专利名称：Method and device for improving the
sensitivity and the signal to noise ratio ofpiezo-electric transducers having a pluralityof sensors combined in parallel
发明人：Claude Beauducel,Thierry Gautier申请号：US07/064570申请日：19870622公开号：US04801838A公开日：19890131
摘要：A method and device are provided for improving the sensitivity and signal tonoise ratio of transducers including several piezo-electric sensors interconnected inparallel to the input of an electric charge amplifier, said process consisting essentially inreducing the electric capacity of the combination of parallel sensors at the input of theamplifier so as to reduce the amplification gain applied to the noise without changingthat which is applied to the signals picked up. This operation is achieved by means of animpedance transformer or else by means of at least one charge transfer capacitorconnected by at least one switch alternately to the sensors and to the capacitor of theamplifier.
申请人：INSTITUT FRANCAIS DU PETROLE
代理机构：Antonelli, Terry & Wands
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容