Electric power conversion systems – Current conversion – Having plural converters for single conversion
Reexamination Certificate
2009-09-10
2011-10-11
Berhane, Adolf (Department: 2838)
Electric power conversion systems
Current conversion
Having plural converters for single conversion
C363S069000
Reexamination Certificate
active
08036007
ABSTRACT:
A bus connection for connecting a field device to a field bus whereby the bus connection has a circuit for sending and receiving databus signals and for generating at least one regulated operating voltage, and the regulated operating voltage is generated from a bus voltage supplying the field bus, characterized in that a controllable resistor is provided for generating an additional operating voltage; circuitry means are provided, controlling the controllable resistor as a function of the bus voltage such that the input voltage of the circuit is regulated at its minimum required power supply voltage; and the sum of the regulated operating voltage and the additional operating voltage is supplied to the field device as the power supply voltage.
REFERENCES:
patent: 6172885 (2001-01-01), Feldtkeller
patent: 6809678 (2004-10-01), Vera et al.
patent: 7230219 (2007-06-01), Miyazaki et al.
patent: 2004/0022074 (2004-02-01), Takamatsu
patent: 2005/0231989 (2005-10-01), Shao et al.
patent: 2008/0174178 (2008-07-01), Jakobsson et al.
patent: WO 96/04735 (1996-02-01), None
Berhane Adolf
Burns Robert T.
Meyer Jerald L.
The Nath Law Group
Tran Nguyen
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