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:
Jan. 30, 2007
Filed:
Oct. 14, 2004
Yoshihisa Amano, Nara, JP;
Yoshihisa Amano, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Between an output terminal (drain terminal) of a semiconductor device in a first unit amplifier and an output port, a −90 degrees phase-shift circuit is connected, while between an output terminal (drain terminal) of a semiconductor device in a second unit amplifier and the output port, a +90 degrees phase-shift circuit is connected. Between the first and second ports, there is inserted a series circuit made up of first and second inductance components with an almost identical size. Then, to a middle point between the first and second inductance components, a bias feed terminal is connected, and between the middle point and a ground, a series circuit made up of a resistance component and a capacitance component is connected. The small-size balanced amplifier circuit can perform accurate balance operation in wide bands.