Is a
Patent attributes
Patent Applicant
Patent Jurisdiction
Patent Number
Date of Patent
August 28, 2018
Patent Application Number
15461422
Date Filed
March 16, 2017
Patent Citations Received
Patent Primary Examiner
Patent abstract
A personal hygiene device has a resonant motor and a motor control unit for applying a periodic voltage signal with a driving frequency at the resonant motor for driving the resonant motor into an oscillating motion with an oscillating frequency equal to the driving frequency. The motor control unit comprises a synthesizer circuit for digitally synthesizing the periodic voltage signal from voltage pulses of variable length provided with a pulse frequency higher than the driving frequency such that at least two voltage pulses are applied at least in one of two half cycles of each period of the periodic voltage signal.
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