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:
Oct. 03, 2006
Filed:
Oct. 31, 2001
Brian J. Minnis, Crawley, GB;
Paul A. Moore, Seaford, GB;
Brian J. Minnis, Crawley, GB;
Paul A. Moore, Seaford, GB;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A radio receiver configurable to operate in either a low-IF or a zero-IF mode comprises a quadrature down-converter () for generating in-phase (I) and quadrature (Q) signals at an intermediate frequency and a complex filter () for performing image rejection filtering. One of the outputs (Q) of the filter () is terminated, the other (I) is passed to a non-complex ADC (). The output from the ADC is processed digitally then a quadrature signal generator () generates quadrature-related IF signals which are passed to a down-converter () for conversion to baseband signals. By enabling analogue-to-digital conversion and channel filtering to be performed at IF on non-complex signals, significant power savings are possible. Further, the flexibility of the receiver is enhanced, enabling it to operate efficiently in both low-IF and zero-IF modes.