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Patent US4783791A successfully refreshed from Google Patents.
US4783791A
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Multiple reproducing repeater station system
Assignee: Hitachi Ltd
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Filing: 1987-04-15
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Granted: 1988-11-08
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Expires: 2007-04-15
Abstract
Abstract A multiple reproducing repeater station system having a plurality of repeater stations connected in tandem. Each of the repeater stations comprises a logical circuit for decoding data from a pulse-modulated signal transmitted from the preceding repeater station and delivering decoded data to a processing circuit, and a PLL for extracting a clock signal from the pulse-modulated signal. The PLL has an operational response time which is so adjusted as to be different from a data delay time due to a logical operation within the logical circuit.
Inventors
- 👤 Ryozo Yoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:32
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/36; H04L; H04L7/00; H04L7/02; H04L7/033
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
A multiple reproducing repeater station system comprising a plurality of repreater stations connected in tandem, each repeater station having a phase locked loop, wherein each of said phase locked loops includes mean for setting an operational response time thereof to be different from a data delay time due to a logical operation during the repeating operation within an associated one of said repeater stations.
Claim 2
Dependent Claim
64 words
A multiple reproducing repeater station system comprising a plurality of repreater stations connected in tandem, each repeater station having a phase locked loop, wherein each of said phase locked loops includes mean for setting an operational response time thereof to be different from a data delay time due to a logical operation during the repeating operation within an associated one of said repeater stations.
Claim 3
Dependent Claim
43 words
A multiple reproducing repeater station system according to claim 1 wherein long and short data delay times are used for different repeater stations and the phase locked loop operational response time is set to fall between the long and short data delay times.
Claim 4
Dependent Claim
121 words
A multiple reproducing repeater station system comprising a plurality of repeater stations connected in tandem, each repeater station having a phase locked loop, wherein each of said repeater stations comprises: a logical circuit for decoding data from a pulse-modulated signal transmitted from the preceding repeater station and delivering decoded data after temporary holding thereof; a phase locked loop for extracting a clock from said pulse-modulated signal, said phase locked loop having an operational response time which is set to be different from a hold time of said logical circuit; and a modulation circuit for modulating an output signal from said logical circuit with said clock generated from said phase locked loop and delivering a modulated signal to the subsequent repeater station.
Claim 5
Dependent Claim
121 words
A multiple reproducing repeater station system comprising a plurality of repeater stations connected in tandem, each repeater station having a phase locked loop, wherein each of said repeater stations comprises: a logical circuit for decoding data from a pulse-modulated signal transmitted from the preceding repeater station and delivering decoded data after temporary holding thereof; a phase locked loop for extracting a clock from said pulse-modulated signal, said phase locked loop having an operational response time which is set to be different from a hold time of said logical circuit; and a modulation circuit for modulating an output signal from said logical circuit with said clock generated from said phase locked loop and delivering a modulated signal to the subsequent repeater station.
Claim 6
Dependent Claim
32 words
a multiple reproducing repeater station system according to claim 3 wherein said phase locked loop operational response time is set to be greater than twice said hold time of said logical circuit.
Claim 7
Dependent Claim
33 words
A multiple reproducing repeater station system according to claim 3 wherein said phase locked loop operational response time is set to be greater than five times said hold time of said logical circuit.
Claim 8
Dependent Claim
33 words
A multiple reproducing repeater station system according to claim 3 wherein said phase locked loop operational response time is set to be less than 2/3 of said hold time of said logical circuit.
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) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |