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. 16, 2010
Filed:
Aug. 05, 2008
Hisao Suzuki, Kasugai, JP;
Hisao Suzuki, Kasugai, JP;
Fujitsu Microelectronics Limited, Tokyo, JP;
Abstract
A differential amplifier circuit of simple circuit configuration is disclosed, which is capable of releasing an output signal within a voltage range independent of the voltage range of a differential input signal. The differential amplifier circuitincludes: NMOS transistors N, Nthat constitute a first differential pair configured to input a differential input voltage; a resistor element Ra connected to drain terminals X, Xof the NMOS transistors N, N; an op-amp OP having input terminals connected to the drain terminals X, X; and NMOS transistors N, Nthat constitute a second differential pair configured to input an output voltage of the op-amp OP and a reference voltage. The drain terminals of the first differential pair are connected to drain terminals, respectively, of the second differential pair.