MOS-C Third Order Quadrature Oscillator Using OTRA

Pandey, Rajeshwari; Pandey, Neeta; Paul, Sajal K.

doi:10.1109/iccct.2012.24

Cited by 28 publications

(29 citation statements)

References 15 publications

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“…On the other hand TOQO configures [18,22] have not specified scheme used in the circuits implementation. It is also observed that few recent TOQOs [20][21][22] use a relatively new ABB named operational transresistance amplifier (OTRA) [27].…”

Section: Introductionmentioning

confidence: 98%

“…The implementation [17] uses three cascaded first order low pass filters coupled with a gained feedback. The design using a cascade of a low pass biquad circuits along with a non-inverting/inverting integrator circuit in a closed loop [8,10,11,[13][14][15]20] is quite well known. Recently a new approach has been reported using the cascade of a high pass biquad with a differentiator [19].…”

Section: Introductionmentioning

confidence: 99%

“…A lot of studies have been carried out on SOQOs till date, however more recently few third order quadrature oscillators (TOQOs) have emerged. Several methods for realization of voltage mode (VM) and current mode (CM) TOQOs using different analog building blocks (ABBs) are available in the literatures [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] using various design principle. In [6] three lossy integrators are used.…”

Section: Introductionmentioning

confidence: 99%

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Voltage mode third order quadrature oscillators using OTRAs

Nagar

Paul

2016

Analog Integr Circ Sig Process

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In this paper, the authors present two topologies of voltage mode third order quadrature oscillator circuit using operational transresistance amplifier (OTRA). The first circuit is based on low-pass filter and integrator combination, whereas the second one is high-pass filter and differentiator combination. Both the circuits utilize two OTRAs and three resistors and capacitors each. The frequency of oscillation and condition of oscillation can be adjusted independent of each other in both the circuits. The non-ideality analysis of the circuits are also included. The PSPICE simulation and experimental results verify the theoretical proposition.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Voltage mode third order quadrature oscillators using OTRAs

Nagar

Paul

2016

Analog Integr Circ Sig Process

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“…This has led a consistent research effort towards second order QO design using wide variety of active blocks, as is evident from vast literature available [2][3][4][5][6][7][8][9][10][11][12][13][14] .It is well known that higher order networks, provide better accuracy, frequency response and distortion performance [15][16][17] as compared to lower order circuits. Owing to this in recent past few third order QO designs [15], [16], [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] have been reported. Realizing sinusoidal oscillator using closed loop with positive feedback is a well-established method.…”

Section: Introductionmentioning

confidence: 99%

New Realization of Quadrature Oscillator using OTRA

Komanapalli

Pandey

2017

IJECE

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In this paper a new, operational transresistance amplifier (OTRA) based, third order quadrature oscillator (QO) is presented. The proposed structure forms a closed loop using a high pass filter and differentiator. All the resistors employed in the circuit can be implemented using matched transistors operating in linear region thereby making the proposed structure fully integrated and electronically tunable. The effect of non-idealities of OTRA has been analyzed which suggests that for high frequency applications self-compensation can be used. Workability of the proposed QO is verified through SPICE simulations using 0.18μm AGILENT CMOS process parameters. Total harmonic distortion (THD) for the proposed QO is found to be less than 2.5%. The sensitivity, phasenoise analysis is also discussed for the proposed structure. Keyword:OTRA Phasenoise Quadrature oscillator Sensitivity THD Copyright © 2017 Institute of Advanced Engineering and Science.All rights reserved. Corresponding Author:Gurumurthy Komanaplli , Department of Electronics and communication Engineering, Delhi Technological University, Bawana Road, New Delhi, India-110085. Email: murthykgm@gmail.com INTRODUCTIONIn last few decades current-mode (CM) processing has evolved as a promising design technique to provide efficient solutions to circuit design problems. This evolution has resulted in emergence of numerous CM analog building blocks [1].The operational trans resistance amplifier (OTRA) is one among these blocks. It is a high gain current input, voltage output amplifier [2] and uses current feedback technique which makes its bandwidth almost independent of the closed loop gain. Additionally it is free from the effect of parasitic capacitances at the input due to virtually internally grounded input terminals [2] and hence non-ideality problem is less in circuits implemented using OTRA.Quadrature oscillators (QO) are an important class of circuits and find wide application in communication, power electronics and instrumentation. This has led a consistent research effort towards second order QO design using wide variety of active blocks, as is evident from vast literature available [2][3][4][5][6][7][8][9][10][11][12][13][14] .It is well known that higher order networks, provide better accuracy, frequency response and distortion performance [15][16][17] as compared to lower order circuits. Owing to this in recent past few third order QO designs [15], [16], [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] have been reported. Realizing sinusoidal oscillator using closed loop with positive feedback is a well-established method. A careful observation suggests that all the reported third order QO designs are based on forming closed loop using combinations of lossy and/or lossless integrators. In this paper a new OTRA based third order QO is proposed that adapts the scheme of using second order high pass filter and a differentiator in a feedback loop [32].A comparative statement of the proposed structure with previously reported QO circuits is reco...

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“…The QOs using active building blocks such as operational amplifier [31], second-generation current conveyor (CCII) [32][33][34], differential voltage current conveyor (DVCC) [35], operational transresistance amplifier (OTRA) [36], [37], [50], offer orthogonal control of CO and FO, but these structures lack the electronic tuning capability. A number of electronic-controlled third-order QOs have been reported using active building blocks such as current-controlled CCII (CCCII) [38], [39], current difference transconductance amplifier (CDTA) [40], [41], current-controlled CDTA (CCDTA) [42], current-controlled current conveyor transconductance amplifier (CCCTA) [43], [44], OTRA and MOS-C [45], DDCC and VDTA [46], [51], [52], differential voltage current conveyor transconductance amplifier (DVCCTA) [47]. They exhibit high potential for enjoying up the electronic tunability.…”

Section: Introductionmentioning

confidence: 99%