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:
Mar. 31, 1998
Filed:
Nov. 14, 1996
Fujitsu Limited, Kanagawa, JP;
Abstract
An amplifying circuit is suitable for an integrated circuit that has a characteristic of low-noise, high-gain, and low-consumptive current. In the circuit, transistors or FETs are used as amplifying elements. A basic amplifying circuit employing transistors, that forms a differential pair of first and second transistors, first and second resistors connected to each collector of the first and second transistors, and a constant current source connected to a common emitter of the first and second transistors, comprises a third transistor, of which emitter is connected to a connecting point of the first and second resistors, a condenser connected between a connecting point of the first transistor and the first resistor, or a connecting point of the second transistor and the second resistor, and a base of the third transistor, and a voltage source connected to a collector of the third transistor, wherein outputs are obtained from an emitter of the third transistor.