Digital resolution translator

A method of generating an output waveform, comprising the steps of:

• receiving an input frequency;
• receiving a desired output frequency and incrementing an integer counter for each pulse of said desired output frequency;
• calculating a feedback signal by adding the count from said integer counter to a fractional portion, wherein said fractional portion is substantially equal to a count of a high speed digital counter divided by a compensated nominal output from a previous loop cycle;
• scaling said input frequency and comparing said scaled input frequency to said feedback signal to find a loop error value;
• applying a compensation to said loop error value, resulting in a compensated loop error;
• adding said compensated loop error to a predetermined nominal output and storing said value as a current compensated nominal output frequency;
• repeating all of the above steps until said count of said high speed digital counter equals said current compensated nominal output frequency;
• sending a signal to imaging circuitry to produce an output at said compensated nominal output frequency;
• resetting said count of said high speed digital counter to zero;
• storing said current compensated nominal output frequency for use in a next loop cycle;
• and
• repeating all of the above said steps.

A digital resolution translator, comprising:

• an encoder for generating an input frequency;
• a complex programmable logic device for receiving said input frequency;
• a digital signal processor in communication with said complex programmable logic device operable to translate said input frequency to an adjusted output frequency based upon signals from said complex programmable logic device;
• a buffer for storing transitions in said input frequency and said signals from said complex programmable logic device;
• and
• an output to imaging circuitry operable to allow said imaging circuitry to receive said adjusted output frequency.

A method of generating an output waveform, comprising the steps of:

• measuring an input waveform frequently by incrementing an input waveform counter for each pulse of said input waveform;
• measuring an output waveform frequency by incrementing an output waveform counter for each pulse of said output waveform;
• scaling said output waveform counter to obtain a scaled output waveform value;
• comparing said measured input waveform with said scaled output waveform to obtain a loop error value;
• using said loop error value to generate said output waveform;
• and
• repeating said steps such that said output waveform frequency has a non-integer relationship to said input waveform frequency.