Nokia Mobile Phones Limited

Ellego Powertec Oy

Terho Otso Tapio Kaikuranta

Seppo Salminen

Jari Nurmi

Jari Kalervo Nurmi

The invention relates to power supply systems. There is provided an apparatus and a method for supplying electric power to an electric device. In the method an indication of a desired power level to be supplied to the electric device is obtained. Electric power is received as DC power by a constant current regulator unit, which inverts the DC power to AC power and supplies the AC power to a reactance (T) to be transformed to an output power. The output power is supplied from the reactance (T) to the electric device. The method further comprises adjusting the AC power supplied to the reactance (T) by using at least two of the following:

Power supply system

An electromechanical data input mechanism comprises a first structural entity , having a first surface and a conductive coupling area on said first surface, and a second structural entity having a second surface located adjacent to said first surface and separated therefrom by a gap. It further comprises a dome-like member adjacent to said conductive coupling area, and extending from the second surface, an actuator adjacent to the dome-like member. The mechanism is characterized in that within an pressing area elastic properties of the second structural entity are substantially uniform and said first and second structural entities are kept apart from each other solely through the dome-like members, and said first and second structural entities are arranged to move with respect to each other so that under the influence of a force pressing them towards each other, the actuator moves towards the dome-like member.

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Piispanristi, Finland

Terho Otso Tapio Kaikuranta