Low-noise oscillator amplitude regulator

A method of controlling an oscillator comprising an oscillator output, a first control input, and a second control input, the method comprising:

• detecting an amplitude of the oscillator output;
• controlling the amplitude of the oscillator output, responsive to the detected amplitude, by continuously applying a first control signal to the first control input;
• and
• controlling one or more amplitude regulating parameters of the oscillator by controlling a second control signal applied to the second control input to:
• prevent the one or more amplitude regulating parameters of the oscillator from changing when the oscillator powers on;
• and
• allow the one or more amplitude regulating parameters of the oscillator to change responsive to the detected amplitude after the oscillator powers on and stabilizes.

A wireless communication device comprising a frequency generation circuit, said frequency generation circuit comprising:

• an oscillator comprising an oscillator output, a first control input, and a second control input;
• a detector configured to detect an amplitude of the oscillator output;
• a first feedback path operatively connecting the detector to the first control input, the first feedback path configured to control the amplitude of the oscillator output responsive to the detected amplitude by applying a first control signal to the first control input;
• and
• a second feedback path operatively connecting the detector to the second control input, the second feedback path comprising a control circuit configured to control a second control signal to:
• prevent one or more amplitude regulating parameters of the oscillator from changing when the oscillator powers on;
• and
• allow the one or more amplitude regulating parameters of the oscillator to change responsive to the detected amplitude after the oscillator powers on and stabilizes.