Patent US3781722A successfully refreshed from Google Patents.
US3781722A
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Digitally variable delay time system
Assignee: RCA Corp
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Filing: 1973-03-12
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Granted: 1973-12-25
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Expires: 1993-03-12
Abstract
Abstract A system for providing a digitally variable delay time for electrical signals utilizes a connection of multiple delay line sections each of which contributes to the overall system delay time. Each delay line section comprises first and second selectable transmission lines having different electrical lengths and a different magnitude of attenuation per unit length.
Inventors
- 👤 P Pierson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:19
CPC Classifications
H; H03; H03H; H03H17/00; H03H17/0009
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
199 words
A system for providing a digitally variable delay time for electrical signals transmitted over an operating frequency bandwidth from a system input terminal to a system output terminal through a connection of multiple delay line sections each having a first selectable transmission path of negligible delay time and a second selectable transmission path, said second path having a predetermined delay time relative to said first transmission path delay time, the improvement comprising: said first transmission path being a predetermined length of electrical transmission line having a predetermined magnitude of signal attenuation per unit length over said operating frequency bandwidth; said second transmission path being an electrical signal transmission line having a predetermined length electrically longer than said preDetermined length of said first electrical signal transmission line and having a predetermined magnitude of signal attenuation per unit length over said operating frequency bandwidth less than said predetermined magnitude of signal attenuation per unit length of said first electrical signal transmission line to cause signal attenuation in said first and second electrical signal transmission lines to be substantially equal over said operating frequency bandwidth and; means for selecting either of said first and second transmission paths of said delay line sections.
Claim 2
Independent Claim
199 words
A system for providing a digitally variable delay time for electrical signals transmitted over an operating frequency bandwidth from a system input terminal to a system output terminal through a connection of multiple delay line sections each having a first selectable transmission path of negligible delay time and a second selectable transmission path, said second path having a predetermined delay time relative to said first transmission path delay time, the improvement comprising: said first transmission path being a predetermined length of electrical transmission line having a predetermined magnitude of signal attenuation per unit length over said operating frequency bandwidth; said second transmission path being an electrical signal transmission line having a predetermined length electrically longer than said preDetermined length of said first electrical signal transmission line and having a predetermined magnitude of signal attenuation per unit length over said operating frequency bandwidth less than said predetermined magnitude of signal attenuation per unit length of said first electrical signal transmission line to cause signal attenuation in said first and second electrical signal transmission lines to be substantially equal over said operating frequency bandwidth and; means for selecting either of said first and second transmission paths of said delay line sections.
Claim 3
Dependent Claim
18 words
A system according to claim 1, wherein said first and second electrical transmission lines are coaxial transmission lines.
Claim 4
Dependent Claim
21 words
A system according to claim 1, including an attenuation equalizer means having an input terminal connected to said system output terminal.
Claim 5
Dependent Claim
23 words
A system according to claim 3, including an amplifier having an input terminal connected to an output terminal of said attenuation equalizer means.
References Cited (Backward Citations)
US3583065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |