Apparatus and method for the calibration of delta-sigma modulators
AssigneeUbidyne, Inc.
InventorsUdo Karthaus, Stephan Ahles
Life of this patent
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Abstract
The application relates to a calibration apparatus and calibration method for a tuneable resonator of a delta-sigma modulator of the continuous time, band pass type. The calibration apparatus comprises: a resonator driver capable of causing an oscillating behaviour in a resonator output signal, a reference signal source that provides a reference signal, a frequency detector that provides a frequency relation signal corresponding to the frequency relation between the resonator output signal and the reference signal, and a controller that controls the tuneable resonator in dependence from the frequency relation signal so as to reduce frequency deviation.
Claims13
A calibration apparatus for a tuneable resonator of a delta-sigma modulator of the continuous time, band pass type, wherein the calibration apparatus comprises:
- a resonator driver capable of causing an oscillating behaviour in a resonator output signal,
- a reference signal source that provides a reference signal,
- a frequency detector that provides a frequency relation signal corresponding to the frequency relation between the resonator output signal and the reference signal, and
- a controller that controls the tuneable resonator in dependence from the frequency relation signal so as to reduce frequency deviation.
A delta-sigma modulator of the continuous-time, band pass type, comprising a tuneable resonator and a calibration apparatus for a tuneable resonator of a delta-sigma modulator of the continuous time, band pass type, wherein the calibration apparatus comprises:
- a resonator driver capable of causing an oscillating behaviour in a resonator output signal,
- a reference signal source that provides a reference signal,
- a frequency detector that provides a frequency relation signal corresponding to the frequency relation between the resonator output signal and the reference signal, and
- a controller that controls the tuneable resonator in dependence from the frequency relation signal so as to reduce frequency deviation.
A computer program product embodied on a computer-readable medium and comprising executable instructions for the manufacture of the calibration apparatus for a tuneable resonator of a delta-sigma modulator of the continuous time, band pass type, wherein the calibration apparatus comprises:
- a resonator driver capable of causing an oscillating behaviour in a resonator output signal,
- a reference signal source that provides a reference signal,
- a frequency detector that provides a frequency relation signal corresponding to the frequency relation between the resonator output signal and the reference signal, and
- a controller that controls the tuneable resonator in dependence from the frequency relation signal so as to reduce frequency deviation.
A method for calibrating a tuneable resonator of a delta-sigma modulator of the continuous time, band pass type, wherein the method comprises:
- causing a tuneable resonator output signal to oscillate at an oscillation frequency of the resonator;
- providing a reference signal having a desired frequency or a fraction thereof;
- detecting a frequency deviation between the oscillation frequency and the desired frequency or the fraction thereof;
- controlling the tuneable resonator in dependence from the frequency deviation signal so as to reduce frequency deviation.
Dependencies are inferred from the claim text.