Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-04-03
2007-04-03
Nghiem, Michael (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
Reexamination Certificate
active
11319619
ABSTRACT:
An electric current controller for field-device electronics controls and/or modulates the supply current. The supply current is driven by a supply voltage provided by an external energy supply. The field-device electronics has an internal operating and evaluating circuit for controlling the field device, as well as an internal supply circuit, the internal input voltage being derived from the supply voltage for feeding the internal operating and evaluating circuit. In the supply circuit is a voltage controller flowed-through, at least at times, by a first component of the supply current. The voltage controller provides in the field-device electronics a first internal, useful voltage controlled to be essentially constant at a predetermined, first voltage level. Moreover, the supply circuit has a second voltage controller flowed through, at least at times, by a second current component of the supply current. The second voltage controller provides in the field-device electronics a second internal. Useful voltage, which is variable over a predetermined voltage range.
REFERENCES:
patent: 6397322 (2002-05-01), Voss
patent: 2003/0076075 (2003-04-01), Ma et al.
patent: WO 02/103327 (2002-12-01), None
Endrss + Hauser Flowtec AG
Lau Tung S.
Nghiem Michael
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