Digital method and apparatus for dynamically generating an output pulse train having a desired duty cycle from an input pulse train

Digital apparatus for affording a 58% duty cycle from a pulse train comprising:

• a source of clock pulses;
• a divide by two circuit connected to said source;
• a first counter connected to said divide by two circuit for providing a digital count of said clock pulses received via said divide by two circuit corresponding to a digital counting interval during each cyclical period of the pulse train;
• a second counter;
• means connected to said first counter for loading the digital count achieved at the end of each counting interval into said second counter;
• a 3-state maxi-length counter operated from said clock pulses;
• decoding means connected to said maxi-length counter for identifying one of the seven unique states of said maxi-length counter and generating an inhibit signal in response thereto, and
• grating means connected to said decoding means for passing said clock pulses to said second counter in the absence of said inhibit signal to permit said second count to traverse said digital counting interval.

A digital method for dynamically generating an output pulse train in response to an input pulse train, comprising:

• generating an initiate signal upon the transpiration of a predetermined period of time following the inception of each input pulse;
• initiating an output pulse in resonse to said initiate signal and terminating it in response to a terminate signal;
• digitally measuring each input cyclical period beginning with the leading edge of an input pulse to provide a digital counting interval indicative thereof and during the next successive input cyclical period traversing said digital counting interval in a time corresponding to a predetermined percentage of the measured, cyclical period in response to said inititate signal, and
• generating said terminate signal upon the earlier completion of said digital counting interval or the input cyclical period during which it begins.