Oscillator arrangement with improved phase-noise properties
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJan Sandberg, Daniel Sjöberg, Bengt Madeberg, Mikael Hörberg
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Abstract
The present disclosure relates to oscillator arrangement comprising an output port adapted to output an output signal with an output frequency (fout), an in loop oscillator that is adapted for an in loop oscillator frequency (fosc) and an additional oscillator that is adapted for an additional oscillator frequency (foscA). The output frequency (fout): exceeds the in loop oscillator frequency (fosc) and the additional oscillator frequency (foscA), is dependent on both the in loop oscillator frequency (fosc) and the additional oscillator frequency (foscA), and is adapted to control the in loop oscillator frequency (fosc) via a feed-back loop.
Claims20
An oscillator arrangement comprising:
- an output port configured to output an output signal with an output frequency (fout);
- an in loop oscillator that is configured for an in loop oscillator frequency (fosc);
- an additional oscillator that is configured for an additional oscillator frequency (foscA), the output frequency (fout):
- exceeding the in loop oscillator frequency (fosc) and the additional oscillator frequency (foscA);
- being dependent on both the in loop oscillator frequency (fosc) and the additional oscillator frequency (foscA);
- and
- being configured to control the in loop oscillator frequency (fosc) via a feed-back loop;
- a mixer configured to multiply an output of the in loop oscillator by an output of the additional oscillator to produce an output that includes the output frequency (fout);
- a feedback filter in the feedback loop connected to the output of the mixer and configured to filter the signal delivered to the feedback loop;
- and
- an output filter connected to the output of the mixer to filter out harmonics from the output of the mixer and to output the output frequency (fout).
A method for configuring an oscillator arrangement, the method comprising:
- providing an output port adapted to output an output signal with an output frequency (fout);
- providing an in loop oscillator that is adapted for an in loop oscillator frequency (fosc);
- and
- providing an additional oscillator that is adapted for an additional oscillator frequency (foscA), the output frequency (fout):
- exceeding the in loop oscillator frequency (fosc) and the additional oscillator frequency (foscA);
- being dependent on both the in loop oscillator frequency (fosc) and the additional oscillator frequency (foscA);
- and
- being used for controlling the in loop oscillator frequency (fosc) via a feed-back loop;
- and
- providing a mixer configured to multiply an output of the in loop oscillator by an output of the additional oscillator to produce an output that includes the output frequency (fout);
- providing a feedback filter in the feedback loop connected to the output of the mixer and configured to filter the signal delivered to the feedback loop;
- and
- providing an output filter connected to the output of the mixer to filter out harmonics from the output of the mixer and to output the output frequency (fout).
Dependencies are inferred from the claim text.