Self-calibrating time code generator

A self-calibrating time code generator for generating an accurate digital IRIG waveform suitable for timing use by a device, the time source comprising:

• a phase-locked loop configured to provide a generated output signal based on a phase difference between a time reference signal and an input signal;
• an IRIG encoder configured to couple a present time value with the generated output signal to form a digital IRIG waveform;
• and
• a dynamic delay compensator operatively coupled to the phase-locked loop and configured as a separate feedback control path from the phase-locked loop to provide the input signal based on the generated output signal and the digital IRIG waveform, wherein the input signal includes a time delay, the time delay causing the phase-locked loop to time-align the digital IRIG waveform with the time reference signal to form the accurate digital IRIG waveform.

A self-calibrating time code generator for generating an accurate analog IRIG waveform suitable for timing use by a device, the self-calibrating time code generator comprising:

• a phase-locked loop configured to provide a generated output signal based on a phase difference between a time reference signal and an input signal;
• an IRIG encoder configured to couple a present time value with the generated output signal to form a digital IRIG waveform;
• a plurality of analog components operatively coupled to the IRIG encoder and configured to transform the digital IRIG waveform to a conditioned analog IRIG waveform;
• a delay difference indicator operatively coupled to the phase-locked loop and configured to provide a time interval value based on a comparison of corresponding pulse edges of the generated output signal and an IRIG edge-arrival time waveform formed from the conditioned analog IRIG waveform;
• and
• a numerical delay component operatively coupled to the phase-locked loop and configured to delay the generated output signal by the time interval value to form the input signal, receipt of the input signal by the phase-locked loop causing the generated output signal to lead the time reference signal by the time interval value to time-align the conditioned analog IRIG waveform with the time reference signal to form the accurate analog IRIG waveform.