Oscillator arrangement
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsHarald Jacobsson, Mikael Andreasson, Kjell Larsson
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Abstract
The present invention relates to an oscillator arrangement, arranged for providing an oscillator output and phase noise detection and/or control of said oscillator output, the arrangement comprising a mixer (1) connected to a low-pass filter (2). The oscillator arrangement comprises a first oscillator (7) and a second oscillator (8), where the oscillators (7, 8) are inter-injection locked to each other by means of at least one coupling element (Q) in such a way that the oscillator output is acquired in quadrature automatically. The present invention also relates to a corresponding method.
Claims23
An oscillator arrangement arranged for providing an oscillator output and phase noise detection and/or control of said oscillator output, the oscillator arrangement comprising:
- a mixer;
- a low-pass filter connected to the mixer;
- a first oscillator;
- a second oscillator;
- and
- a phase noise measurement arrangement coupled to the low-pass filter and configured to produce a signal based on the output of the low-pass filter for use in producing a feedback signal for controlling the first and second oscillators, wherein
- the first and second oscillators are inter-injection locked to each other by at least one coupling element in such a way that the oscillator output is acquired in quadrature automatically, and
- the mixer, low-pass filter, oscillators, coupling element, and phase noise measurement arrangement are realized on a single chip.
A method for detecting and/or controlling phase noise from an oscillator arrangement comprising a first oscillator and a second oscillator, wherein the oscillators are inter-injection locked to each other by at least one coupling element in such a way that an output in quadrature is acquired automatically, wherein said output in quadrature is connected to a mixer connected to a low-pass filter, comprising:
- using a phase noise measurement arrangement connected to the low-pass filter to produce a feedback signal;
- using the feedback signal to control the oscillators, wherein
- the first oscillator, the second oscillator, the coupling element, the mixer, the low pass filter, and the phase noise measurement arrangement are realized on a single chip.
Dependencies are inferred from the claim text.