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11.发明公开Variable attenuation circuit for a differential variable reluctance sensor with temperature compensation for an initial threshold and passive RC filter 审中-公开可变衰减电路用于与温度补偿的差分Reluktanzgeber用于初始阈值和无源RC滤波器
公开(公告)号：EP1361444A3
公开(公告)日：2004-03-03
申请号：EP03076328.8
申请日：2003-05-05
Applicant: Delphi Technologies, Inc.
Inventor： Manlove, Gregory J. , Gertiser, Kevin M. , Bach, James C. , Kilgour, Gerald A.
CPC classification number: G01D5/2013 , G01D3/02 , G01P3/487 , G01P3/488 , G01P3/489
Abstract: A variable reluctance sensor interface module (25) having a variable attenuation circuit (24) and a rectifier and differential to single-ended conversion circuit (32) for operating in a current mode to attenuate a differential input voltage. The variable attenuation circuit (24) receives an input differential voltage from a magnetic sensor (15), converts the differential voltage to current, and variably attenuates the current. The rectifier and differential to single-ended conversion circuit (32) converts the variably attenuated current to a voltage output. The input circuit includes an RC filter (400) that attenuates high frequency signals. An initial threshold circuit (410) generates an initial threshold voltage that compensates for internal resistance variations, caused e.g. by temperature variations.
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