Self-injection locking for low-power low-phase noise oscillators
First Claim
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1. A method of producing a clock signal, the method comprising:
- a) producing, using an oscillator, a signal having a base frequency component and an Nth harmonic component, wherein N is an integer, and N>
1;
b) filtering the signal through a bandpass filter, in which the bandpass filter has Q factor ≥
5 and passes the Nth harmonic component as a filtered Nth harmonic component; and
c) injecting the filtered Nth harmonic component into the oscillator to self-injection lock the base frequency of the signal.
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Abstract
For producing a low-power, low-phase noise oscillating signal using a self-injection locking oscillator, examples include: producing, using an oscillator, a signal having a base frequency component and an Nth harmonic component, in which N is a selected integer and N>1; filtering the signal through a bandpass filter with Q factor ≥5, the filter configured to pass the Nth harmonic component as a filtered Nth harmonic component; and injecting the filtered Nth harmonic component into the oscillator to self-injection lock the base frequency of the signal.
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Citations
20 Claims
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1. A method of producing a clock signal, the method comprising:
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a) producing, using an oscillator, a signal having a base frequency component and an Nth harmonic component, wherein N is an integer, and N>
1;b) filtering the signal through a bandpass filter, in which the bandpass filter has Q factor ≥
5 and passes the Nth harmonic component as a filtered Nth harmonic component; andc) injecting the filtered Nth harmonic component into the oscillator to self-injection lock the base frequency of the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A self-injection locking clock circuit, comprising:
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a) an oscillator configured to output a periodic signal with at least a base frequency and configured to injection lock to an injected signal; and b) a bandpass filter having Q factor ≥
5, the bandpass filter configured to pass an Nth harmonic of the base frequency to output a filtered Nth harmonic, N being an integer at least partially dependent on the base frequency, in which N>
1, and the bandpass filter is operatively coupled to the oscillator and configured to filter the periodic signal to inject the filtered Nth harmonic into the oscillator. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification