Adjustable oscillator
AssigneeNokia Corporation
InventorsKalle Asikainen, Pauli Seppinen
Life of this patent
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Abstract
The invention relates to a method for tuning an adjustable oscillator, in which oscillator at least one resonance circuit is used. The frequency of the oscillator is adjusted by changing the resonance frequency of the at least one resonance circuit by means of a control signal for which a minimum value and a maximum value are selected. In the method at least one target value is selected for the control signal, the frequency of the adjustable oscillator is adjusted to substantially correspond to the target value and the value of the control signal and the target value are compared. When the value of the control signal is substantially different from the target value, a tuning signal is produced to change the resonance frequency of the at least one resonance circuit.
Claims15
A method for tuning an adjustable oscillator, in which oscillator at least one resonance circuit is used, and the frequency of the oscillator is adjusted by changing the resonance frequency of said at least one resonance circuit by means of a control signal, for which a minimum value and a maximum value are selected, at least one target value is selected for the control signal, the frequency of the adjustable oscillator is set to substantially correspond to said target value, and said value of the control signal and the target value are compared, and when the value of the control signal is substantially different from the target value, a tuning signal is produced to change the resonance frequency of said at least one resonance circuit.
An adjustable oscillator, which comprises at least one resonance circuit, means for controlling the frequency of said oscillator by changing the resonance frequency of said at least one resonance circuit by means of a control signal, for which a minimum value and a maximum value are selected, and means for tuning the oscillator which comprise means for producing at least one target value of the control signal, means for setting the frequency of the adjustable oscillator to substantially correspond to said target value and comparing said value of the control signal and the target value, and the oscillator also comprises means for producing a tuning signal to change the resonance frequency of said at least one resonance circuit when the value of the control signal is substantially different from the target value.
An electronic device, which comprises an adjustable oscillator which contains at least one resonance circuit, means for controlling the frequency of said oscillator by changing the resonance frequency of said at least one resonance circuit by means of a control signal, for which a minimum value and a maximum value are selected, and means for tuning the oscillator, which comprise means for producing at least one target value of the control signal, means for setting the frequency of the adjustable oscillator to substantially correspond to said target value and comparing said value of the control signal and the target value, and the electronic device also comprises means for producing a tuning signal to change the resonance frequency of said at least one resonance circuit when the value of the control signal is substantially different from the target value.
A wireless communication device, which comprises an adjustable oscillator which contains at least one resonance circuit, means for adjusting the frequency of said oscillator by changing the resonance frequency of said at least one resonance circuit by means of a control signal for which a minimum value and a maximum value are selected, and means for tuning the oscillator, which comprise means for producing at least one target value of the control signal, means for setting the frequency of the adjustable oscillator to substantially correspond to said target value and comparing said value of the control signal and the target value, and the wireless communication device also comprises means for producing a tuning signal to change the resonance frequency of said at least one resonance circuit when the value of the control signal is substantially different from the target value.
Dependencies are inferred from the claim text.