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. 06, 1994
Filed:
Nov. 16, 1992
Kei Nishioka, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
In an amplifying circuit of current subtraction type, a first output of a differential amplifier is coupled through a first transistor to an output electrode of an output-side transistor of a current mirror circuit and a second output of the differential amplifier is coupled through a second transistor to an input electrode and an output electrode of an input-side transistor of the current mirror circuit so that an output current based on a difference between the first output and the second output flows out from a connection of the first transistor and the output-side transistor of the current mirror circuit. A first circuit device for phase compensation is inserted between bases of input-side and output-side transistors of one of the first and second transistors, and a second circuit device for compensating a direct current offset generated by the first circuit device is .inserted between bases of input-side and output-side transistors of the other of the first and second transistors.