Phonak Ag

Csem Centre Suisse D'electronique Et De Microtechnique Sa - Recherche Et

Enrique Marcello Blumenkrantz

Erik Witthoefft Rasmussen

Olivier Nys

The present invention relates to a method to generate at least a supply voltage to supply energy to a hearing device, whereas the ratio between the supply voltage and the source voltage is adjustable. The hearing device substantially comprises a source (Q), at least a switching element (S , . . . , Sn), at least an energy transfer element (EUE), at least an energy storing element (ES), a load (Z) and a control unit (CTRL), whereas the method consists in that, in a first step, the control unit (CTRL) acts on the switching elements (S . . . , Sn), such that energy is transferred from the source (Q) to the energy transfer elements (EUE), that, in a second step, the control unit (CTRL) acts on the switching elements (S . . . , Sn), such that at least a part of the energy stored in the energy transfer elements (EUE) is transferred to the energy storing elements (ES) to build a supply voltage across the load (Z).

Method and apparatus for the supply of energy to a hearing device

The present invention relates to a method to generate at least a supply voltage to supply energy to a hearing device, whereas the ratio between the supply voltage and the source voltage is adjustable. The hearing device substantially comprises a source (Q), at least a switching element (S,, . . . , Sn), at least an energy transfer element (EUE), at least an energy storing element (ES), a load (Z) and a control unit (CTRL), whereas the method consists in that, in a first step, the control unit (CTRL) acts on the switching elements (S,, . . . , Sn), such that energy is transferred from the source (Q) to the energy transfer elements (EUE), that, in a second step, the control unit (CTRL) acts on the switching elements (S,, . . . , Sn), such that at least a part of the energy stored in the energy transfer elements (EUE) is transferred to the energy storing elements (ES) to build a supply voltage across the load (Z).

The invention concerns a processing circuit (2, 120) for producing a variable output signal in response to a variable quantity picked up or received as input. The processing circuit is associated with a stage or has an input sensor (4, 100) furnishing a signal with a variable amplification/attenuation factor, and further exhibits response characteristics which depend in particular from state variables. The processing circuit includes a suppression circuit (FIG. 5, FIG. 6) for suppressing transients normally produced by modification of the amplification/attenuation factor, this suppression circuit functioning by modifying the value of the state variables in direct proportion to the modification of the amplification/attenuation factor.

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Neuchatel, Switzerland

Enrique Marcello Blumenkrantz