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Title: Four-wire, eight-leg bridge

Abstract: A 4-wire, 8-leg resistance bridge for interconnecting up to eight stations in a full conference system includes a two line input port and an associated two line output port for each of eight 4-wire telecommunication transmission lines. By providing a certain pattern of straight and rollover (reverse) connections between various pairs of the lines in the bridge, an essentially infinite return loss between the input and output ports of each leg is achieved. In addition, the bridge has a uniform natural loss between each leg's input port and the output ports of the other legs, and provides the proper terminating impedance for each of the interconnected transmission lines.


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Inventors: Johnson, Bill E. (Portland, OR, US)
Dannenmann, Jr., John E. (Portland, OR, US)

Application Number: 890387
Filing Date: 1978-03-27
Publication_date: 1979-02-20
Assignee: Bejed, Inc. (Portland, OR)
Primary Class(es): 333/130 379/206.01
Other Classes:
US Patent Ref:
2182192Dec, 1939Becker333/6.

Other Refs: 1353367
May, 1974GB

Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Kemeny, E. S.
Attorney: