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OTA based on CMOS inverters and application in the design of tunable bandpass filter

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Abstract

A new operational transconductance amplifier (OTA) builds with CMOS inverters only is proposed in this paper. Simulations with typical BSIM3V3 parameters of a 0.35 μm CMOS process have shown a 3.56 GHz gain-bandwidth product under 2.5 V supply voltage. The corresponding total harmonic distortion is equal to 0.46% for 2 V peak–peak differential output voltage. At the same supply voltage, the circuit can provided at each output a voltage swing of 2.25 V peak–peak. From VDD = 2 V to VDD = 2.5 V the differential transconductance varies from 72 to 108.4 μΩ−1. The corresponding common mode rejection ratio and the total power consumption are always lower than −31 dBc and 800 μW, respectively. Typical application of a biquad filter is proposed to illustrate the circuit capabilities.

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Acknowledgement

Thanks are due to the anonymous reviewers for their valuable feedback.

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Authors and Affiliations

  1. Institut Matériaux Microélectronique Nanosciences de Provence (IM2NP), UMR CNRS 6242, Université Paul Cézanne, Provence et Sud Toulon-Var, Marseille Cedex, France

    H. Barthélemy, S. Meillère, J. Gaubert, N. Dehaese & S. Bourdel

  2. Université Sud Toulon Var, Bâtiment R, BP 132, 83957, La Garde Cedex, France

    H. Barthélemy

  3. Polytech’Marseille, IMT Technopôle de Château Gombert, 13460, Marseille Cedex 20, France

    S. Meillère, J. Gaubert, N. Dehaese & S. Bourdel

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  1. H. Barthélemy
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  2. S. Meillère
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  3. J. Gaubert
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  4. N. Dehaese
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  5. S. Bourdel
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Correspondence to H. Barthélemy.

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Barthélemy, H., Meillère, S., Gaubert, J. et al. OTA based on CMOS inverters and application in the design of tunable bandpass filter. Analog Integr Circ Sig Process 57, 169–178 (2008). https://doi.org/10.1007/s10470-008-9167-8

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  • DOI: https://doi.org/10.1007/s10470-008-9167-8

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