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:
Jul. 05, 2016
Filed:
Feb. 24, 2014
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Ossi Toivonen, Halikko, FI;
Sami Vilhonen, Lieto, FI;
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm, SE;
Abstract
A linearization circuit improves the linearity of a power amplifier based on an envelope of an input RF signal. The linearization circuit comprises an RF signal generation circuit, a replica circuit, and an adaptive amplifier. The RF signal generation circuit generates the RF signal from a phase and an amplitude of an input digital signal. The replica circuit extracts the envelope from the RF signal and generates a sensing voltage based on the extracted envelope. The adaptive amplifier generates an adaptive bias voltage for the power amplifier based on the sensing voltage, and applies the adaptive bias voltage to the power amplifier and to the replica circuit to improve the linearity of the power amplifier by regulating the power amplifier and the replica circuit according to the envelope.