Nokia Corporation

Nokia Technologies Oy

Nokia Siemens Networks Oy

Olli Jaakkola

Aarne Oja

Tomi Juha Mattila

Heikki Seppä

Heikki Seppā

Ville Kaajakari

Tomi Mattila

Method for stabilizing the frequency of a MEMS (Micro Electro Mechanical Systems) reference oscillator, and a MEMS reference oscillator, wherein the method comprises following steps: using two or more MEMS components, wherein each MEMS component is characterized by a set of properties, and selectively combining the desired properties from the MEMS components.

Reference oscillator frequency stabilization

Method for stabilizing the frequency of a frequency synthesizer by means of a reference oscillator unit coupled to a voltage controlled oscillator (VCO) and a frequency synthesizer, wherein the synthesizer is provided with a phase locked loop (PLL) to stabilize the operation of the voltage controlled oscillator, wherein the reference oscillator unit is a MEMS (MicroElectromechanicalSystems) reference oscillator unit, the temperature of the MEMS reference oscillator unit is measured, and the output frequency is corrected according to the measured temperature by using a frequency/temperature function.

Multi-mode frequency synthesizer with temperature compensation

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Helsinki, Finland

Olli Jaakkola