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:
Jun. 15, 2010
Filed:
Dec. 23, 2008
Kouichiro Yamaguchi, Osaka, JP;
Kouichiro Yamaguchi, Osaka, JP;
Icom Incorporated, , JP;
Abstract
A differential amplifier comprises a left amplifier having transistors, a right amplifier having transistors, a negative feedback network having a resistor, and a negative feedback network having a transformer with a center tap. Phase compensation networks comprising a capacitor and a resistor, a capacitor and a resistor, and a capacitor and a resistor are further added to the amplifier. Both ends of a secondary winding of the transformer are connected to the output terminals of the right and left amplifiers, and the center tap of the secondary winding is grounded, so that a differential amplified output signal can be fed back to a single-phase input using one transformer, thereby reducing a cost and an area.