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It is commonly seen in analog power amplifiers at the output of the driver stage, just before the output inductor. The speaker coil inductance of a loudspeaker generates a rising impedance, which is worsened by the output inductor generally found in analog power amplifiers; the cell is used to limit
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Bell Labs
Journal: Zobel, O. J., "Theory and Design of Uniform and Composite Electric Wave Filters", Bell Sys. Tech. J., Vol. 2, pp. 1–46, Jan 1923.
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Additionally, Boucherot cells are sometimes used across the bass driver (and mid-range) of a speaker system, in order to maintain a more constant
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The documentation for some power operation amplifiers suggests the use of a "Boucherot cell between outputs and ground or across the load".
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Some loudspeaker crossover designs aim to stabilize impedance at high frequencies by including Zobel networks.
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to damp high-frequency oscillations that might occur in the absence of loads at high frequencies. Named after
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as "seen" by a passive crossover. In this specific arrangement, the
Boucherot cell is part of a
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for a more general description of telecommunications usage.
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in series, usually placed across a load for stability.
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55:a Boucherot cell typically consists of a
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