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. 25, 1984
Filed:
Mar. 25, 1983
Yoshiaki Sano, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A differential amplifier is basically comprised of first and second transistors (Q.sub.1, Q.sub.2) each having a negative resistance feedback. A current source (IP.sub.2) and a third transistor (Q.sub.3) connected in series are provided on the side of the first transistor, and a current source (IP.sub.3) and a fourth transistor (Q.sub.4) connected in series are provided on the side of the second transistor. The base and emitter of the first transistor are connected to the respective collector and base of the third transistor so that the potential at the base of the first transistor is negatively fed back to the emitter thereof. Similarly, the base and emitter of the second transistor are connected to the respective collector and base of the fourth transistor so that the potential at the base of the second transistor is negatively fed back to the emitter thereof.