US3790881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse width selector
Assignee: United States Department of the Army
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Filing: 1973-03-06
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Granted: 1974-02-05
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Expires: 1993-03-06
Abstract
Abstract An apparatus for accepting or rejecting pulses on the basis of pulse duration. Each pulse in an incoming pulse train is clocked into a first shift register, while a counter records the duration of the pulse. When the end of the pulse is recognized, the counter is checked to establish whether the pulse duration is within the predefined limits which have been established by the operator and set into the counting circuitry. If the pulse duration (width) is within the established limits, the pulse is shifted in parallel, out of the first shift register to a second shift register. If the pulse duration is outside the established limit, it is eliminated entirely (depending on the mode of operation). The first shift register is reset and is ready to receive the next pulse in the pulse train. The pulses in the second shift register are then shifted to an output line completing the selection process.
Inventors
- 👤 D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:36
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/02; G01R29/027; G01R29/0273
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
154 words
An apparatus for accepting or rejecting an input pulse on the basis of its width comprising: a source of input pulses; first storage means; means for clocking an input pulse from said source into said first storage means, the required number of clock pulses being proportional to the width of said input pulse; means connected to said clocking means for counting the number of clock pulses required to clock said input pulse into said first storage means, said counting means having predefined numerical limits; means connected to said counting means for detecting whether said number of clock pulses falls within said predefined numerical limits, thereby determining whether said input pulse is to be accepted or rejected; second storage means; and means connected to said detecting means for alternatively clearing a rejected input pulse from said first storage means or transferring an accepted input pulse from said first storage means into said second stOrage means.
Claim 2
Independent Claim
154 words
An apparatus for accepting or rejecting an input pulse on the basis of its width comprising: a source of input pulses; first storage means; means for clocking an input pulse from said source into said first storage means, the required number of clock pulses being proportional to the width of said input pulse; means connected to said clocking means for counting the number of clock pulses required to clock said input pulse into said first storage means, said counting means having predefined numerical limits; means connected to said counting means for detecting whether said number of clock pulses falls within said predefined numerical limits, thereby determining whether said input pulse is to be accepted or rejected; second storage means; and means connected to said detecting means for alternatively clearing a rejected input pulse from said first storage means or transferring an accepted input pulse from said first storage means into said second stOrage means.
Claim 3
Dependent Claim
36 words
An apparatus according to claim 1, wherein the counting means accumulates the required number of clock pulses for successive input pulses, said counting means returning to a reference value after each successive input pulse is processed.
Claim 4
Dependent Claim
21 words
An apparatus according to claim 2, wherein the clocking means drives said first and second storage means and said counting means.
Claim 5
Dependent Claim
25 words
An apparatus according to claim 3, wherein said counting means includes means for storing operator-settable limits of minimum and maximum required number of clock pulses.
Claim 6
Dependent Claim
34 words
An apparatus according to claim 4, wherein said detecting means includes means for recognizing the end of each successive input pulse, said counting means ceasing its operation when said end of pulse is recognized.
Claim 7
Dependent Claim
32 words
An apparatus according to claim 4, wherein said detecting means includes means for continuously comparing the number of clock pulses against said minimum and maximum limits already established in said counting means.
Claim 8
Dependent Claim
14 words
An apparatus according to claim 4, wherein said counting means includes a binary counter.
Claim 9
Dependent Claim
64 words
An apparatus according to claim 7, wherein each stage of said first storage means is connected to the corresponding stage of said second storage means, the information located in said first storage means being shifted in parallel to said second storage means on command of said detecting means, said information retaining the pulse width and pulse interval information of the original input pulse train.
Claim 10
Dependent Claim
36 words
An apparatus according to claim 8, which includes means for resetting the first storage means and counting means to b reference value, ready to receive and analyze the next successive pulse in the input pulse train.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |