation using 0.5 μm CMOS parameters are given to validate the proposed circuit. The circuit provides a simple yet novel solution to the current-mode filtering after appropriate incorporation of current sensing elements in form of current buffers.

Novel CMOS Dual-X Current Conveyor Transconductance Amplifier Realization with Current-Mode Multifunction Filter and Quadrature Oscillator

Abstract: This paper presents a novel active element, namely dual-X current conveyor transconductance amplifier. The CMOS implementation, parasitic model and characteristic performance parameters of the proposed dual-X current conveyor transconductance amplifier have been explored. The proposed active element has the advantages of good operational bandwidth, good dynamic range and low power consumption. Additionally, current-mode multifunction filter and quadrature oscillator are proposed to examine the applicability of the newly proposed active element. The proposed current-mode multifunction filter provides the responses, low-pass, high-pass and band-pass simultaneously without any circuit modification. The proposed quadrature oscillator circuit simultaneously generates three current outputs and three voltage outputs. The non-ideal analyses of both current-mode multifunction filter and quadrature oscillator are also included. Moreover, the active and passive sensitivities of both current-mode multifunction filter and quadrature oscillator are calculated which are found to be less than unity in magnitude. HSPICE simulation results are depicted to confirm the theoretical analyses. Moreover, practicality of novel dual-X current conveyor transconductance amplifier is examined through the experimental results of the proposed quadrature oscillator.

Low Voltage Operated Current-Mode First-Order Universal Filter and Sinusoidal Oscillator Suitable for Signal Processing Applications

Abstract: This paper introduces a current-mode first-order universal filter which is realized using single modified dual-X current conveyor transconductance amplifier and two capacitors only. The circuit configuration is appropriate to monolithic integration. The circuit enjoys benefits of low input and high output impedances making the circuit easily cascadable, electronically tunable pole frequency and low operating supply voltages. The non-ideal and parasitic analyses of the circuit are explored. The cascadability of proposed first-order filter is verified by realizing a second-order all-pass filter. Additionally, one application of proposed first-order universal filter in terms of voltage-mode sinusoidal oscillator is also presented. The oscillator circuit provides two 180° out of phase voltage signals, simultaneously. The output voltage signals are obtainable from low impedance terminals. To validate the proposed circuits, HSPICE simulations are done. Moreover, to explore the practical aspects of proposed circuits, experimental results of first-order universal filter for all-pass function and second-order all-pass filter, are carried out by using commercially available ICs.

Design Of Analog Cmos Integrated Circuits

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Universal Current-Mode Biquad Filter Using a VDTA

Abstract: This paper presents a new current-mode single input multi output (SIMO) type biquad employing one voltage differencing transconductance amplifier (VDTA), two grounded capacitors and a single grounded resistor. The configuration realizes all basic filter functions (i.e. Low Pass (LP), High Pass (HP), Band Pass (BP), Notch (BR) and All Pass (AP)). The natural frequency (ω0) and bandwidth (BW) are independently tunable. The workability of proposed configuration has been verified using SPICE simulation with TSMC CMOS 0.18 μm process parameters.

Catalog of Realizations for DXCCII using Commercially Available ICs and Applications

Abstract: This paper presents fifteen distinct practical realizations for dual-X second generation current conveyor (DXCCII) using commercially available integrated circuits. Detailed comparisons and results are presented to verify the utility of proposed realizations. The catalog of proposed realizations is a first attempt and is expected to be useful for testing newly developed circuits based on dual-X second generation current conveyor. Each of the first fourteen proposed realizations uses four ICs. One three IC based implementation is further given making the total count fifteen. Some additional features are also explored which further enhance the versatility of DXCCII. The paper further presents a novel and compact quadrature oscillator to verify the applicability of the proposed realizations. Single resistance control of the frequency of oscillation is also demonstrated by employing the new gain-variable DXCCII. Experimental results are also included along with simulation results to validate the proposed theory and its practical significance.