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

Maheshwari, Sudhanshu; Chaturvedi, Bhartendu

doi:10.1049/iet-cds.2011.0213

Cited by 52 publications

(36 citation statements)

References 37 publications

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“…Realization of several variants of AP filters had been reported in the recent past following the appearance of various types of active building blocks, e.g., voltage op-amp [1], current conveyor [2,3], DVCCTA [4], DXCCII [5], DDA [6], CITA [7], DDCC [8], VD-DIBA [9], VDIBA [10], DVCC with OTA [11] and DO-CCC [12]. Albeit most of these designs are passive tuned, only few versions of electronically tunable topologies are also reported recently [10,11,12].…”

Section: Introductionmentioning

confidence: 99%

Electronically tunable allpass filter: linear VCO design

Nandi

Mathur

Pattanayak³

2016

IEICE Electron. Express

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A new electronically tunable allpass filter (ETAF) realization using the composite Current Feedback Amplifier (CFA) and Multiplication Mode Current Conveyor (MMCC) building blocks is proposed. First order non-minimum phase function with electronically variable output phase is derived. Extension of the filter to a linear quadrature-VCO design is then implemented. Simulation test responses of all these functions are satisfactorily verified.

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Section: Introductionmentioning

confidence: 99%

Electronically tunable allpass filter: linear VCO design

Nandi

Mathur

Pattanayak³

2016

IEICE Electron. Express

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“…Realization of APF had been proposed earlier with various types of active building blocks (ABBs), e.g., voltage op-amp [1,2], current conveyor-CC [3,4], DDA [5], DDCC [6], CDTA [7], CITA [8], DVCC [9,10] VD-DIBA [11], DXCCII [12], VDIBA [13] and DVCCTA [14]. Here we present a simple single CFA circuit topology for first order APF realization using a grounded capacitor.…”

Section: Introductionmentioning

confidence: 99%

“…Literature study reveals that APFs proposed recently, are based on active building blocks which are either assorted version of two types of devices [7,8,11,12], or are topological variants of a primary device (e.g., OTA or CC/DVCC) conjoined with additional voltage/ current differencing unit [4,5,6,9,10] (VDU/CDU); hence an elaborate set of device-nodal relations with associated realizability constraints. A description of these implementations are listed in Table I.…”

Section: Introductionmentioning

confidence: 99%

Single-CFA first-order allpass filter

Nandi

Mathur

Pattanayak³

2016

IEICE Electron. Express

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A simple first order allpass filter (APF) realization scheme with single current feedback amplifier (CFA) is presented; the phase-select component Y (= sC) is grounded. Analysis indicates that effects of imperfect port mismatch ratio of the CFA are quite insignificant. However the device parasitic capacitors introduce certain phase error at relatively higher frequencies. This simple circuit may be extended to second order APF design, if desired with Y as a shunt −LC resonator; L being a lossless inductor simulated by a DVCCTA element. Literature study on recent first order APF indicates that these are based on active elements that are based essentially on assorted conjoined versions of two types of devices.

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“…In this paper, a new CMQO based on MO-DXCCII is presented. A dual-X second generation current conveyor (DX-CCII) is a versatile element, which has a large number of applications in analog signal processing [17][18][19][20][21][22]. The proposed circuit employs two MO-DXCCIIs, two grounded capacitors and two resistors.…”

Section: Introductionmentioning

confidence: 99%

A Novel MO-DXCCII based CMQO Operated at Low Voltage

Kumar¹,

Chaturvedi²

2016

gijet

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Abstract-In this paper, a new current-mode quadrature oscillator (CMQO) is proposed using two grounded capacitors and two resistors along with two multi-output dual-X second generation current conveyors (MO-DXCCII). The proposed circuit provides three current outputs simultaneously with high output impedances. The circuit of proposed quadrature oscillator also enjoys the low active and passive sensitivities. The new circuit is suited for high frequency and low operating voltage operation also. The proposed circuit is also made resistorless by using MOS based active resistors. HSPICE simulation results are given to confirm the theory.

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

Cited by 52 publications

References 37 publications

Electronically tunable allpass filter: linear VCO design

Electronically tunable allpass filter: linear VCO design

Single-CFA first-order allpass filter

A Novel MO-DXCCII based CMQO Operated at Low Voltage

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