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. 25, 2007
Filed:
Jun. 05, 2001
Patrice Hirtzlin, Rennes, FR;
Jean-yves Le Naour, Pace, FR;
Patrick Wurm, Cambridge, GB;
Thomson Licensing, Boulogne-Billancourt, FR;
Abstract
The invention provides a simple solution for a broadband transmitter/receiver for which the working bandwidth is split into at least two non-contiguous sub-bands. The invention uses a filtering meanswhich comprises at least two band-pass filtersandprovided with switching meansandThe use of two switched filtersandmakes it possible to use a single synthesizerto scan two sub-bands of the working bandwidth. The frequency synthesizeroperates for one sub-band in supradyne mode and for the other sub-band in infradyne mode. In a variant, the invention uses a third filter and divides the bandwidth into three sub-bands.