发明授权
- 专利标题： Method and apparatus for protecting magnetoresistive heads from electrostatic discharge
- 专利标题（中）： 用于保护磁阻头免受静电放电的方法和装置
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申请号： US11099214申请日： 2005-04-05
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公开(公告)号： US07502207B2公开(公告)日： 2009-03-10
- 发明人: Jason A. Christianson , Michael John O'Brien , Cameron Carroll Rabe , Carl F. Elliott
- 申请人： Jason A. Christianson , Michael John O'Brien , Cameron Carroll Rabe , Carl F. Elliott
- 申请人地址： US PA Allentown
- 专利权人： Agere Systems Inc.
- 当前专利权人： Agere Systems Inc.
- 当前专利权人地址： US PA Allentown
- 代理机构： Priest & Goldstein, PLLC
- 主分类号： G11B5/127
- IPC分类号： G11B5/127 ; G11B5/55
摘要：
An apparatus and method for providing electrostatic discharge protection for a disc drive read head. A pair of depletion mode MOSFETS, and a fuse associated with each are disposed between the read head output terminals. The MOSFETS are controlled to an “off” state for testing the preamplifier prior to assembly of the read head. After assembly of the head, a second pair of MOSFETS is gated to an “on” state to open the fuses and thus permit normal operation of the read head.