Patent ID: 8742960

Claim:
A phase digitizing system, comprising: an analog-to-digital converter configured to generate a plurality of sample segments of digital signal waveform samples based on an analog composite input signal received in a measurement channel, the composite input signal comprising a first signal having a first frequency F1 and a second signal imported from a reference channel having a second frequency F2; a plurality of phase accumulators; and a processing device coupled to the plurality of phase accumulators, and configured to digitally process each sample segment with outputs of the plurality of phase accumulators and to continually generate digital phase data, wherein the processing device is further configured to provide increment values to each of the phase accumulators based on the digital phase data, causing an output of a first phase accumulator to represent an instantaneous phase of the first signal, and an output of a second phase accumulator to represent an instantaneous phase of the second signal.