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专利名称：Magnetic transducer having a common core
for erasing and recording
发明人：Orton, Gregory A.申请号：EP91112854.4申请日：19881017公开号：EP0457372A3公开日：19920219
专利附图：
摘要：A magnetic transducer comprises: an E-shaped magnetically permeable corepart (21) having central, back and outer arms and having a first coil (22) linked with thecentral arm and having the back and outer arms passing around the outside of said first
coil and defining with the central arm two pairs of confronting pole piece portionsconstituting a pair of erasing transducing gaps (27,29) of low magnetic permeability. Afurther core part (52) extends from the back arm to form a transducing gap (53) with oneof said outer arms of the E-shaped part. The further core part is linked with a second coil(56), the back arm of said core member having two control coils (81,82) each linked withone of two magnetic circuits including the central arm and a respective one of the saidouter arms. An associated control circuit (83,84) is provided for increasing an impedanceassociated with one of the control coils and decreasing an impedance associated with theother of the control coils so as to increase the magnetic flux in one of the erasing gapsand to decrease the magnetic flux in the other of the erasing gaps.
申请人：AMPEX SYSTEMS CORPORATION
地址：401 Broadway M-S 3-35 Redwood City, California 94063-3199 US
国籍：US
代理机构：Horton, Andrew Robert Grant
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