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:
Feb. 25, 1997
Filed:
Apr. 12, 1996
Yuji Yoshida, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A transimpedance amplifier has an amplifier unit, a feedback resistor arranged between the output and input ends of the amplifier unit, a voltage clamp unit connected to the opposite ends of the feedback resistor, to clamp a voltage applied to the ends of the feedback resistor and prevent the amplifier unit from saturating, a current absorption unit arranged on the input side of the amplifier unit, to absorb any large input current supplied to the amplifier unit, and a switching selection unit to activate or deactivate the current absorption unit according to an external control signal. The current absorption unit is activated through the switching selection unit when a large input current is produced to write data to a magneto-optic disk in a magneto-optic disk unit in which the transimpedance amplifier is installed.