Phase noise tolerant sampling

A system comprising:

• a series interconnection of a plurality of delay elements, wherein a first delay element of the series interconnection receives a first timing signal at an input, and each delay element of the series interconnection has a first delay period and is coupled to a control signal;
• a plurality of latches, wherein each latch of the plurality of latches has an input connected to an output of a respective delay element of the series interconnection, and each latch of the plurality of latches receives a second timing signal at a clock input;
• and
• circuitry configured to selectively adjust the control signal coupled to the delay elements of the first series interconnection based on an output of the plurality of latches.

A system comprising:

• a frequency stabilizer receiving a first reference clock at an input, and producing a frequency-stabilized signal at an output;
• a phase noise measurement unit respectively receiving at first and second inputs a second reference clock and the frequency-stabilized signal, the phase noise measurement unit configured to produce a phase noise signal indicative of phase noise between the second reference clock and the frequency-stabilized signal;
• and
• a sampling circuit configured to convert a first data signal into a second data signal, wherein the sampling circuit receives the frequency-stabilized signal and the phase noise signal, and converts the first data signal into the second data signal based on the frequency-stabilized signal and the phase noise signal.

A method comprising steps of:

• generating a PLL clock signal in a phase-locked loop (PLL) receiving an oscillator clock signal;
• measuring a phase between the PLL clock signal and the oscillator clock signal;
• comparing the measured phase with a baseline phase, and producing a phase noise signal indicative of the difference between the measured phase and the baseline phase;
• converting a first data signal into a second data signal using the PLL clock signal and the phase noise signal.