Patent · US Active

Feed-forward envelope tracking

US10090808B1 · kind B1 · utility

52Cited by

2References

22Claims

0Family size

Assignee

Intel IP Corporation · US

Inventors

Stephan Henzler · Munich, DE
Andreas Menkhoff · Oberhaching, DE
Thomas Eichler · Munich, DE
Wolfgang Walthes · Munich, DE
Alexander Belitzer · Munich, DE
Yifan Wang · Puchheim, DE

Key dates

Filing date	Mar 30, 2017
Grant date	Oct 2, 2018
Priority date	—
Expiry date	Mar 30, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2200/511
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

An envelope tracking system for controlling a power amplifier supply voltage includes envelope circuitry and a feed forward digital to analog converter (DAC) circuitry. The envelope circuitry is configured to generate a target envelope signal based on a selected power amplifier supply voltage. The feed forward DAC circuitry includes a voltage source circuitry and a selector circuitry. The voltage source circuitry is configured to generate a plurality of voltages. The selector circuitry is configured to select one of the plurality of voltages based at least on the target envelope signal. The feed forward DAC circuitry is configured to provide the selected voltage to a supply voltage input of a power amplifier that amplifies a radio frequency (RF) transmit signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.