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:
May. 22, 2012
Filed:
Aug. 04, 2010
Ryo Mochizuki, Fuchu, JP;
Ryo Mochizuki, Fuchu, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a variable attenuator is arranged in an input stage, a plurality of transistors are cascaded on the later part of this variable attenuator, temperature sensors are arranged in the vicinity of two or more of the plurality of transistors to detect temperatures, the amount of gain change of the plurality of transistors is calculated from the temperature detection results individually obtained by the temperature sensors, the variable attenuator is controlled in such a manner as to reduce the amount gain change so that the input signal level can be controlled, and thereby the gain that tends to vary in accordance with temperature changes can be stabilized.