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Galvanometers with photoelectric feed-back

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Hungarica Acta Physica

Summary

The method of influencing the sensitivity of moving coil galvanometers by photo-electric feed-back (photo-electric amplification of galvanometer deflections) described already by many authors have been extended in respect of damping and period of oscillation. This was done by feeding back currents which are proportional to the first and the second derivative of the deflection respectively. By neutralising the damping the critical resistance was diminished i. e. the voltage sensitivity was increased as much as twenty-fold without affecting the stability and without lengthening the period of the galvanometer. It was also possible to lengthen or to shorten the period of oscillation.

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References

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Authors and Affiliations

  1. Department of Experimental Physics, University of Budapest, Budapest, Hungary

    P. Selényi

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  1. P. Selényi
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Selényi, P. Galvanometers with photoelectric feed-back. Hungarica Acta Physica 1, 1–8 (1947). https://doi.org/10.1007/BF03159699

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  • DOI: https://doi.org/10.1007/BF03159699

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