New realization of third order sinusoidal oscillator using single OTRA

Komanapalli, Gurumurthy; Pandey, Neeta; Pandey, Rajeshwari

doi:10.1016/j.aeue.2018.06.005

Cited by 22 publications

(17 citation statements)

References 34 publications

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“…For the proposed configurations of Figure , the layouts and corresponding prelayout and postlayout transient outputs for chosen passive component values are shown in Table . The postlayout simulation results validate the layout implemented by physical verification checks such as design rule check (DRC), layout vs schematic check (LVS), and RC parasitic extraction. Due to the inclusion of parasitics, the postlayout simulated frequencies are slightly decreased compared with simulated frequencies.…”

Section: Simulation and Layout Resultsmentioning

confidence: 71%

“…It is relevant to mention that all the proposed designs have floating passive components. Although grounded capacitors are preferred from fabrication viewpoint, these can be implemented using top‐quality IC technology of today, which offers using metal‐nsulator‐metal (MIM) or metal‐oxide‐metal (MOM) double poly (poly1‐poly2) capacitor processes …”

Section: Proposed Oscillator Configurationsmentioning

confidence: 99%

“…Thus, sensitivity is an important performance criterion for any circuit that enables analog IC designer to choose which elements should be carefully designed to maintain high circuit performance. Therefore, sensitivity analysis for the proposed circuits is carried out, and sensitivities of f o for all configurations with respect to various circuit parameters are listed in Table .…”

Section: Sensitivity Analysismentioning

confidence: 99%

“…In recent past, operational transresistance amplifier (OTRA) has gained much consideration from several researchers, due to its inherent pros like bandwidth independent of closed loop gain, higher slew rate, and simplicity in assimilating the effect of parasitic capacitances at the input ports. As a result, OTRA is being used widely for signal processing and generating applications (see previous works and the references cited therein). Consequently, several authors presented different OTRA‐based SO topologies in which oscillators with FO of form 1/2πRC are presented in previous literatures .…”

Section: Introductionmentioning

confidence: 99%

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New sinusoidal oscillator configurations using operational transresistance amplifier

Komanapalli

Pandey

2019

Circuit Theory & Apps

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The objective of this brief is to introduce four new structures of electronically tunable sinusoidal oscillators (SOs) designed using operational transresistance amplifier (OTRA). Each of the proposed SO consists of forward path derived from a generic structure along with one/two OTRA-based resistive gain stages or differentiator in its feedback path. All the proposed SOs enjoy independent tuning of the frequency of oscillation (FO) through resistors without affecting the condition of oscillation (CO). Further, all topologies are found to exhibit low f o sensitivities at all frequencies with respect to circuit parameters, and the second topology is capable of achieving very low frequencies (VLFs) using less RC component spread and provides linear tuning too. The fourth circuit provides quadrature output. The proposed SOs have been successfully implemented and verified in 180-nm CMOS technology node using ADE (analog design environment) tool Cadence Virtuoso. Both prelayout and postlayout simulation results have been included. To assess the oscillator prefabrication performances, Monte Carlo and process-voltage-temperature (PVT) analyses have been performed. The total harmonic distortion (THD) is observed to be less than 3.5%.

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Section: Simulation and Layout Resultsmentioning

confidence: 71%

Section: Proposed Oscillator Configurationsmentioning

confidence: 99%

Section: Sensitivity Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New sinusoidal oscillator configurations using operational transresistance amplifier

Komanapalli

Pandey

2019

Circuit Theory & Apps

Self Cite

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“…Recently, an active current-mode device, called an operational transresistance amplifier (OTRA), has come to limelight with the introduction of several high performances CMOS OTRA realizations. Several waveform generators using an operational transresistance amplifier (OTRA) were reported earlier in the literature [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. Square-waveform generator using single OTRA and a few passive components was proposed in [28].…”

Section: Introductionmentioning

confidence: 99%

Electronic Tuning Square-Wave Generators with Improved Linearity Using Operational Transresistance Amplifier

Pittala¹,

Srinivasulu

2020

JLPEA

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Two new electronic tuning current-mode square-wave generators are introduced in the ensuing paper. In the first proposed square-wave generator circuit, one Operational Trans-resistance Amplifier (OTRA) and two passive components are involved, along with two NMOS depletion mode transistors. This circuit generates a square-wave with almost equal and fixed duty cycles. The second proposed circuit is able to control both on-duty and off-duty cycles independently with the help of two passive components, two NMOS depletion mode transistors, and two diodes connected to the circuit. The frequency of the proposed circuits can be adjusted with the passive components connected to the circuit. Moreover, electronic tuning can also be achieved with the proposed circuits. The measured results that are included in the paper show the linear variation of a time period as compared with existing OTRA based square waveform generator. The performance of the proposed circuits is examined while using SPICE models. These circuits are built on a laboratory breadboard using commercially available Current Feedback Operational Amplifier (AD844 AN) and passive components are connected externally and tested for square waveform generation. The obtained results demonstrate good agreement with the theoretical values.

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Systematic realization of low‐frequency third‐order sinusoidal oscillators

Raj

Kumar

Bhaskar

2021

Circuit Theory & Apps

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In this paper, a systematic realization technique for low-frequency third-order sinusoidal oscillators (TOSOs) with independent control of condition of oscillation (CO) and frequency of oscillation (FO), employing minimum number of resistors and grounded capacitors, has been presented. Twelve new matrices have been systematically derived. These 12 matrices lead to four distinct low-frequency sinusoidal oscillators with independent control of CO and FO. Workability of these proposed oscillators has been validated through experimental results of low-frequency oscillations operating at 3.03 Hz, realized with off-the-shelf available IC AD844 type CFOAs. The total harmonic distortion of the presented oscillators is below 0.74%, and the frequency deviations are less than 1.06%.

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New realization of third order sinusoidal oscillator using single OTRA

Cited by 22 publications

References 34 publications

New sinusoidal oscillator configurations using operational transresistance amplifier

New sinusoidal oscillator configurations using operational transresistance amplifier

Electronic Tuning Square-Wave Generators with Improved Linearity Using Operational Transresistance Amplifier

Systematic realization of low‐frequency third‐order sinusoidal oscillators

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