Invention Grant
US07830633B2 Amplitude level controller for head IC, read circuit and media storage device
失效
头IC，读取电路和媒体存储设备的幅度电平控制器
- Patent Title: Amplitude level controller for head IC, read circuit and media storage device
- Patent Title (中): 头IC，读取电路和媒体存储设备的幅度电平控制器
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Application No.: US12199329Application Date: 2008-08-27
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Publication No.: US07830633B2Publication Date: 2010-11-09
- Inventor: Hajime Miura
- Applicant: Hajime Miura
- Applicant Address: JP Tokyo
- Assignee: Toshiba Storage Device Corporation
- Current Assignee: Toshiba Storage Device Corporation
- Current Assignee Address: JP Tokyo
- Agency: Greer, Burns & Crain, Ltd.
- Priority: JP2007-309679 20071130
- Main IPC: G11B5/02
- IPC: G11B5/02 ; G11B5/09
Abstract:
A head IC adjusts an amplitude level of a read signal of a head and outputs to a read channel having an AGC amplifier, includes an AGC amplifier. The AGC amplifier has a feedback loop control type first amplifier and a feed-forward control type second amplifier. The precision of control with respect to a target value is improved, and an AGC amplifier with fast response can be configured. Further, increases in the AGC pull-in type can be prevented, stability can be assured, and erroneous AGC judgments can be prevented.
Public/Granted literature
- US20090141386A1 HEAD IC, READ CIRCUIT AND MEDIA STORAGE DEVICE Public/Granted day:2009-06-04
Information query
IPC分类:
