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:
Aug. 02, 2005
Filed:
May. 22, 2002
Robert B. Staszewski, Garland, TX (US);
Dirk Leipold, Plano, TX (US);
Kenneth J. Maggio, Dallas, TX (US);
Robert B. Staszewski, Garland, TX (US);
Dirk Leipold, Plano, TX (US);
Kenneth J. Maggio, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Efficient PAM transmit modulation is provided by a PAM modulator that includes an oscillator () that provides a clock signal, CKV, (). The clock signaland a delayed version (CKV_DLY)of the clock signal are provided to a logic gate (). The output of logic gate () is used as a power amplifier input signal (PA_IN) for radio frequency power amplifier (). Depending on the relative time delay of the CKV clock signal () and the CKV_DLY delayed clock signal (), the timing and duty cycle of the logic gate () duty cycle can be controlled. The duty cycle or pulse-width variation affects the turn-on time of the power amplifier (); thereby establishing the RF output amplitude.