Abstract: A voltage controlled oscillator implements optimising its effective frequency versus voltage transfer function by generating and applying a frequency control signal via a function having a plateau region and a higher slope region, where a horizontal position of the higher slope region, a slope value in the higher slope region, and a function value change magnitude over the higher slope region are adjustable.

Abstract: An oscillator includes resonator portions each mounted to a substrate via one or more mountings at one end and having an active resonance region defined between a set of electrodes. Each resonator portion has a longitudinal axis directed along the resonator portion from the mounted end to a free end. The resonator portions are mounted such that their longitudinal axes are directed in different directions, e.g. an anti-parallel arrangement, so that acceleration sensitivity vector components aligned with the longitudinal axis cancel each other out.

Abstract: This invention relates to an oscillator having reduced sensitivity to acceleration. The oscillator includes a plurality of asymmetrically mounted resonator portions each having an active resonance region. The asymmetric mounting of the resonator portions means that each resonator portion has an axis passing through its active resonance region along which the acceleration sensitivity vector is dominant, i.e. the sensitivity to acceleration along the direction defined by one axis is much greater than the sensitivity to acceleration in other directions. The resonators are mounted in an oscillator such that their dominant axes are directed in different directions, e.g. an anti-parallel arrangement, which means that the dominant acceleration sensitivity vectors can cancel each other out.

Abstract: This invention relates to an oscillator having reduced sensitivity to acceleration. The oscillator includes a plurality of asymmetrically mounted resonator portions each having an active resonance region. The asymmetric mounting of the resonator portions means that each resonator portion has an axis passing through its active resonance region along which the acceleration sensitivity vector is dominant, i.e. the sensitivity to acceleration along the direction defined by one axis is much greater than the sensitivity to acceleration in other directions. The resonators are mounted in an oscillator such that their dominant axes are directed in different directions, e.g. an anti-parallel arrangement, which means that the dominant acceleration sensitivity vectors can cancel each other out.

Abstract: A method provides a temperature controlled frequency source. The method reduces the effects of temperature variations on an operating frequency of the temperature controlled frequency source by temperature compensating the temperature controlled frequency source. The temperature-controlled frequency source may be an Oven-Controlled crystal oscillator (DCXO) and the temperature-controlled frequency source may be a TCXO ASIC. Analago temperature compensation may be provided by generating zero to fourth-order polynomial Chebyshev functions of temperature.

Abstract: A method provides a temperature controlled frequency source. The method reduces the effects of temperature variations on an operating frequency of the temperature controlled frequency source by temperature compensating the temperature controlled frequency source.