US3898571A
Expired / Lapsed
US
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Pulse shape detector
Assignee: United States Department of the Air Force
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Filing: 1974-05-13
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Granted: 1975-08-05
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Expires: 1994-05-13
Abstract
Abstract A pulse shape detector apparatus to process the distorted pulse output of logarithmic amplifiers in heterodyne receivers and to synthesize a replica of the input pulse to the amplifier.
Inventors
- 👤 Samuel J Caprio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:48
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/32; H; H03; H03K; H03K5/00; H03K5/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
263 words
A pulse shape detector apparatus for synthesizing the input pulse to a logarithmic amplifier comprising in combination: a control means to receive the output pulse from said logarithmic amplifier, said control means comparing said output pulse to a predetermined threshold level, said control means generating a control signal when said output pulse exceeds said predetermined threshold level, a sample and compare means receiving said output pulse, said sample and compare means having a first, second and third sampling rate, said first sampling rate providing a first pulse having a first predetermined level, said second sampling rate providing a second pulse having a second predetermined level, said third sampling rate providing a third pulse having a third predetermined level, said control means providing said control signal to said sample and compare means to reset said sample and compare means to process said output pulse, a logic control means connected to said sample and compare means to receive said first, second and third pulses therefrom, said logic control means receiving said control signal from said control means, and a summing network connected to said logic control means to receivE said first, second, and third pulses, said logic control means being reset by said control signal to apply said first, second and third pulses to said summing network, said summing network summing said first, second and third pulses to provide a synthesized output pulse, said synthesized output pulse representing the synthesized pulse waveform of said input pulse to said logarithmic amplifier, said second pulse representing the pulse width of said input pulse to said logarithmic amplifier.
Claim 2
Dependent Claim
263 words
A pulse shape detector apparatus for synthesizing the input pulse to a logarithmic amplifier comprising in combination: a control means to receive the output pulse from said logarithmic amplifier, said control means comparing said output pulse to a predetermined threshold level, said control means generating a control signal when said output pulse exceeds said predetermined threshold level, a sample and compare means receiving said output pulse, said sample and compare means having a first, second and third sampling rate, said first sampling rate providing a first pulse having a first predetermined level, said second sampling rate providing a second pulse having a second predetermined level, said third sampling rate providing a third pulse having a third predetermined level, said control means providing said control signal to said sample and compare means to reset said sample and compare means to process said output pulse, a logic control means connected to said sample and compare means to receive said first, second and third pulses therefrom, said logic control means receiving said control signal from said control means, and a summing network connected to said logic control means to receivE said first, second, and third pulses, said logic control means being reset by said control signal to apply said first, second and third pulses to said summing network, said summing network summing said first, second and third pulses to provide a synthesized output pulse, said synthesized output pulse representing the synthesized pulse waveform of said input pulse to said logarithmic amplifier, said second pulse representing the pulse width of said input pulse to said logarithmic amplifier.
Claim 3
Dependent Claim
105 words
A pulse shape detector apparatus as described in claim 1 wherein said control means comprises in combination: a threshold comparator to receive said output pulse from said logarithmic amplifier, said threshold comparator receiving a threshold reference voltage, said threshold comparator comparing said output pulse to said threshold reference voltage, said threshold comparator generating a voltage signal when said output pulse exceed said threshold reference voltage, and monostable multivibrator connected to said threshold comparator to receive said voltage signal, said monostable multivibrator generating said control signal in response to said voltage signal, said control signal resetting said sample and compare means and said logic control means.
Claim 4
Dependent Claim
115 words
A pulse shape detector apparatus as described in claim 1 wherein said logic control means comprises in combination: a plurality of And gates to receive said first, second adn third pulses respectively, said plurality of And gates receiving said control signal from said control means, said plurality of And gates being reset by said control signal, said plurality of And gates performing the logical And function respectively upon receipt of said first, second and third pulses, and a plurality of buffer amplifiers respectively connected to said plurality of And gates to receive said first, second and third pulses respectively, said plurality of buffer amplifiers applying said first, second and third pulses to said summing network.
Claim 5
Dependent Claim
95 words
A pulse shape detector apparatus as described in claim 1 wherein said summing network comprises in combination: a first summing amplifier to receive said first pulse from said sample and compare means, and a second summing amplifier to receive said second and third pulses from said sample and compare means, said second summing amplifier summing said second and third pulses to provide a summed output, said summed output being applied to said first summing amplifier, said first pulse and said summed output being summed in said first summing amplifier to provide said synthesized output pulse.
Claim 6
Dependent Claim
70 words
A pulse shape detector apparatus as described in claim 1 further including a rise time detector connected to said logic control means to receive said first and third pulses from said sample and compare means, said rise time detector processing said first and third pulses to provide a rise time output signal, said rise time output signal being proportional to the rise time of said pulse to said logarithmic amplifier.
Claim 7
Dependent Claim
29 words
A pulse shape detector apparatus as described in claim 1 wherein said first predetermined level represents 90 percent of the level of said input pulse to said logarithmic amplifier.
Claim 8
Dependent Claim
29 words
A pulse shape detector apparatus as described in claim 1 wherein said second predetermined level represents 50 percent of the level of said input pulse to said logarithmic amplifier.
Claim 9
Dependent Claim
29 words
A pulse shape detector apparatus as described in claim 1 wherein said third predetermined level represents 10 percent of the level of said input pulse to said logarithmic amplifier.
References Cited (Backward Citations)
US3662274A
Cited
US3769611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |