NDLI: Generalised approach for active-RC quadrature oscillator circuit with grounded capacitors

Content Provider	IET Digital Library
Author	Maheshwari, Sudhanshu
Abstract	This study introduces a new approach for realising a sinusoidal oscillator with three outputs, using an active-resistor-capacitor (RC) approach. Using the proposed approach, a new circuit employing three current feedback operational amplifiers and passive components is further introduced. The circuit employs two grounded capacitors and four resistors, out of which one is grounded. The new circuit based on the proposed generalised approach is relatively insensitive to the parasitic effects of active elements, and easy to design, by way of non-interaction of frequency and condition of oscillations. The proposed approach and the new proposed circuit provide three outputs, two of which are at low impedance nodes. The proposed generalised approach and the new circuit are verified through simulation and experimental results, using commercially available AD-844s integrated circuits and passive components. Thus, the work advances the existing knowledge on the active-RC oscillator design.
Starting Page	758
Ending Page	761
Page Count	4
ISSN	1751858X
Volume Number	14
e-ISSN	17518598
Issue Number	Issue 6, Sep (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cds/14/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cds.2019.0176
Journal	IET Circuits, Devices & Systems
Publisher Date	2020-03-25
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Element Active-RC Approach Active-RC Oscillator Design Active-RC Quadrature Oscillator Circuit AD-844s Integrated Circuit Amplifiers Analogue Circuit Design Current Feedback Operational Amplifiers Grounded Capacitor Integrated Circuit Design Integrated Circuit Modelling Modelling Operational Amplifier Oscillator Passive Component RC Circuit Sinusoidal Oscillator Testing
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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