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. 02, 1993
Filed:
Nov. 12, 1991
Haruyuki Inohana, Saitama, JP;
Shintaro Gomi, Saitama, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A differential amplifier comprises: first and second transistors the emitters of which are connected to each other through a resistance element; a third transistor to the emitter of which a current equal to the collector current of the first transistor is applied; and a fourth transistor to the emitter of which a current equal to the collector current of the second transistor is applied. Signals provided at the emitters of the third and fourth transistors, after being level-shifted, are supplied to the bases of the second and first transistors, respectively. Thereby, a differential amplifier which is linear in transfer characteristic and large in input dynamic range is obtained.