US3707604A
Expired / Lapsed
US
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Telecommunication system with time division multiplex
Assignee: US Philips Corp
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Filing: 1971-06-22
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Granted: 1972-12-26
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Expires: 1991-06-22
Abstract
Abstract A telecommunication system with time division multiplex comprising receive transmission lines and send transmission lines and a clock for generating a time scale which is divided into mutually equal frame time intervals, each of which is divided into k mutually equal main time intervals, each of which is divided into m mutually equal sub-time intervals, the transmission lines being divided into groups, and the groups being divided into main groups, each group of receive transmission line being connected to an adjustable first-order multiplexer, the first-order multiplexers of a main group being connected to an adjustable second-order multiplexer, each group of send transmission lines being connected to an adjustable first-order demultiplexer, the first-order demultiplexers of a main group being connected to an adjustable second-order demultiplexer, a switching network being provided for connecting the second-order multiplexers to the second-order demultiplexers. In a preferred embodiment the steepness of the edges and the pulse widths are adapted to the locally prevailing signal pulse frequency.
Inventors
- 👤 Johannes Anton Greefkes
- 👤 Oscar Bernardus Philomenus Koe
- 👤 Adrianus Wilhelmus Maria Enden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:59
CPC Classifications
H; H04; H04J; H04J3/00; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
441 words
A telecommunication system with time division multiplex, comprising receive transmission lines and send transmission lines and a clock for generating a time scale which is divided into mutually equal frame time intervals, each of which is divided into k mutually equal main time intervals, the receive transmission lines being divided into groups and each group being connected to an adjustable first-order multiplexer which is controlled by a cyclic address store having k store locations in each of which a variable address can be stored, for establishing in each frame time interval a signal transfer from each receive transmission line of the group to a receive group intermediate highway in a main time interval selectively associated with the receive transmission line and having the same relative position in each frame time interval, the send transmission lines being divided into groups and each group being connected to an adjustable first-order demultiplexer which is controlled by a cyclic address store having k store locations, in each of which a variable address can be stored for establishing in each frame time interval a signal transfer from a send group intermediate highway to each send transmission line of the group in a main time interval selectively associated with the send transmission line and having the same relative position in each frame time interval, characterized in that each of the main time intervals is divided into m mutually equal sub-time intervals, the receive group intermediate highways being divided into main groups and eaCh main group being connected to an adjustable second-order multiplexer which is controlled by a cyclic address store having k.m store locations, in each of which a variable address can be stored for establishing in each main time interval a signal transfer from each receive group intermediate highway of the main group to a receive main group intermediate highway in a sub-time interval selectively associated with the receive group intermediate highway and having the same relative position in each frame time interval, the send group intermediate highways being divided into main groups and each main group being connected to an adjustable second-order demultiplexer which is controlled by a cyclic address store having k.m store locations, in each of which a variable address can be stored for establishing in each main time interval a signal transfer from a send main group intermediate high-way to each send group intermediate highway of the main group in a sub-time interval selectively associated with the send group intermediate highway and having the same relative position in each frame time interval, a switching network being provided for connecting the receive main group intermediate highways to the send main group intermediate highways.
Claim 2
Dependent Claim
441 words
A telecommunication system with time division multiplex, comprising receive transmission lines and send transmission lines and a clock for generating a time scale which is divided into mutually equal frame time intervals, each of which is divided into k mutually equal main time intervals, the receive transmission lines being divided into groups and each group being connected to an adjustable first-order multiplexer which is controlled by a cyclic address store having k store locations in each of which a variable address can be stored, for establishing in each frame time interval a signal transfer from each receive transmission line of the group to a receive group intermediate highway in a main time interval selectively associated with the receive transmission line and having the same relative position in each frame time interval, the send transmission lines being divided into groups and each group being connected to an adjustable first-order demultiplexer which is controlled by a cyclic address store having k store locations, in each of which a variable address can be stored for establishing in each frame time interval a signal transfer from a send group intermediate highway to each send transmission line of the group in a main time interval selectively associated with the send transmission line and having the same relative position in each frame time interval, characterized in that each of the main time intervals is divided into m mutually equal sub-time intervals, the receive group intermediate highways being divided into main groups and eaCh main group being connected to an adjustable second-order multiplexer which is controlled by a cyclic address store having k.m store locations, in each of which a variable address can be stored for establishing in each main time interval a signal transfer from each receive group intermediate highway of the main group to a receive main group intermediate highway in a sub-time interval selectively associated with the receive group intermediate highway and having the same relative position in each frame time interval, the send group intermediate highways being divided into main groups and each main group being connected to an adjustable second-order demultiplexer which is controlled by a cyclic address store having k.m store locations, in each of which a variable address can be stored for establishing in each main time interval a signal transfer from a send main group intermediate high-way to each send group intermediate highway of the main group in a sub-time interval selectively associated with the send group intermediate highway and having the same relative position in each frame time interval, a switching network being provided for connecting the receive main group intermediate highways to the send main group intermediate highways.
Claim 3
Dependent Claim
183 words
A telecommunications system as claimed in claim 1, characterized in that each sub-time interval is divided into n mutually equal elementary time intervals, the receive main group intermediate highways being connected to an adjustable third-order multiplexer and the send main group intermediate highway being connected to a third-order demultiplexer, the third-order multiplexer being connected via a central intermediate highway to the third-order demultiplexer, the third-order multiplexer being controlled by a cyclic address store having k.m.n. store locations, in each of which a variable address can be stored for establishing in each sub-time interval a signal transfer from each receive main group intermediate highway to the central intermediate highway in an elementary time interval selectively associated with the receive main group intermediate highway and having the same relative position in each frame time interval, the third-order demultiplexer being controlled by a cyclic modulo-n elementary time interval counter for establishing in each sub-time interval a signal transfer from the central intermediate highway to each send main group intermediate highway in an elementary time interval which is permanently associated with the send main group intermediate highway.
Claim 4
Dependent Claim
19 words
A telecommunication system as claimed in claim 2, characterized in that the demultiplexers comprise pulse-wideners controlled by clock pulses.
Claim 5
Dependent Claim
49 words
A telecommunication system as claimed in claim 2, characterized in that each first-order multiplexer and the corresponding first-order demultiplexer are controlled by a common address store having k store locations, each second-order multiplexer and the corresponding second-order demultiplexer being controlled by a common address store having k-m. store locations.
Claim 6
Dependent Claim
38 words
A telecommunication system as claimed in claim 4, characterized in that each first-order multiplexer and the corresponding first-order demultiplexer are connected to a common decoder which is controlled by the said common address store having k store locations.
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |