EP 1669821 B1 20110302 - Driving method of a vibrating device for a portable object, with a coil and a moving mass
Title (en)
Driving method of a vibrating device for a portable object, with a coil and a moving mass
Title (de)
Verfahren zum Antrieb einer Schwingungsvorrichtung für ein tragbares Gerät, mit einer Spule und einer bewegbaren Masse
Title (fr)
Procédé d'entrainement d'un dispositif vibrant pour un objet portable, qui comprend une bobine et une masse mobile
Publication
Application
Priority
- EP 04106436 A 20041209
- EP 05111845 A 20051208
Abstract (en)
[origin: EP1669821A1] The method involves providing rectangular voltage pulses of alternate polarity without interruption between each pulse, to a coil of a vibrating device, with the help of a driving circuit (1). Width of the pulses are modulated in a similar manner during successive oscillation periods in order to define a sinusoidal voltage wave of determined amplitude whose fundamental frequency is adapted to resonant frequency of mobile mass.
IPC 8 full level
G04G 13/02 (2006.01); G08B 6/00 (2006.01)
CPC (source: EP)
G04G 21/00 (2013.01); G08B 6/00 (2013.01)
Designated contracting state (EPC)
CH DE FI FR LI
DOCDB simple family (publication)
DOCDB simple family (application)
EP 05111845 A 20051208