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Generation of square and triangular wave with independently controllable frequency and amplitude using OTAs only and its application in PWM

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Abstract

This paper presents a self-generating square/triangular wave generator using only the CMOS Operational Transconductance Amplifiers (OTAs) and a grounded capacitor. The output frequency and amplitude of the proposed circuit can be independently and electronically adjusted. The proposed circuit validates its advantage by consuming less amount of power, which is about 71.3 µW. The theoretical aspects are authentically showcased using the PSPICE simulation results. The performance of the proposed circuit is also verified through pre layout and post layout simulation results using the 90 nm GPDK CMOS parameters. A prototype of this circuit has been made using commercially available IC CA3080 for experimental verification. Experimentation also gives the similar output as per the theoretical proposition. The designed circuit is also made applicable to perform pulse width modulation (PWM).

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Acknowledgements

This work is partly supported by the TEQIP-II Project under Govt. of India (Rajeev Kr. Ranjan/MRP-DDF/ECE/TEQIP) at Indian Institute of Technology (Indian School of Mines) Dhanbad, India.

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Authors and Affiliations

  1. Department of Electronics Engineering, Indian Institute of Technology (ISM), Dhanbad, Jharkhand, 826004, India

    Rajeev Kumar Ranjan, Kaushik Mazumdar, Ratnadeep Pal & Satish Chandra

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  1. Rajeev Kumar Ranjan
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  2. Kaushik Mazumdar
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  3. Ratnadeep Pal
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  4. Satish Chandra
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Correspondence to Rajeev Kumar Ranjan.

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Ranjan, R.K., Mazumdar, K., Pal, R. et al. Generation of square and triangular wave with independently controllable frequency and amplitude using OTAs only and its application in PWM. Analog Integr Circ Sig Process 92, 15–27 (2017). https://doi.org/10.1007/s10470-017-0971-x

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  • DOI: https://doi.org/10.1007/s10470-017-0971-x

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