US4075569A — Digital method and apparatus for dynamically gene…

Claim 1

Independent Claim 197 words

Digital apparatus for dynamically generating an output pulse train in response to an input pulse train, comprising: inititate circuit means for receiving the input pulse train and providing an initiate signal upon the transpiration of a predetermined period of time following the inception of each input pulse; pulse generator means connected to said initiate circuit means for providing the output pulse train, each pulse thereof being initiated in response to an initiate signal and being terminated in response to a terminate signal; duty cycle control means for receiving the input pulse train and connected to said initiate circuit means for 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 initiate signal, and terminate circuit means for receiving the input pulse train and connected to said duty cycle control means for generating said terminate signal upon the earlier completion of said digital counting interval traversal or the input cyclical period during which it begins.

Claim 2

Dependent Claim 197 words

Digital apparatus for dynamically generating an output pulse train in response to an input pulse train, comprising: inititate circuit means for receiving the input pulse train and providing an initiate signal upon the transpiration of a predetermined period of time following the inception of each input pulse; pulse generator means connected to said initiate circuit means for providing the output pulse train, each pulse thereof being initiated in response to an initiate signal and being terminated in response to a terminate signal; duty cycle control means for receiving the input pulse train and connected to said initiate circuit means for 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 initiate signal, and terminate circuit means for receiving the input pulse train and connected to said duty cycle control means for generating said terminate signal upon the earlier completion of said digital counting interval traversal or the input cyclical period during which it begins.

Claim 3

Dependent Claim 50 words

The apparatus of claim 1 including means for rendering said terminate circuit means responsive to the transpiration of said predetermined period of time following the termination of an input pulse in lieu of said digital counting interval traversed whenever said traversal is completed during the presence of an input pulse.

Claim 4

Dependent Claim 44 words

The apparatus of claim 2 wherein said duty cycle control means comprises a first counter for providing a digital count indicative of each input cyclical period and a second counter connected thereto for receiving said digital count prior to traversing said digital counting interval.

Claim 5

Dependent Claim 67 words

The apparatus of claim 3 wherein said predetermined percentage has a value of 58% and said duty cycle control means includes a source of clock pulses for driving both of said counters, means connected thereto for driving said second counter at a frequency twice that of said first counter and means also connected thereto for omitting every seventh clock pulse from being applied to said second counter.

Claim 6

Dependent Claim 45 words

The apparatus of claim 4 wherein said seventh clock pulse omitting means comprises a 3-state maxi-length counter and decoding means connected thereto for identifying one of its seven unique states to inhibit the application of the seventh clock to said second counter at that time.

Claim 7

Dependent Claim 44 words

The apparatus of claim 2 wherein said terminate circuit means includes means for generating said terminate signal upon the earlier completion of the first input cyclical period or the transpiration of a fixed period of time following the initiation of the first output pulse.

Claim 8

Dependent Claim 52 words

The apparatus of claim 6 including means connected to said initiate circuit means for rendering said terminate circuit means responsive to the transpiration of the first input pulse in lieu of said transpiration of a fixed period of time whenever said fixed period expires during the presence of the first input pulse.

Claim 9

Dependent Claim 164 words

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.

Claim 10

Dependent Claim 164 words

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.

Claim 11

Dependent Claim 135 words

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.

Claim 12

Dependent Claim 135 words

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.

Claim 13

Dependent Claim 48 words

The method of claim 9 including generating said terminate signal in response to the transpiration of said predetermined period of time following the termination of an input pulse in lieu of said digital counting interval traversal whenever said traversal is completed during the presence of an input pulse.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-02-20	1981-08-22	1982-02-21	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-02-20	1985-08-22	1986-02-21	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-02-20	1989-08-22	1990-02-21	$7700.00	Window Closed / Lapsed

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

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