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:
Oct. 05, 1999
Filed:
Jan. 16, 1998
Hitachi, Ltd., Tokyo, JP;
Abstract
A differential circuit having a relatively simple structure capable of delivering a linear transfer characteristic and expanding an input dynamic range. An increase in magnitude of differential input voltage V.sub.in applied to each gate of differential-pair MOSFETs M1 and M2 in the differential circuit decreases control voltage V.sub.CONT in a control circuit. On the other hand, since a current fed to MOSFETs M3 and M4 in the differential circuit decreases simultaneously, a current supplied to the differential-pair MOSFETs M1 and M2 in the differential circuit increases. Thus, the present invention makes it possible to effectively expand the input dynamic range with respect to differential input voltage V.sub.in.