Field device electronics fed by an external electrical...

Details Field device electronics fed by an external electrical... Field device electronics fed by an external electrical...

2007-07-03

2009-12-08

Lau, Tung S (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C324S600000, C323S209000

Reexamination Certificate

active

07630844

ABSTRACT:
Field-device electronics including an electric current adjuster, through which a supply current flows is driven by a supply voltage provided by the external energy supply and adjusted by the current adjuster. Additionally, the field-device electronics includes an internal operating and evaluating circuit for controlling the field device, as well as an internal supply circuit feeding the internal operating and evaluating circuit. Provided in the supply circuit is a first useful-voltage controller flowed-through, by a first component of the supply current and a second useful-voltage controller flowed through, at least at times, by a second current component of the supply current and providing in the field-device electronics a second internal, useful voltage. The second useful voltage controller is fed by the first useful voltage delivered by the first useful voltage controller and/or a secondary voltage drived from the first useful voltage.

REFERENCES:
patent: 6397322 (2002-05-01), Voss
patent: 7200503 (2007-04-01), Lalla
patent: 2003/0076075 (2003-04-01), Ma et al.
patent: 41 13 433 (1992-01-01), None
patent: 2 148 559 (1985-05-01), None
patent: WO 02/103327 (2002-12-01), None
patent: WO 2004/048905 (2004-06-01), None
patent: WO 2006/072541 (2006-07-01), None

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