Duplex system using a single transmission line

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United States of America Patent

PATENT NO 5440543
SERIAL NO

08146741

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A signal transmitter-receiver system comprising first and second transmitter-receiver units interconnected by a signal transmission line, a first transmitter-receiver unit including a first transmission circuit for delivering a selected one of a plurality of a.c. signals each having a distinct phase difference with respect to a reference a.c. signal to the signal transmission line at each of successive predetermined communication time interval, the second transmitter-receiver unit including a second receiving circuit for identifying the phase difference of the a.c. signal or the signal transmission line with respect to the reference a.c. signal at each communication time interval, the second transmitter-receiver unit including a second transmission circuit for changing the combination of positive and negative amplitudes of the a.c. signal on the signal transmission line to one of a plurality of states at each communication time interval, the first transmitter-receiver unit including a first receiver circuit for identifying the state of the combination of positive and negative amplitudes of the a.c. signal of the signal transmission line at each communication time interval.

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Patent Owner(s)

Patent OwnerAddress
NAKANISHI METAL WORKS CO LTD3-3-5 TENMABASHI KITA-KU OSAKA-SHI OSAKA 530-8566

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wakabayashi, Takao Osaka, JP 28 343

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