Control and supervisory signal transmission system

Details Control and supervisory signal transmission system Control and supervisory signal transmission system

2004-09-01

2008-09-23

Pham, Chi H. (Department: 2616)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

Reexamination Certificate

active

07428251

ABSTRACT:
An intermediate station transmits a supervisory signal sent form a given controlled device to a controlled device associate with the given device as a control signal. An intermediate-station input unit extracts a supervisory signal, which is a current signal superimposed on a signal transmitted through a data signal line, in every clock cycle. An intermediate-station output unit obtains the supervisory signal in every clock cycle, and outputs a control signal, which is a pulse-width-modulated voltage signal, onto the data signal line in the same clock cycle in which the supervisory signal has been extracted.

REFERENCES:
patent: 4627047 (1986-12-01), Pitroda et al.
patent: 2005/0013310 (2005-01-01), Banker et al.
patent: 64-72623 (1989-03-01), None
patent: 64-89839 (1989-04-01), None
patent: 3-6997 (1991-01-01), None
patent: 2003-199178 (2003-07-01), None

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