Circuits and methods for generating an oscillator signal

An oscillator circuit comprising:

• a digitally controlled oscillator (DCO) configured to generate an oscillator output signal at a first frequency;
• a digital feedback circuit configured to receive the output signal and output a feedback signal, wherein the DCO is configured to receive the feedback signal, and wherein the first frequency of the output signal is based at least in part on a value of the feedback signal;
• and
• wherein the digital feedback circuit is configured to, in response to a control instruction:
• measure the first frequency of the output signal;
• and
• adjust the value of the feedback signal to reduce an error between the first frequency and a target frequency.

A method of generating an oscillator output signal, the method comprising:

• generating, based on a frequency control signal, an oscillator output signal, the frequency control signal comprising a first frequency control value, wherein the output signal is generated at a first frequency in response to the first frequency control value of the frequency control signal, wherein the first frequency is dependent on, or based at least in part on, a value of a first feedback signal;
• and
• in response to a first control instruction:
• measuring the first frequency of the output signal;
• and
• adjusting the value of the first feedback signal to reduce an error between the first frequency and a first target frequency.

A method of generating an oscillator output signal, the method comprising:

• generating, based on a feedback signal, an oscillator output signal at a first frequency, wherein the first frequency of the output signal is based at least in part on a value of the feedback signal;
• and
• in response to a control instruction:
• measuring the first frequency of the output signal;
• and
• adjusting the value of the feedback signal to reduce an error between the first frequency and a target frequency.