MAGNETIC MEASURING DEVICE AND AD CONVERSION APPARATUS

PROBLEM TO BE SOLVED: To provide a magnetic measuring device having a plurality of magnetic sensors in which circuit size of its ΔΣ (delta-sigma) type ADC (Analog-to-Digital conversion apparatus) can be adjusted. SOLUTION: A ΔΣ modulator 22 in this device is delta-sigma modulated by input of sensor...

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Hauptverfasser:	HIROBE KIYO, SUZUKI HIROHISA, TAKAGI TAKASHI, HASEGAWA KAZUO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DECODING ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS RESONATORS TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a magnetic measuring device having a plurality of magnetic sensors in which circuit size of its ΔΣ (delta-sigma) type ADC (Analog-to-Digital conversion apparatus) can be adjusted. SOLUTION: A ΔΣ modulator 22 in this device is delta-sigma modulated by input of sensor signal from one of the plurality of magnetic sensors 8 switched with prescribed input switching cycles to be selected. A digital filter 24 generates measurement data based on the data oversampled at cycle T by the ΔΣ modulator 22. The digital filter 24 has a counter 34. For the selected magnetic sensor 8, this counter 34 accumulates the data input every cycle T to generate and output measurement data, while resetting any counted value for this magnetic sensor 8 to newly start accumulation for the next magnetic sensor 8 to be selected then. COPYRIGHT: (C)2010,JPO&INPIT