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Synthesis of Sinusoidal Oscillators Using CFOAs

  • Chapter
Current Feedback Operational Amplifiers and Their Applications

Part of the book series: Analog Circuits and Signal Processing ((ACSP))

Abstract

After briefly outlining the history of the evolution of single element controlled oscillators, the advantages of realizing a Wien-bridge Oscillator using a CFOA have been brought out. Due to significant advantages offered by CFOA-based sinusoidal oscillators, a variety of prominent single resistance controlled oscillators (SRCO) have been described which include single CFOA-based SRCOs, two-CFOA-two-grounded-capacitors based SRCOs (synthesized through a systematic state variable methodology), quadrature SRCOs, Active-R SRCOs, SRCOs with explicit current output and fully-uncoupled SRCOs. Also included are a variety of voltage controlled oscillators (VCO) using CFOAs employing FET-based VCOs as well as analog multiplier (AM)-based VCOs (which also have been systematically derived using the state variable methodology). Various characteristic features and advantages of all the discussed topologies have been highlighted and a number of ideas for further research have been pointed out.

The original version of this chapter was revised. An erratum to the chapter can be found at DOI: http://dx.doi.org/10.1007/978-1-4614-5188-4_9

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Notes

  1. 1.

    It has come to the attention of the first author only at the time of finalizing this chapter (13–17 September 2012) that a quite similar single op-amp SRCO employing only five resistors and two capacitors, was proposed by Soliman and Awad in 1978 in [87].

  2. 2.

    In spite of the criticism of [88], the current-mode techniques have given way to a number of important analog signal processing/signal generation circuits over the past three decades.

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Authors and Affiliations

  1. Division of Electronics and Communication Engineering, Netaji Subhas Institute of Technology, New Delhi, India

    Raj Senani

  2. Jamia Millia Islamia, Electronics and Communication Engineering, F/O Engineering and Technology, New Delhi, India

    D. R. Bhaskar

  3. Electronics and Communication Engineering, HRCT Group of Institutions, F/O Engineering and Technology, Mota, Ghaziabad, India

    A. K. Singh

  4. Department of Electronics Engineering, Institute of Engineering and Technology, Lucknow, India

    V. K. Singh

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  1. Raj Senani
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  2. D. R. Bhaskar
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  3. A. K. Singh
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  4. V. K. Singh
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Senani, R., Bhaskar, D.R., Singh, A.K., Singh, V.K. (2013). Synthesis of Sinusoidal Oscillators Using CFOAs. In: Current Feedback Operational Amplifiers and Their Applications. Analog Circuits and Signal Processing. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-5188-4_5

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  • DOI: https://doi.org/10.1007/978-1-4614-5188-4_5

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