Coherent direct digital synthesizer.

摘要

A coherent direct digital waveform synthesizer, capable of generating a waveform in response to a decimally or other non-binary related reference frequency while obtaining the advantages of the use of a binary radix phase accumulator generating binary addresses for a waveform memory. The interface between these elements includes a frequency converter including a voltage controlled oscillator (22) and a further binary radix phase accumulator (23) in the feedback path of a phase locked loop (20). A binary radix related digital waveform synthesizer may be thus made to produce non-binary related frequency waveforms coherent with a non-binary radix reference frequency source, and of decimal or other non-binary radix related resolution.