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. 30, 2003
Filed:
Nov. 07, 2000
Edward L. Henderson, Atkinson, NH (US);
Samuel H. Nork, Andover, MA (US);
Linear Technology Corporation, Milpitas, CA (US);
Abstract
The present invention provides radio frequency (RF) power controllers that regulate the power output signal of an RF power amplifier using a control signal. The RF power controller includes a power control amplifier that measures the difference between a feedback signal and a power control input signal to supply the control signal to the RF power amplifier. The output power signal is amplitude modulated for a period of time during an enable mode. During the amplitude modulation period, the RF power controller opens the power control loop and maintains a substantially constant output voltage to the RF power amplifier using a second amplifier and a capacitor coupled to power control amplifier. The capacitor is decoupled from the power control amplifier during the amplitude modulation period, and the second amplifier supplies the output voltage of the RF power controller based upon the stored voltage on the capacitor.