Patent ID: 8914909

Claim:
An electronic frequency measuring and control apparatus, comprising: an oscillating element; an oscillation sensor to sense oscillation of the oscillating element and generate an analog oscillation signal corresponding to the sensed oscillation of the oscillating element; an analog-to-digital converter in communication with the oscillation sensor to convert the analog oscillation signal to a digital oscillation signal; and a phase locked loop to compare the digital oscillation signal from the analog-to-digital converter with a digital reference oscillation signal and generate a digital phase difference signal; and a plurality of oscillators in parallel downstream communication with the phase locked loop to receive the digital phase difference signal, wherein the oscillators include a plurality of phase accumulators to generate a plurality of digital phase signals for a corresponding plurality of channels and a plurality of phase-to-amplitude converters downstream of the phase accumulators to convert the plurality of digital phase signals into a plurality of digital amplitude signals for the corresponding plurality of channels; wherein the phase locked loop and the plurality of oscillators are defined by a single programmable logic device in communication with the analog-to-digital converter and configured to apply a plurality of channel-specific synchronization factors to the digital phase difference signal upstream of the phase accumulators.