公开(公告)号：US20130093431A1

公开(公告)日：2013-04-18

申请号：US13442975

申请日：2012-04-10

Applicant: Johan RAMAN ,  Pieter ROMBOUTS

Inventor： Johan RAMAN ,  Pieter ROMBOUTS

IPC: G01R31/00

CPC classification number: G01R31/003 ,  G01L1/144 ,  G01L1/2262 ,  G01L9/02 ,  G01L9/04 ,  G01L9/06 ,  G01L9/12 ,  G01R31/2829

Abstract: A difference measurement circuit including a first port and a second port for connection to a first set of nodes and a second set of nodes of a sensor unit. The circuit further includes switching units for switching excitation signals emanating from excitation nodes from being applied to the first set of nodes via the first port to being applied to the second set of nodes via the second port and for switching differential measurement signals measured at sensing nodes from being obtained from the second set of nodes via the second port to being obtained from the first set of nodes via the first port. A corresponding method is described. The circuit further includes redundancy testing circuitry for evaluating the similarity or deviation between measurement signals obtained in different states of the switching units.

Abstract translation: 差分测量电路，包括用于连接到第一组节点的第一端口和第二端口以及传感器单元的第二组节点。 该电路还包括用于切换从激励节点发出的激励信号经由第一端口被施加到第一组节点以经由第二端口被施加到第二组节点并且用于切换在感测节点处测量的差分测量信号的开关单元 从第二组节点经由第二端口获得经由第一端口从第一组节点获得。 描述相应的方法。 电路还包括用于评估在开关单元的不同状态下获得的测量信号之间的相似性或偏差的冗余测试电路。