Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With coupling means
Reexamination Certificate
2000-12-27
2003-11-11
Oda, Christine K. (Department: 2858)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With coupling means
C324S096000, C324S09900D, C702S060000
Reexamination Certificate
active
06646430
ABSTRACT:
This invention relates to a current sensor intended for use in an electrical apparatus such as a residual current detection device, a current meter or a power meter.
BACKGROUND OF THE INVENTION
It is an object of the present invention to provide a current sensor in an economical form.
SUMMARY OF THE INVENTION
In accordance with the invention there is provided a current sensor comprising a metallic link member having two end portions of conductive material and an intermediate portion interconnecting the end portions, said intermediate portion being formed of a resistive material, and an integrated circuit analog to digital converter mounted on said link member, said converter having analog input terminals connected to respective ones of said two end portions and digital output terminals for connection to a processing apparatus.
Conveniently, the converter is attached to the intermediate portion by a layer of electrically insulative adhesive material and the analog input terminals of the converter are connected to the end portions by wire bonds.
The converter preferably includes a delta-sigma modulator which provides a high frequency one-bit digital data. One or more decimation filtering stages may be included in the converter.
The converter may also have a voltage reference terminal for connection to a reference voltage source, the converter operating to provide digital output signals respectively representing the current flowing through said intermediate portion and digital output signals representing the voltage on one of said end portions.
REFERENCES:
patent: 1257514 (1918-02-01), Meyer
patent: 1807852 (1931-06-01), MacGahan
patent: 3428896 (1969-02-01), Schweitzer
patent: 4009477 (1977-02-01), Rozylowicz
patent: 4823075 (1989-04-01), Alley
patent: 4922606 (1990-05-01), Alexander et al.
patent: 5041780 (1991-08-01), Ripple
patent: 5083081 (1992-01-01), Barrault et al.
patent: 5287107 (1994-02-01), Gampell et al.
patent: 5426416 (1995-06-01), Jefferies et al.
patent: 5436858 (1995-07-01), Staver
patent: 5463569 (1995-10-01), Staver et al.
patent: 5483173 (1996-01-01), Pellegrini
patent: 5589766 (1996-12-01), Frank et al.
patent: 5650951 (1997-07-01), Staver
patent: 5677845 (1997-10-01), Staver et al.
patent: 5701253 (1997-12-01), Mayell et al.
patent: 5867054 (1999-02-01), Kotowski
patent: 5875087 (1999-02-01), Spencer et al.
patent: 5929609 (1999-07-01), Joy et al.
patent: 6023160 (2000-02-01), Coburn
patent: 6034521 (2000-03-01), Eckardt
patent: 6058354 (2000-05-01), Adame et al.
patent: 6233532 (2001-05-01), Boudreau et al.
patent: 0445048 (1991-02-01), None
patent: 0612081 (1994-02-01), None
patent: 0848258 (1997-12-01), None
patent: 2318002 (1998-08-01), None
Crosier Mark David
Murray Martin Anthony
Reeder Brian Martin
Skerritt Robert Charles
Amster Rothstein & Ebenstein
Delta Electrical Limited
Hamdan Wasseem H.
Oda Christine K.
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