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Noise Immune Charge Amplifier for Piezoelectric Accelerometers

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Abstract

A charge amplifier with active in-phase interference suppression is intended for investigations at impact loads accompanied by high-level noises. To suppress low-frequency in-phase interfering signals, a compensation circuit with a differential amplifier is used, and, to suppress high-frequency ones, an input longitudinal transformer is used. The sensitivity of the amplifier is 0.25 mV/pC, in-phase interference suppression factor is 40 dB at an input cable length of ∼100 m.

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REFERENCES

  1. Gal'perin, M.V., Vvedenie v skhemotekhniku (Introduction to the Art of Electronics), Moscow: Energoizdat, 1982.

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  2. Mark Serridzh and Torben R. Likht, Spravochnik po p'ezoelektricheskim akselerometram i predusilitelyam (Handbook for Electric Accelerometers and Preamplifiers), Bryul' i K”er, 1987.

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Authors and Affiliations

  1. Physicotechnical Institute, Ural Division, Russian Academy of Sciences, ul. Kirova 132, Izhevsk, 426000, Russia

    V. A. Kolyasev, S. V. Len'kov & S. M. Molin

Authors
  1. V. A. Kolyasev
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  2. S. V. Len'kov
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  3. S. M. Molin
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Kolyasev, V.A., Len'kov, S.V. & Molin, S.M. Noise Immune Charge Amplifier for Piezoelectric Accelerometers. Instruments and Experimental Techniques 44, 45–47 (2001). https://doi.org/10.1023/A:1004120730866

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  • DOI: https://doi.org/10.1023/A:1004120730866

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