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. 05, 2006
Filed:
Jan. 24, 2003
Sunguk Kim, Seoul, KR;
Yongseok Kim, Seongnam-si, KR;
Sunguk Kim, Seoul, KR;
Yongseok Kim, Seongnam-si, KR;
Integrant Technologies Inc., Seongnam-si, KR;
Abstract
The present invention relates to a harmonic circuit for improving linearity, the harmonic circuit according to the present invention comprises a first terminal connected to a collector of a NPN transistor and a second terminal connected to an emitter of the NPN transistor, and removes inter-modulation noise from the signal appeared at the collector of the NPN transistor. The harmonic circuit includes a PNP transistor, a first resistor, and a second resistor. The PNP transistor generates harmonic components without affecting the main signal, and the harmonic components that are generated by the PNP transistor compensate the harmonic components that are generated by the NPN transistor by having load of different sign from the load of the harmonic components that are generated by the NPN transistor. In addition, the harmonic circuit further includes a phase shifter to compensate the phase distortion that is generated from non-linear devices, and it can reduce the inter-modulation noise more minutely by implementing the PNP transistor using a plurality of Darlington-connected PNP transistors.