Patent
Device for generating low-frequency magnetic fields
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TLDR
In this article, an adjustable, variable-frequency oscillator was used to generate low-frequency magnetic fields for therapeutic purposes, with a control signal cyclically scaled down in a gate downstream of the oscillator.Abstract:
Device for generating low-frequency magnetic fields for therapeutic purposes, having an adjustable, variable-frequency oscillator. The oscillator generates a control signal at a frequency of between 1.5 and 13 Hz. The control signal is cyclically scaled down in a gate downstream of the oscillator, thus producing working and rest periods of the device. The duration of these periods varies as a function of the oscillator frequency between 2 to 3 and 18 to 22 seconds. The control signal is applied to a power stage which generates an alternating current which alternates with the oscillator frequency and feeds a magnet coil. The magnet coil can freely emit the magnetic field, and the connection of an electrically conductive blanket is possible in an alternative operating state.read more
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References
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Apparatus for producing magnetic pulses
TL;DR: In this article, an astable multivibrator (M2) with two capacitors (C2, C3) which can be switched individually into the feedback path for alternate production of frequencies in the alpha wave range and in the theta wave range of the EEG was presented.