US3768046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision distributed parameter delay line
Assignee: Individual
•
Filing: 1972-05-12
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Granted: 1973-10-23
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Expires: 1992-05-12
Abstract
Abstract A precision distributed parameter delay line for use in high speed circuitry requiring very precise nanosecond delay intervals. The delay line, in one preferred embodiment, comprises a section of coaxial cable transmission line having a central conductor and a coaxially aligned conductive sheath with the sheath preferably being insulated over its length. The section of coaxial cable tranmission line functions as a low impedance delay element of extremely small outer diameter whose length may be adjusted to provide delays of from tenths to hundreds of nanoseconds. The nature and size of the delay line is such as to make it extremely adaptable to being coiled so as to significantly reduce the amount of space which it occupies. A very short section of coaxial cable transmission line of similar design and impedance characteristics is coupled to the input and/or output ends of the coaxial cable transmission line section central conductor to improve the rise time and provide an extremely high delay to rise time ratio, low insertion loss, low characteristic impedance and is adaptable for use over a wide frequency bandwidth. The delay line may also take the form of a printed circuit of the microstrip type transmission line comprised of an elongated, preferably undulating conductive strip separated from a conductive ground plane by a suitable dielectric with input and output terminals being located a spaced distance from the extremities of the undulating conductive member to provide the characteristics set forth hereinabove while taking advantage of microconductor techniques to further reduce the size and allow dual-in-line delay line packages. Both of the above embodiments may be modified accordingly to provide a tapped delay line having the desirable characteristics set forth herein.
Inventors
- 👤 H Lorber
- 👤 I Duboff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:14
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/30; H03H7/34
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
185 words
A delay line device comprising input means for receiving an input pulse to be delayed; coaxial cable transmission line means having a predetermined length; said input means being coupled to said coaxial cable transmission line means a spaced distance from a first extremity of said coaxial cable transmission line means; output means coupled to the opposite end of said coaxial cable transmission line means for coupling the delayed input signal to an external circuit; the length of the delay interval being determined by the electrical length of said coaxial cable transmission line means measured between said point of connection with said input means and the opposite end of said coaxial cable transmission line means; said first extremity being electrically isolated from the remainder of said delay line as well as any associated circuitry; the portion of said coaxial cable transmission line means between said first extremity and said point of connection having an electrical length substantially shorter than the remainder of said coaxial cable transmission line means and being adapted to improve the rise time of the delayed input pulse appearing at said output means.
Claim 2
Dependent Claim
185 words
A delay line device comprising input means for receiving an input pulse to be delayed; coaxial cable transmission line means having a predetermined length; said input means being coupled to said coaxial cable transmission line means a spaced distance from a first extremity of said coaxial cable transmission line means; output means coupled to the opposite end of said coaxial cable transmission line means for coupling the delayed input signal to an external circuit; the length of the delay interval being determined by the electrical length of said coaxial cable transmission line means measured between said point of connection with said input means and the opposite end of said coaxial cable transmission line means; said first extremity being electrically isolated from the remainder of said delay line as well as any associated circuitry; the portion of said coaxial cable transmission line means between said first extremity and said point of connection having an electrical length substantially shorter than the remainder of said coaxial cable transmission line means and being adapted to improve the rise time of the delayed input pulse appearing at said output means.
Claim 3
Dependent Claim
181 words
A delay line device comprising output means for receiving an output pulse to be delayed; coaxial cable transmission line means having a predetermined length; said output means being coupled to one end of said coaxial cable transmission line means; said output means being coupled to said coaxial cable transmission line means a spaced distance inward from the opposite end thereof for coupling the delayed input signal to an external circuit; the length of the delay interval being determined by the electrical length of said coaxial cable transmission line means measured between the point of connection with said output means and said one end of said coaxial cable transmission line means; said opposite end being electrically isolated from the remaindeR of said delay line as well as any associated circuitry; the portion of said coaxial cable transmission line means between said one end and said point of connection having an electrical length substantially shorter than the remainder of said coaxial cable transmission line means and being adapted to improve the rise time of the delayed input pulse appearing at said output means.
Claim 4
Dependent Claim
181 words
A delay line device comprising output means for receiving an output pulse to be delayed; coaxial cable transmission line means having a predetermined length; said output means being coupled to one end of said coaxial cable transmission line means; said output means being coupled to said coaxial cable transmission line means a spaced distance inward from the opposite end thereof for coupling the delayed input signal to an external circuit; the length of the delay interval being determined by the electrical length of said coaxial cable transmission line means measured between the point of connection with said output means and said one end of said coaxial cable transmission line means; said opposite end being electrically isolated from the remaindeR of said delay line as well as any associated circuitry; the portion of said coaxial cable transmission line means between said one end and said point of connection having an electrical length substantially shorter than the remainder of said coaxial cable transmission line means and being adapted to improve the rise time of the delayed input pulse appearing at said output means.
Claim 5
Dependent Claim
55 words
The delay line device of claim 1 wherein said coaxial cable transmission line means is comprised of a first coaxial cable transmission line including a central conductor; dielectric means surrounding said central conductor and a conductive sheath surrounding said dielectric means and substantially coaxially aligned with said central conductor; insulation means covering said conductive sheath.
Claim 6
Dependent Claim
94 words
The delay line device of claim 3 wherein the portion of said coaxial cable transmission line means between said first extremity and said point of connection is a second coaxial cable transmission line including a central conductor; dielectrical means surrounding said central conductor, and a conductive sheath surrounding said dielectric means and substantially coaxially aligned with said central conductor; insulation means covering said conductive sheath; means electrically connecting adjacent ends of first and second coaxial cable transmission line central conductors; means for grounding adjacent ends of the first and second coaxial cable conductive sheaths.
Claim 7
Dependent Claim
221 words
A delay line device comprising input means for receiving an input pulse to be delayed; a transmission line means having a predetermined length; said input means being coupled to said transmission line means a spaced distance from a first extremity of said transmission line means; output means coupled to the opposite end of said transmission line means for coupling the delayed input signal to an external circuit; the length of the delay interval being determined by the electrical length of said transmission line means measured between said point of connection with said input means and the opposite end of said transmission line means; said first extremity being electrically isolated from the remainder of said delay line as well as any associated circuitry; the portion of said transmission line means between said first extremity and said point of connection having an electrical length substantially shorter than the remainder of said transmission line means and being adapted to improve the rise time of the delayed input pulse appearing at said output means; said transmission line means comprising: a layer of dielectric material; an elongated conductive strip being provided on one surface of said layer; a conductive ground plane being provided on the opposite surface of said layer; said point of connection being a spaced distance in from one extremity of said conductive strip.
Claim 8
Dependent Claim
221 words
A delay line device comprising input means for receiving an input pulse to be delayed; a transmission line means having a predetermined length; said input means being coupled to said transmission line means a spaced distance from a first extremity of said transmission line means; output means coupled to the opposite end of said transmission line means for coupling the delayed input signal to an external circuit; the length of the delay interval being determined by the electrical length of said transmission line means measured between said point of connection with said input means and the opposite end of said transmission line means; said first extremity being electrically isolated from the remainder of said delay line as well as any associated circuitry; the portion of said transmission line means between said first extremity and said point of connection having an electrical length substantially shorter than the remainder of said transmission line means and being adapted to improve the rise time of the delayed input pulse appearing at said output means; said transmission line means comprising: a layer of dielectric material; an elongated conductive strip being provided on one surface of said layer; a conductive ground plane being provided on the opposite surface of said layer; said point of connection being a spaced distance in from one extremity of said conductive strip.
Claim 9
Dependent Claim
20 words
The delay line device of claim 5 wherein said conductive strip is arranged in an undulating fashion on said layer.
Claim 10
Dependent Claim
36 words
The delay line of claim 5 wherein said delay line further comprises at least one additional conductive strip arranged on said one surface of said layer and being speced and electrically isolated from said first strip.
Claim 11
Dependent Claim
20 words
The delay line device of claim 5 wherein said conductive strips are arranged in an undulating fashion on said layer.
Claim 12
Dependent Claim
117 words
The delay line device of claim 5 further comprising a housing for said delay line device; said housing comprising a base member having input and output leads each having a first end protruding into the interior of said housing and a second end protruding from the exterior of said housing; means for electrically coupling the first ends of said leads respectively to the input and output means of said delay line device; a cover member sealed to said base member for encapsulating said delay line device; the interior region of said housing being filled with a foamed insulating material for rendering said delay line device shock proof and for maintaining the desired dielectric medium within said housing.
Claim 13
Dependent Claim
23 words
The delay line device of claim 9 wherein said foamed insulating material is taken from the group of materials comprising polyolefins and polyurethanes.
Claim 14
Dependent Claim
213 words
A delay line device comprising input means for receiving an input pulse to be delayed; transmission line means having a predetermined length; said input means being coupled to said transmission line means a spaced distance from a first extremity of said transmission line means; output means coupled to the opposite end of said transmission line means for coupling the delayed input signal to an external circuit; the length of the delay interval being determined by the electrical length of said transmission line means measured between said point of connection with said input means and the opposite end of said transmission line means; said first extremity being electrically isolated from the remainder of said delay line as well as any associated circuitry; the portion of said transmission line means between said first extremity and said point of connection having an electrical length substantially shorter than the remainder of said transmission line means and being adapted to improve the rise time of the delayed input pulse appearing at said input means; said transmission line means being comprised of first, second and third spaced conductive strips arranged in a spiral fashion on an insulating substrate; the point of connection of the input means being a spaced distance inward from a first extremity of the second conductor.
Claim 15
Dependent Claim
213 words
A delay line device comprising input means for receiving an input pulse to be delayed; transmission line means having a predetermined length; said input means being coupled to said transmission line means a spaced distance from a first extremity of said transmission line means; output means coupled to the opposite end of said transmission line means for coupling the delayed input signal to an external circuit; the length of the delay interval being determined by the electrical length of said transmission line means measured between said point of connection with said input means and the opposite end of said transmission line means; said first extremity being electrically isolated from the remainder of said delay line as well as any associated circuitry; the portion of said transmission line means between said first extremity and said point of connection having an electrical length substantially shorter than the remainder of said transmission line means and being adapted to improve the rise time of the delayed input pulse appearing at said input means; said transmission line means being comprised of first, second and third spaced conductive strips arranged in a spiral fashion on an insulating substrate; the point of connection of the input means being a spaced distance inward from a first extremity of the second conductor.
Claim 16
Dependent Claim
163 words
A tapped delay line device for providing a plurality of selectable delays comprising: a plurality of coaxial cable transmission line means; input means for receiving an input pulse to be delayed; said input means being coupled to one end of a first one of said coaxial cable transmission line means; a plurality of output means for electrically connecting the second end of said first coaxial cable transmission line means and the remaining ones of said coaxial cable means in end to end fashion; drain means comprising a short coaxial cable transmission line means having a first end electrically connected to the common junction between said input means and said one end of said first coaxial cable transmission line means and having a second end unterminated for improving the rise time of the delayed input pulse appearing at any one of said output means, the length of said drain means being shorter than any one of said plurality of coaxial cable transmission line means.
Claim 17
Dependent Claim
163 words
A tapped delay line device for providing a plurality of selectable delays comprising: a plurality of coaxial cable transmission line means; input means for receiving an input pulse to be delayed; said input means being coupled to one end of a first one of said coaxial cable transmission line means; a plurality of output means for electrically connecting the second end of said first coaxial cable transmission line means and the remaining ones of said coaxial cable means in end to end fashion; drain means comprising a short coaxial cable transmission line means having a first end electrically connected to the common junction between said input means and said one end of said first coaxial cable transmission line means and having a second end unterminated for improving the rise time of the delayed input pulse appearing at any one of said output means, the length of said drain means being shorter than any one of said plurality of coaxial cable transmission line means.
Claim 18
Dependent Claim
78 words
The delay line device of claim 12 wherein said plurality of coaxial cable transmission means and said drain means are each comprised of a first coaxial cable transmission line including a central conductor; dielectric means surrounding said central conductor and a conductive sheath surrounding said dielectric means and substantially coaxially aligned with said central conductor; insulating means covering said conductive sheath; said output means each being coupled between adjacent ends of the central conductors of associated coaxial cables.
Claim 19
Dependent Claim
77 words
The delay line device of claim 1 wherein said coaxial cable transmission means comprises: a layer of dielectric material; a plurality of elongated conductive strips being provided on one surface of said layer at spaced intervals; said point of connection being a spaced distance in from the extremities of said conductive strips whereby the portion of said strip between said point of connection and the extremity thereof functions to enhance the rise time of the delayed signal.
Claim 20
Dependent Claim
16 words
The delay line device of claim 14 wherein one of said strips is a ground return.
Claim 21
Dependent Claim
19 words
The delay line device of claim 14 comprising three strips; the outer two strips serving as a ground return.
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |