| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a Coriolis flowmeter capable of designing a common driving circuit by changing an individual difference of a driving circuit itself and a driving parameter, also integrating the driving circuit into a computing unit inside, and attaining easily cost reduction and an additional function such as self-diagnosis. Ž<P>SOLUTION: A driving device for operating an electromagnetic oscillator is constituted of an OP amplifier for amplifying an analog input signal from an electromagnetic pick-off; an A/D converter for converting an analog signal outputted from the OP amplifier into a digital signal; a D/A converter for performing digital processing of a digital signal outputted from the A/D converter based on phase detection in a DSP (Digital Signal Processor), and converting the data amount of digital signals into analog signals; and a D/A converter for performing digital processing of a digital signal outputted from the D/A converter based on phase detection in the DSP, and converting the data amount of digital signals into analog signals. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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