Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-04-18
2010-11-23
Dunn, Drew A (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C361S152000, C361S154000, C361S139000, C702S130000
Reexamination Certificate
active
07840365
ABSTRACT:
An integrated circuit arrangement for current regulation of an electromagnetic load, especially an electric motor, generator, solenoid valve, or the like, with a coil, a power switch element, and a freewheeling diode is disclosed. In one embodiment, the circuit arrangement has an integrated measurement resistor for measuring the coil current. The measurement resistor is arranged in a freewheeling path of the circuit arrangement in series between the freewheeling diode and the power switch element, and has a digital processing means connected after a voltage measurement device assigned to the measurement resistor for at least partial compensation of resistor manufacturing variations and/or temperature fluctuations in the voltage signal and/or an error due to analog voltage signal processing.
REFERENCES:
patent: 5673165 (1997-09-01), Kuhn et al.
patent: 5982161 (1999-11-01), Nguyen et al.
patent: 6294905 (2001-09-01), Schwartz
patent: 6313617 (2001-11-01), Engelmann et al.
patent: 20004909 (2001-07-01), None
Kahr Victor
Panhofer Harald
Steiner Manfred
Dicke Billig & Czaja, PLLC
Dunn Drew A
Infineon - Technologies AG
Vo Hien X
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