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Design and application of a novel low-voltage low-power OTA using signal attenuation technique for high linearity

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Abstract

This paper presents static and dynamic theoretical analysis of a new Operational Transconductance Amplifier (OTA) dedicated to low-voltage and low-power applications. High linearity is obtained using signal attenuation for rail-to-rail operation. Design, layout and post-layout simulations have been carried-out with Cadence Virtuoso in a 0.18µm CMOS technology. Post-Layout Simulation (PLS) demonstrates proper operation down to ± 0.75 V supply voltage with a high open loop small-signal voltage gain of 58.26dB, a unity gain frequency of 18MHz and a total harmonic distortion of -66.55dB at 100 kHz for a peak-to-peak input voltage of 0.8V. Based on this circuit, two applications have been successfully demonstrated: on the one side, a 5th order Butterworth \(G_{mC}\) filter and, on the other side, a voltage mode instrumentation amplifier.

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Author information

Author notes

  1. Pascal Nouet and Néjib Hassen have equally contributed to this work.

Authors and Affiliations

  1. Micro-electronics and Instrumentation Laboratory, University of Monastir, Monastir, Tunisia

    Karima Garradhi & Néjib Hassen

  2. LIRMM, University of Montpellier, CNRS, Montpellier, France

    Pascal Nouet

Authors
  1. Karima Garradhi
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  2. Pascal Nouet
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  3. Néjib Hassen
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Contributions

K.G. prepared and wrote the main manuscript. P.N. and N.H. reviewed the main manuscript.

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Correspondence to Karima Garradhi.

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Garradhi, K., Nouet, P. & Hassen, N. Design and application of a novel low-voltage low-power OTA using signal attenuation technique for high linearity. Analog Integr Circ Sig Process 115, 319–334 (2023). https://doi.org/10.1007/s10470-023-02163-x

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  • DOI: https://doi.org/10.1007/s10470-023-02163-x

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