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专利名称：Multi-stage equalisation method and
apparatus for use in telemetry
发明人：Jonathan Thursby,Sumanth Eadala,Jonathan
Brian Rudd
申请号：US14769695申请日：20140228公开号：US09621223B2公开日：20170411
专利附图：
摘要：The present invention relates to inspection apparatus for use in wellbores in theoil and gas industries. In particular the invention relates in general to the field of
transmission of data between downhole module in a wellbore and a controlling moduleat the surface. The invention provides a method and apparatus for determining analogfilter parameters for an analog front end comprising a plurality of filter stages receivingsignals from a telemetry module, by repeating the steps of; receiving a signal of a knownfrequency and processing said signal by determining the magnitude of the frequency ofthe received signal until a plurality of signals have been received and processed;calculating an optimum set of filter parameters in dependence upon the measuredfrequency magnitudes and a predefined set of filter stage frequency responses.
申请人：E.V. Offshore Limited
地址：Norwich GB
国籍：GB
代理机构：Hayes Soloway PC
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