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:
May. 03, 2011
Filed:
Sep. 10, 2007
Siraj Akhtar, Richardson, TX (US);
Mehmet Ipek, Dallas, TX (US);
Robert B. Staszewski, Garland, TX (US);
Siraj Akhtar, Richardson, TX (US);
Mehmet Ipek, Dallas, TX (US);
Robert B. Staszewski, Garland, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A novel and useful apparatus for and method of local oscillator generation employing an exception handling mechanism that permits an oscillator having a limited modulation range to handle the large modulation ranges demanded by modern wideband wireless standards such as 3G WCDMA, etc. A controllable oscillator generates an RF signal having four quadrature phases in accordance with an input command signal. An exception handler compares the frequency command information against a threshold. If it exceeds the threshold a phase jump and a residue frequency command are generated. The residue frequency command is input to an oscillator which is operative to generate an RF signal having four quadrature phases. The phase jump is input to a quadrature switch which functions to select one of the four quadrature phase signals as the output RF signal which is then fed to a digital power amplifier.