Title:
【発明の名称】シグマ-デルタ帯域通過アナログ-デジタル変換器を備えた超音波流体流量測定法及び装置
Document Type and Number:
Japanese Patent JP2002533709
Kind Code:
A
Abstract:
An ultrasound apparatus for measuring a fluid flow rate includes a processor which receives an analog signal from a receiver transducer then transforms it into a digitized signal used for determining the fluid flow rate. The processor includes a bandpass sigma-delta converter having a bandpass loop filter, and a digital-to-analog converter in a feedback loop.
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Inventors:
Veneto Lionel
Benabe philippe
Benabe philippe
Application Number:
JP2000591392A
Publication Date:
October 08, 2002
Filing Date:
December 22, 1999
Export Citation:
Assignee:
Schlumberger Andustrie Society Anonym
International Classes:
G01F1/66; H03M3/02; (IPC1-7): G01F1/66; H03M3/02
Attorney, Agent or Firm:
Minoru Nakamura (9 outside)