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. 20, 2011
Filed:
Jan. 22, 2004
Jussi-pekka Tervaluoto, Oulu, FI;
Antti Ruha, Oulu, FI;
Tarmo Ruotsalainen, Oulu, FI;
Nokia Corporation, Espoo, FI;
Abstract
The invention relates to a mixer circuitcomprising a down-conversion mixing componentarranged for down-converting an input radio frequency signal Irf+, Irf−. In order to improve such a mixer circuit, it is proposed that it comprises in addition an active mixer load circuitconnected to output terminals of the mixing component. The active mixer load circuit includes an active mixer load, T, Tand modulating means S-Sarranged for modulating a flicker noise produced by the active mixer load away from the signal band of a signal Ibb+, Ibb− output by the down-conversion mixing component. The invention relates equally to a receiver, a chip and a device comprising such a mixer circuit and to a method for use with such a mixer circuit.