US3832647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal distribution network
Assignee: AT&T Inc
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Filing: 1973-11-13
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Granted: 1974-08-27
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Expires: 1993-11-13
Abstract
Abstract This application discloses a distribution network for coupling between a common signal source and a plurality of output loads. One embodiment of such a network comprises a plurality of n transistors and an equal plurality of two-winding transformers. The transistors are connected in the common base configuration with the collector of each of the first n-1 transistors being connected to the emitter of the next adjacent transistor through the primary winding of a different transformer. The collector of the nth transistor is connected to signal ground through the primary winding of the nth transformer. In accordance with one application of the invention, each secondary winding of the respective transformers is connected to a different output load. In accordance with another aspect of the invention, means are provided for constructively recombining the various output signals from the respective transformers in a common output load. Means are also disclosed for providing an impedance match at both the input and output ports of the network.
Inventors
- 👤 H Beurrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:28
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/36; H03H7/00; H03H7/48
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
A distribution network for coupling between a common signal source and n output ports comprising: an array of n distribution transistors connected in the common base configuration and a plurality of n-1 two-winding transformers; the emitter of the first of said transistors of said array constituting the input port of said network; the collector of each of the first n-1 transistors in said array being connected to the emitter of the next adjacent transistor through the primary winding of a different one of said transformers; the secondary windings of said transformers being connected to n-1 of said output ports; and means for coupling the collector of the last of said transistors to the nth output port.
Claim 2
Dependent Claim
116 words
A distribution network for coupling between a common signal source and n output ports comprising: an array of n distribution transistors connected in the common base configuration and a plurality of n-1 two-winding transformers; the emitter of the first of said transistors of said array constituting the input port of said network; the collector of each of the first n-1 transistors in said array being connected to the emitter of the next adjacent transistor through the primary winding of a different one of said transformers; the secondary windings of said transformers being connected to n-1 of said output ports; and means for coupling the collector of the last of said transistors to the nth output port.
Claim 3
Dependent Claim
62 words
The network according to claim 1 wherein said means for coupling the collector of said last transistor to said nth port comprising an nth two-winding transformer; wherein the collector of said last transistor is connected to signal ground through the primary winding of said nth transformer; and wherein the secondary winding of said nth transformer is connected to said nth output port.
Claim 4
Dependent Claim
26 words
The network according to claim 1 including, in addition, an input stage connected between said common signal source and the emitter electrode of said first transistor.
Claim 5
Dependent Claim
81 words
The network and input stage according to claim 3 wherein said input stage comprises: an input transistor connected in the common collector configuration; the base electrode of said input transistor constituting the input port of said stage; means, including a series resistance, for connecting the emitter electrode of said input transistor to the emitter electrode of the first distribution transistor; and a plurality of n matching resistors connected, respectively, between said n output ports and the emitter of said input transistor.
Claim 6
Dependent Claim
81 words
The network and input stage according to claim 3 wherein said input stage comprises: an input transistor connected in the common collector configuration; the base electrode of said input transistor constituting the input port of said stage; means, including a series resistance, for connecting the base electrode of said input transistor to the emitter electrode of the first distribution transistor; and a plurality of n matching resistors connected, respectively, between said n output ports And the emitter of said input transistor.
Claim 7
Dependent Claim
143 words
The network and input stage according to claim 3 wherein said input stage comprises: first and second parallel-connected signal paths; said first path including, in cascade, a matching resistor and a first transistor connected in the common base configuration; said second path including, in cascade, a second transistor connected in the common collector configuration and a matching resistor; the junction of said first matching resistor and the base electrode of said second transistor constituting the input port of said input stage; the junction of said second resistor and the collector electrode of said first transistor constituting the output port of said input stage; resistive means for coupling the output port of said input stage to the input port of said distribution network; and a plurality of n matching resistors connected, respectively, between said n output ports and the emitter of said second transistor.
Claim 8
Dependent Claim
58 words
The network and input stage according to claim 6 wherein said resistive means comprises a twowinding transformer wherein the output port of said input stage is connected to the input port of said distribution network through the primary winding of said transformer; and wherein the terminals of the secondary winding of said transformer constitute an additional output port.
Claim 9
Dependent Claim
21 words
The distribution network according to claim 1 including means for constructively recombining the signals in the output ports of said network.
Claim 10
Dependent Claim
15 words
The network according to claim 8 wherein said means for recombining comprises a hybrid-coupled fan-in.
Claim 11
Dependent Claim
18 words
The network according to claim 8 wherein said means for recombining comprises connecting said output ports in parallel.
Claim 12
Dependent Claim
29 words
The network according to claim 8 wherein said means for recombining comprises connected groups of transformer secondary windings in series, and connecting said series-connected groups of windings in parallel.
References Cited (Backward Citations)
US2860261A
Cited
US3097343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |