Pulse shaping network

Claim 2

Apparatus for shaping an electrical pulse within one of a succession of intervals of uniform duration and which extends beyond said one interval so as to contribute to the noise content in an adjacent interval, comprising means responsive to said pulse for supplying a first signal corresponding to said pulse; means responsive to said pulse for supplying a second signal corresponding to said pulse and delayed therefrom by a first delay amount; means responsive to said pulse for supplying a third signal corresponding to said pulse and delayed therefrom by a second delay amount; ratio determining means responsive to at least one of said first, second and third signals for providing that the amplitudes of said first and third signals relative to the amplitude of said second signal represent a first ratio; combining means having first, second and third input terminals for receiving respective input signals and an output terminal, said combining means performing a predetermined combinatorial operation on the signals received at said input terminals and delivering an output signal at said output terminal representing the result of said combinatorial operation; and means for coupling said first, second and third signals respectively to said first, second and third input terminals; said ratio determining means designed to have said first ratio provide a maximum second ratio between the maximum amplitude of said output signal within a predetermined portion of said one interval and the maximum amplitude of said output signal during a predetermined portion of another of said intervals adjacent to said one interval so as to confine said output signal to said one interval.

Claim 3

The apparatus of claim 1, wherein said first delay amount is equal to one-half the duration of one of said intervals and said second delay amount is equal to the full duration of one of said intervals.

Claim 4

The apparatus of claim 2, wherein said combinatorial operation performed by said combining means on said first, second and third signals is an algebraic addition operation.

Claim 5

The apparatus of claim 3, wherein said first and third signals are of opposite polarity to said second signal.

Claim 6

The apparatus of claim 4, wherein said predetermined portion of said one interval comprises the entirety of said one interval and said predetermined portion of said adjacent interval comprises the entirety of said adjacent interval.

Claim 7

The apparatus of claim 4, wherein said first ratio is determined for a gaussian pulse closely approximating said electrical pulse and said maximum second ratio is determined for said output signal as delivered in response to first, second and third signals which correspond to said gaussian pulse.

Claim 8

A pulse shaping network for changing the shape of an electrical pulse occurring over at least consecutive first and second intervals, one of said intervals corresponding to a defining interval for said pulse, comprising: a network input lead for receiving said pulse; first and second delay elements, each of said delay elements having respective input and output leads, the input lead of said first delay element being connected to said network input lead and the output lead of said first delay element being connected to the input lead of said second delay element; a first attenuator inverter, said first inverter having an input lead for receiving an input signal and an output lead for delivering an output signal, the amplitude of the output signal delivered by said first inverter representing a first ratio relative to the amplitude of the input signal received thereby, said ratio being less than unity, and the polarity of the output signal delivered by said first inverter being opposite to the polarity of the input signal received thereby, the input lead of said first inverter being coupled to the input lead of said first delay element; a second attenuator inverteR, said second inverter having an input lead for receiving an input signal and an output lead for delivering an output signal, the amplitude of the signal delivered by said second inverter representing a second ratio relative to the amplitude of the input signal received thereby, said second ratio being less than unity, and the polarity of the output signal delivered by such second inverter being opposite to the polarity of the input signal received thereby, the input lead of said second inverter being coupled to the output lead of said second delay element; a summing means having first, second and third input terminals for receiving respective input signals and an output terminal, said summing means performing an algebraic addition operation on the signals received at said input terminals and delivering an output signal at said output terminal representing the algebraic sum of the values represented by the three input signals received at said input terminals; and means for coupling the first input terminal of said summing means to the output lead of said first inverter, for coupling the second input terminal of said summing means to the output lead of said first delay element, and for coupling the third input terminal of said summing means to the output lead of said second inverter; said first and second ratios being selected to provide a maximum third ratio between the maximum amplitude of said summing means output signal within a predetermined portion of said second interval and the maximum amplitude of said summing means output signal during a predetermined portion of said first interval whereby said output signal is confined to said defining interval.

Claim 9

A pulse shaping network for changing the shape of an electrical pulse occurring over at least consecutive first and second intervals, one of said intervals corresponding to a defining interval for said pulse, comprising: a network input lead for receiving said pulse; first and second delay elements, each of said delay elements having respective input and output leads, the input lead of said first delay element being connected to said network input lead and the output lead of said first delay element being connected to the input lead of said second delay element; a first attenuator inverter, said first inverter having an input lead for receiving an input signal and an output lead for delivering an output signal, the amplitude of the output signal delivered by said first inverter representing a first ratio relative to the amplitude of the input signal received thereby, said ratio being less than unity, and the polarity of the output signal delivered by said first inverter being opposite to the polarity of the input signal received thereby, the input lead of said first inverter being coupled to the input lead of said first delay element; a second attenuator inverteR, said second inverter having an input lead for receiving an input signal and an output lead for delivering an output signal, the amplitude of the signal delivered by said second inverter representing a second ratio relative to the amplitude of the input signal received thereby, said second ratio being less than unity, and the polarity of the output signal delivered by such second inverter being opposite to the polarity of the input signal received thereby, the input lead of said second inverter being coupled to the output lead of said second delay element; a summing means having first, second and third input terminals for receiving respective input signals and an output terminal, said summing means performing an algebraic addition operation on the signals received at said input terminals and delivering an output signal at said output terminal representing the algebraic sum of the values represented by the three input signals received at said input terminals; and means for coupling the first input terminal of said summing means to the output lead of said first inverter, for coupling the second input terminal of said summing means to the output lead of said first delay element, and for coupling the third input terminal of said summing means to the output lead of said second inverter; said first and second ratios being selected to provide a maximum third ratio between the maximum amplitude of said summing means output signal within a predetermined portion of said second interval and the maximum amplitude of said summing means output signal during a predetermined portion of said first interval whereby said output signal is confined to said defining interval.

Claim 10

The network of claim 7, wherein the amount of delay provided by each of said first and second delay elements is equal to one-half the duration of said second interval.

Claim 11

The network of claim 8, wherein said predetermined portion of said first interval comprises the entirety of said first interval and said predetermined portion of said second interval comprises the entirety of said second interval.

Claim 12

The network of claim 9, wherein said first and second ratios are equal and are determined for a gaussian pulse closely approximating said electrical pulse and said maximum third ratio is determined for said output signal of said summing means as delivered in response to the application of said gaussian pulse to said network input lead.

Claim 13

The network of claim 8, wherein said first and second ratios are determined for a gaussian pulse closely approximating said electrical pulse and said maximum third ratio is determined for said output signal as delivered by said summing means in response to the application of said gaussian pulse to said network input lead.