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公开(公告)号：JP2003187402A
公开(公告)日：2003-07-04
申请号：JP2002327083
申请日：2002-11-11
Applicant: ST MICROELECTRONICS INC
Inventor： VENCA ALESANDRO , POSAT BARIS , OZANOGLU KEMAL , ALINI ROBERTO
Abstract: PROBLEM TO BE SOLVED: To provide a circuit and a method which comparatively rapidly transition a current flowing through a write head during normal operating conditions, without generating capacitively coupled noise. SOLUTION: A drive voltage signal which will not have a common mode voltage level in a transition period among the normal operating conditions in the write head is supplied to the write head. That is, the drive voltage signal impressed to the writing head is substantially and entirely differential during the transition period of a write head current. A driver circuit has the terminal of the write head and a switching circuit, connected between reference voltage supply sources such as positive and negative voltage sources. The driver circuit has a timing circuit for generating a controlling signal which controls the switching circuit. COPYRIGHT: (C)2003,JPO
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