US3944926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing technique for NRZ data signals
Assignee: RCA Corp
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Filing: 1974-12-06
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Granted: 1976-03-16
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Expires: 1994-12-06
Abstract
Abstract Circuit for modifying a transmitted Non-Return-to-Zero signal to insert a frequency component at the bit rate to permit linear processing at the receiver to extract timing signals.
Inventors
- 👤 Kamilo Feher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:38
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
The combination comprising: means for generating non-return-to-zero binary information signals; means for modifying said signals to have rise times differing from fall times including signal output means, signal integrating means for producing an integrated signal to said signal output means, timing means responsive to said binary information signals for producing a timing signal having a duration less than each bit of said binary information signals, and gating means responsive to said timing signal for applying said binary information signals to said signal integrating means during the timing signal duration and otherwise to said signal output means; and means for transmitting said signals from said signal output means to a receiving means.
Claim 2
Dependent Claim
111 words
The combination comprising: means for generating non-return-to-zero binary information signals; means for modifying said signals to have rise times differing from fall times including signal output means, signal integrating means for producing an integrated signal to said signal output means, timing means responsive to said binary information signals for producing a timing signal having a duration less than each bit of said binary information signals, and gating means responsive to said timing signal for applying said binary information signals to said signal integrating means during the timing signal duration and otherwise to said signal output means; and means for transmitting said signals from said signal output means to a receiving means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |