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. 14, 1989
Filed:
Aug. 31, 1987
Akira Yamakoshi, Tokyo, JP;
Toyohiko Fujita, Tokyo, JP;
Kunihiko Tsukakoshi, Tokyo, JP;
Shinji Anraku, Tokyo, JP;
Seikosha Co., Ltd., Tokyo, JP;
Abstract
A current amplifier circuit has a first transistor with a collector and a base which are electrically connected, a second transistor connected in series with the first transistor and having a collector and a base which are electrically connected. A third and fourth transistor are connected in series with the collector of the first transistor connected to a base of the third transistor and the collector of the second transistor connected to a base of the fourth transistor through a resistor having a resistance R. The first, second, third and fourth transistors have the same polarity. An amplified output signal current R.multidot.i/R.sub.E is obtained from a collector of the third transistor, wherein R.sub.E is the emitter resistance of the fourth transistor and i is the input signal applied to the base of the fourth transistor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile