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:
Jul. 26, 2011
Filed:
Aug. 14, 2008
Ronald C. Alford, Austin, TX (US);
Leo G. Dehner, Austin, TX (US);
Richard B. Meador, Austin, TX (US);
Christian J. Rotchford, Phoenix, AZ (US);
Ronald C. Alford, Austin, TX (US);
Leo G. Dehner, Austin, TX (US);
Richard B. Meador, Austin, TX (US);
Christian J. Rotchford, Phoenix, AZ (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A technique for calibrating a transceiver of a wireless communication device includes selectively coupling an output node of a transmitter of the transceiver to an input node of a receiver of the transceiver. A calibration signal is provided, from the output node of the transmitter, to the input node of the receiver. The calibration signal is down-converted, with the receiver, to provide a down-converted calibration signal. A discrete Fourier transform is performed on the down-converted calibration signal. Finally, one or more correction factors are determined based on an analysis of the discrete Fourier transform of the down-converted calibration signal. At least one of the correction factors is utilized to facilitate substantial cancellation of a direct current offset associated with the transceiver.