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:
Apr. 25, 2006
Filed:
Nov. 21, 2003
Kazue Takayoshi, Kagoshima, JP;
Michiya Sako, Kagoshima, JP;
Kazue Takayoshi, Kagoshima, JP;
Michiya Sako, Kagoshima, JP;
Sony Corporation, , JP;
Abstract
The present invention provides a magnetic recording and reproducing apparatus having an amplifier apparatus, which is switched from a recording state to a readout state based on a control signal, reads out a signal containing a servo signal by the signal readout means, and includes the amplifier apparatus for amplifying the signal with an amplifier and outputting the amplified signal. In addition, the amplifier apparatus filters the signals by the filtering means that allows the high frequency portion of signals to pass through with a first cutoff frequency during a first prescribed time period after the readout state has been initiated; a second cutoff frequency that is lower than the first cutoff frequency during a second prescribed time period after the first prescribed time period has passed; and a third cutoff frequency that is lower than the second cutoff frequency after the second prescribed time period has passed.