The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2010
Filed:
Sep. 02, 2008
Yoshihiro Amemiya, Kawasaki, JP;
Yoshihiro Amemiya, Kawasaki, JP;
Toshiba Storage Device Corporation, Tokyo, JP;
Abstract
A head IC, which adjusts an amplitude level of a read signal of a head, for outputting to a read channel having an AGC amplifier, includes: a differential amplifier; an AGC circuit; external gain setting sections; and a switch. Since the AGC amplifier is disposed in the head IC, the amplitude from the head is automatically adjusted in the head IC, and the signal level, which enters the input dynamic range of the AGC amplifier of the read channel, can be adjusted. The AGC amplifier can be operated as a fixed gain amplifier using a gain value which is set from the outside, so the power consumption can be minimized even if automatic adjustment is performed.