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. 26, 2019
Filed:
Oct. 20, 2015
Sony Corporation, Tokyo, JP;
Hiroshi Nakao, Kanagawa, JP;
Yukihiro Yasui, Kanagawa, JP;
SONY CORPORATION, Tokyo, JP;
Abstract
A differential amplifier which does not have an effect of noise resistance deterioration, waveform distortion, and a lower bandwidth while having a wide input range is realized. The differential amplifier does not cause deterioration in a signal quality due to an increase in an input load, and it is not necessary to additionally provide a configuration for generating a reference voltage. The differential amplifier includes a differential amplification circuit and an output circuit for amplifying and outputting a differential output from the differential amplification circuit. The differential amplification circuit includes a first conductive type first differential pair which supplies output currents according to a positive phase input signal and a reverse phase input signal to the output circuit, a second conductive type second differential pair which supplies output currents according to a positive phase input signal and a reverse phase input signal to the output circuit, a detector which detects an operation state of a differential pair, and an alternative current supplying circuit which supplies an alternative current for the output current of the differential pair which has been turned off to the output circuit.