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:
Sep. 24, 2013
Filed:
Jun. 24, 2010
Kouichi Nishimura, Kanagawa, JP;
Toshikazu Murata, Kanagawa, JP;
Kouichi Nishimura, Kanagawa, JP;
Toshikazu Murata, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A differential amplifier circuit includes: an NMOS transistor pair connected with a non-inversion input terminal and an inversion input terminal; a PMOS transistor pair connected with the non-inversion input terminal and the inversion input terminal; and an output circuit section. The PMOS transistor pair includes first and second PMOS transistors, and the NMOS transistor pair includes first and second non-doped type NMOS transistors as a depletion type of NMOS transistors in which a channel region is formed in a P-type substrate without a P well. The output circuit section includes a first current mirror of a folded cascode type connected with the first and second non-doped type NMOS transistors, and outputs an output voltage in response to a current from the first current mirror.