Pulse repetition frequency determination system

Claim 1

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; selectively adjustable delay means coupled to said input circuit for delaying said pulses a predetermined amount; selectively adjustable gate pulse generating means coupled to said delay means for generating gate pulses having a predetermined length responsive to the delayed pulses; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 2

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; selectively adjustable delay means coupled to said input circuit for delaying said pulses a predetermined amount; selectively adjustable gate pulse generating means coupled to said delay means for generating gate pulses having a predetermined length responsive to the delayed pulses; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 3

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; delay means coupled to said input circuit for delaying the input pulses by an amount D T - Delta T where D is the time delay, T is the predicted period of the input pulses and Delta T is a period at least one half the duration of one input pulse; gate pulse generating means coupled to said delay means for generating gate pulses having a length 2 Delta T responsive to the delayed pulses, said gate pulses being at least as long as said pulses; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 4

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; delay means coupled to said input circuit for delaying the input pulses by an amount D T - Delta T where D is the time delay, T is the predicted period of the input pulses and Delta T is a period at least one half the duration of one input pulse; gate pulse generating means coupled to said delay means for generating gate pulses having a length 2 Delta T responsive to the delayed pulses, said gate pulses being at least as long as said pulses; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 5

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; gate means coupled to said input circuit for providing a trigger pulse Responsive to an input pulse, said gate means being turned off responsive to reception of an input pulse; delay means coupled to said gate means for delaying the trigger pulses a predetermined amount; gate pulse generating means coupled to said delay means for generating gate pulses having a predetermined length responsive to the delayed pulses, said gate pulse generating means being coupled to said gate means whereby the same is turned on for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 6

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; gate means coupled to said input circuit for providing a trigger pulse Responsive to an input pulse, said gate means being turned off responsive to reception of an input pulse; delay means coupled to said gate means for delaying the trigger pulses a predetermined amount; gate pulse generating means coupled to said delay means for generating gate pulses having a predetermined length responsive to the delayed pulses, said gate pulse generating means being coupled to said gate means whereby the same is turned on for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 7

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; delay means coupled to said input circuit for delaying said pulses a predetermined amount; gate means coupled to said input circuit for providing a trigger pulse responsive to an input pulse, said gate means being turned off responsive to reception of an input pulse; sweep voltage generating means coupled to said gate means for providing a sweep voltage responsive to a trigger pulse; voltage comparator means coupled to said sweep voltage generating means for providing a delayed pulse when said sweep voltage reaches a predetermined level; gate pulse generating means coupled to said voltage comparator means for generating gate pulses having a predetermined length responsive to the delayed pulses, said gate pulse generating means being coupled to said gate means whereby the same is turned on for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and said input circuit for providing an output signal responsive to coincidence of an input pulse and a delayed pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 8

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; delay means coupled to said input circuit for delaying said pulses a predetermined amount; gate means coupled to said input circuit for providing a trigger pulse responsive to an input pulse, said gate means being turned off responsive to reception of an input pulse; sweep voltage generating means coupled to said gate means for providing a sweep voltage responsive to a trigger pulse; voltage comparator means coupled to said sweep voltage generating means for providing a delayed pulse when said sweep voltage reaches a predetermined level; gate pulse generating means coupled to said voltage comparator means for generating gate pulses having a predetermined length responsive to the delayed pulses, said gate pulse generating means being coupled to said gate means whereby the same is turned on for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and said input circuit for providing an output signal responsive to coincidence of an input pulse and a delayed pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 9

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; bistable multivibrator means coupled to said input circuit for providing a trigger pulse responsive to an input pulse, said multivibrator being incapable of retriggering responsive to further input pulses; delay means coupled to said multibigrator means for delaying said trigger pulses a predetermined amount; gate pulse generating means coupled to said delay means for generating gate pulses having a predetermined length responsive to the delayed pulses; said gate pulse generating means being coupled to said multivibrator means for retriggering the same for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 10

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; bistable multivibrator means coupled to said input circuit for providing a trigger pulse responsive to an input pulse, said multivibrator being incapable of retriggering responsive to further input pulses; delay means coupled to said multibigrator means for delaying said trigger pulses a predetermined amount; gate pulse generating means coupled to said delay means for generating gate pulses having a predetermined length responsive to the delayed pulses; said gate pulse generating means being coupled to said multivibrator means for retriggering the same for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 11

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; bistable multivibrator means coupled to said input circuit for providing a trigger pulse responsive to an input pulse, said multivibrator being incapable of retriggering responsive to further input pulses; selectively adjustable delay means coupled to said multivibrator means for delaying the trigger pulse by an amount D T - Delta T where D is the time delay, T is the predicted period of the input pulses and Delta T is a period at least one half the duration of one input pulse; selectively adjustable gate pulse generating means coupled to said delay means for generating gate pulses having a length 2 Delta T responsive to the delayed pulsEs, said gate pulses being at least as long as said input pulses, said gate pulse generating means being coupled to said multivibrator means for regriggering the same for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 12

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; bistable multivibrator means coupled to said input circuit for providing a trigger pulse responsive to an input pulse, said multivibrator being incapable of retriggering responsive to further input pulses; selectively adjustable delay means coupled to said multivibrator means for delaying the trigger pulse by an amount D T - Delta T where D is the time delay, T is the predicted period of the input pulses and Delta T is a period at least one half the duration of one input pulse; selectively adjustable gate pulse generating means coupled to said delay means for generating gate pulses having a length 2 Delta T responsive to the delayed pulsEs, said gate pulses being at least as long as said input pulses, said gate pulse generating means being coupled to said multivibrator means for regriggering the same for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 13

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; bistable multivibrator means coupled to said input circuit for providing a trigger pulse responsive to an input pulse, said multivibrator being incapable of retriggering responsive to further input pulses; sweep voltage generating means coupled to said multivibrator means for providing a sweep voltage responsive to a trigger pulse; voltage comparator means coupled to said sweep voltage generating means for providing a pulse having a predetermined delay when said sweep voltage reaches a predetermined level; gate pulse generating means coupled to said voltage comparator means for generating gate pulses having a predetermined length responsive to the delayed pulses; said gate pulse generating means being coupled to said multivibrator means for retriggering the same for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 14

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; bistable multivibrator means coupled to said input circuit for providing a trigger pulse responsive to an input pulse, said multivibrator being incapable of retriggering responsive to further input pulses; sweep voltage generating means coupled to said multivibrator means for providing a sweep voltage responsive to a trigger pulse; voltage comparator means coupled to said sweep voltage generating means for providing a pulse having a predetermined delay when said sweep voltage reaches a predetermined level; gate pulse generating means coupled to said voltage comparator means for generating gate pulses having a predetermined length responsive to the delayed pulses; said gate pulse generating means being coupled to said multivibrator means for retriggering the same for reception of another input pulse responsive to a said gate pulse; and coincidence means coupled to said gate pulse generating means and to said input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 15

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; a bistable multivibrator having an input circuit coupled to said pulse train input circuit and having an output circuit for providing a step trigger pulse of predetermined polarity responsive to an input pulse, said multivibrator being incapable of retriggering responsive to further input pulses prior to reception of an opposite polarity retriggering pulse, a differentiating circuit coupling said multivibrator output circuit to the input circuit of a sweep voltage generator for providing a sweep voltage responsive to a differential trigger pulse; a voltage comparator having its input circuit coupled to the output circuit of said sweep voltage generator, said voltage comparator being arranged to compare a selectively adjustable reference voltage with said sweep voltage thereof to provide a delayed pulse having a predetermined delay D T - Delta T where D is the time delay, T is the predicted period of the input pulses and Delta T is a period at least one half the duration of one input pulse; a selectively adjustable gate pulse generator having its input circuit coupled to the output circuit of said voltage comparator and arranged to provide gate pulses having a length 2 Delta T responsive to said delayed pulses, said gate pulses being at least as long as said input pulses; said gate pulse generator having one output circuit coupled to said input circuit of said multivibrator by another differentiating circuit and arranged to provide differentiated gAte pulses thereto having a polarity opposite from said input pulses For retriggering said multivibrator for reception of another input pulse, and an AND circuit having one input circuit coupled to another output circuit of said gate pulse generator and having another input circuit coupled to said pulse train input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.

Claim 16

A system for determining the pulse repetition frequency of a relatively short train of pulses comprising: an input circuit adapted to receive said train of pulses; a bistable multivibrator having an input circuit coupled to said pulse train input circuit and having an output circuit for providing a step trigger pulse of predetermined polarity responsive to an input pulse, said multivibrator being incapable of retriggering responsive to further input pulses prior to reception of an opposite polarity retriggering pulse, a differentiating circuit coupling said multivibrator output circuit to the input circuit of a sweep voltage generator for providing a sweep voltage responsive to a differential trigger pulse; a voltage comparator having its input circuit coupled to the output circuit of said sweep voltage generator, said voltage comparator being arranged to compare a selectively adjustable reference voltage with said sweep voltage thereof to provide a delayed pulse having a predetermined delay D T - Delta T where D is the time delay, T is the predicted period of the input pulses and Delta T is a period at least one half the duration of one input pulse; a selectively adjustable gate pulse generator having its input circuit coupled to the output circuit of said voltage comparator and arranged to provide gate pulses having a length 2 Delta T responsive to said delayed pulses, said gate pulses being at least as long as said input pulses; said gate pulse generator having one output circuit coupled to said input circuit of said multivibrator by another differentiating circuit and arranged to provide differentiated gAte pulses thereto having a polarity opposite from said input pulses For retriggering said multivibrator for reception of another input pulse, and an AND circuit having one input circuit coupled to another output circuit of said gate pulse generator and having another input circuit coupled to said pulse train input circuit for providing an output signal responsive to coincidence of an input pulse and a gate pulse whereby the delay of said delay means indicates the repetition frequency of said train of pulses.