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:
Feb. 28, 2012
Filed:
Mar. 27, 2009
Robert Bogdan Staszewski, Garland, TX (US);
Khurram Waheed, Plano, TX (US);
Sudheer K. Vemulapalli, Allen, TX (US);
Manouchehr Entezari, Highland Village, TX (US);
Imran Bashir, McKinney, TX (US);
Robert Bogdan Staszewski, Garland, TX (US);
Khurram Waheed, Plano, TX (US);
Sudheer K. Vemulapalli, Allen, TX (US);
Manouchehr Entezari, Highland Village, TX (US);
Imran Bashir, McKinney, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An embodiment of the present invention provides transmitter having a phase locked loop that has a dynamically controllable loop bandwidth. A transmit modulator is coupled to the PLL for performing vector modulation in response to transmission symbols. Each transmission symbol comprises an amplitude signal and a phase signal. A controller is coupled to the PLL and to the transmit modulator and is operable to detect when a criteria of the transmission symbols crosses a threshold and to adjust loop bandwidth in response to crossing the threshold. The criteria of the transmission symbols may be a function of the amplitude signal or a function of the phase signal, and may be the amplitude signal, a first derivative of the amplitude signal, a second derivative of the amplitude signal, a square of the amplitude signal, a derivative of the amplitude signal squared, the phase signal, or a derivative of the phase signal.