Serial signal transmission device and control method for determining polarity

Patent 5257160 Issued on October 26, 1993. Estimated Expiration Date:

April 11, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Transceiver polarity protector
Patent #: 4027223
Issued on: 05/31/1977
Inventor: Renz

System for identifying and correcting the polarity of a data signal
Patent #: 4176248
Issued on: 11/27/1979
Inventor: Sheets

Circuit arrangement for serial data transmission between a plurality of subscriber stations
Patent #: 4785465
Issued on: 11/15/1988
Inventor: Lang , et al.

Circuit arrangement for serial data transmission between a plurality of subscriber stations
Patent #: 4807249
Issued on: 02/21/1989
Inventor: Lang , et al.

Local access network signal regnerator
Patent #: 4943979
Issued on: 07/24/1990
Inventor: Webber, Jr.

Signal regenerator for two-wire local area network Patent #: 5119398
Issued on: 06/02/1992
Inventor: Webber, Jr.

Inventors

Assignee

Mitsubishi Jukogyo Kabushiki Kaisha

Application

No. 651260 filed on 04/11/1991

US Classes:

361/246, Automatic178/3, Automatic375/257CABLE SYSTEMS AND COMPONENTS

Examiners

Primary: Gaffin, Jeffrey
Assistant: Elms, Richard

Foreign Patent References

0235649 EP. 09/12/1987
49-40405 JP. 04/12/1974
52-11806 JP. 01/12/1977
57-2218 JP. 01/12/1982

International Classes

H04B 003/02
H04L 025/00

Foreign Application Priority Data

1989-10-25 JP

Abstract

A serial signal transmission device and a control method for determining polarity which can be used in various systems, for example, air conditioners, and a remote controller. The serial signal transmission device which carries out signal transmission between a plurality of control devices uses two transmission wires with fixed polarity, the serial transmission interface of each control device is equipped with two pairs of differential drivers and receivers, and the driver outputs and receiver inputs of different polarity in these two pairs of drivers and receivers are connected to each other. This device and control method make connection terminals for signal lines on each control device nonpolar, considerably reducing workload required for installing the apparatuses and wiring and eliminating connection errors.