Frequency-regulated oscillator circuit
AssigneeNXP USA, Inc.
InventorsPragya Priya Malakar, John Pigott
Life of this patent
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Abstract
Oscillator circuitry and methods of operation thereof are provided in which the oscillator circuitry includes at least a first oscillator, a second oscillator, and a lock detector. The first oscillator is configured to generate a first clock signal. The second oscillator is configured to generate a second clock signal. The lock detector is configured to detect a stable phase lock between the first clock signal and the second clock signal and to switch an output of the oscillator circuitry from the first clock signal to the second clock signal in response to detecting the stable phase lock.
Claims20
Oscillator circuitry comprising:
- a first oscillator configured to generate a first clock signal;
- a second oscillator configured to generate a second clock signal;
- and
- a lock detector configured to:
- detect a stable phase lock between the first clock signal and the second clock signal;
- and
- switch an output of the oscillator circuitry from the first clock signal to the second clock signal in response to detecting the stable phase lock.
A method operating oscillator circuitry, the method comprising:
- generating, by a first oscillator of the oscillator circuitry, a first clock signal;
- generating, by a second oscillator of the oscillator circuitry, a second clock signal;
- detecting, by a lock detector, a stable phase lock between the first clock signal and the second clock signal;
- and
- switching an output of the oscillator circuitry from the first clock signal to the second clock signal in response to detecting the stable phase lock.
Dependencies are inferred from the claim text.