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:
Mar. 23, 2010
Filed:
Nov. 20, 2006
Jussi Vepsäläinen, Helsinki, FI;
Aarno Pärssinen, Espoo, FI;
Pauli Seppinen, Espoo, FI;
Mikael Gustafsson, Porvoo, FI;
Jussi Vepsäläinen, Helsinki, FI;
Aarno Pärssinen, Espoo, FI;
Pauli Seppinen, Espoo, FI;
Mikael Gustafsson, Porvoo, FI;
Nokia Corporation, Espoo, FI;
Abstract
A radio frequency receiver, includes a first component block; a second compensating component block-; and control circuitryoperable for controlling the state (e.g., load, bias, gain) of the first component block. When the control circuitrycauses a change in the state of the first component block that is expected to induce a DC offset in a signal, the control circuitrychanges the state of the second component block to compensate for an estimate of the DC offset. Preferably, the second component block is a filter-, that temporarily changes from a nominal cutoff frequency to an elevated cutoff frequency so that voltage will settle quickly and accurately at an estimated voltage, the estimated voltage being predetermined and based on the state change to the first component block. A method is also described for practicing the invention.