Transmission interface conversion device

Details Transmission interface conversion device Transmission interface conversion device

2005-09-20

2005-09-20

Huynh, Kim (Department: 2182)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus interface architecture

37, C710S051000

Reexamination Certificate

active

06948023

ABSTRACT:
The present invention provides a transmission interface conversion device, which can first convert the communication signal of a master equipment controller and then connect to a plurality of slave devices through a pair of transmission lines so as to perform data transmission and power supply synchronously. The transmission interface conversion device includes: a conversion interface, formed by at least one repeater circuit, which transmits data by half-duplex; a signal inspector, which inspects whether a signal has been transmitted to the conversion interface; a control unit, to determine the orientation and the operation method of the repeater circuit by using the signal that has been inspected by the signal inspector; and a voltage adjustor, to supply needed electric power to all the above-mentioned circuits. The invention has features of being installed and maintained easily as well as being able to reduce the cost of cabling.

REFERENCES:
patent: 4734919 (1988-03-01), Tae
patent: 5148144 (1992-09-01), Sutterlin et al.
patent: 5648984 (1997-07-01), Kroninger et al.
patent: 5956523 (1999-09-01), Chen
patent: 6230224 (2001-05-01), Kim
patent: 6401159 (2002-06-01), Wang
patent: 6553076 (2003-04-01), Huang
RS422/485 Application Note, Chapters 1-3, www.bb-electronic.com/tech_articles, no date.

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