US3588707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable delay circuit
Assignee: International Standard Electric Corp
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Filing: 1968-09-30
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Granted: 1971-06-28
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Expires: 1988-09-30
Abstract
Abstract AN AUTOMATIC VARIABLE DIGITAL DELAY CIRCUIT TO COMPENSATE A DIGITAL SIGNAL FOR VARIABLE DELAYS IN NETWORKS EMPLOYING TDM CHANNELS. THE CIRCUIT INCLUDES A FIRST SHIFT REGISTER IN WHICH THE SYNC PULSE OF THE INPUT PULSE TRAIN IS STEPPED THERETHROUGH AT A GIVEN RATE. THE OUTPUT OF EACH SHIFT REGISTER STAGE IS GATED WITH A LOCAL SYNC PULSE. THE STAGE THAT IS "ON" WHEN LOCAL SYNC PULSE OCCURS IDENTIFIES THE DELAY NECESSARY TO ACHIEVE SYNC. THIS DELAY IS OBTAINED BY PASSING THE ENTIRE PULSE TRAIN THROUGH A SECOND IDENTICAL SHIFT REGISTER AND TAK- ING THE OUTPUT FROM THE STAGE THEREOF CORRESPONDING TO THE STAGE OF THE FIRST SHIFT REGISTER IDENTIFYING REQUIRED DELAY.
Inventors
- 👤 Roger Alan Manship
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:44
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H03; H03K; H03K5/00; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/062; H04J3/0626; H04L; H04L12/00; H04L12/28; H04L12/42; H04L12/422; H04L27/00; H04L27/02; H04L27/04; H04L7/00; H04L7/04; H04L7/0016; H04L7/0033; H04L7/0041
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |