Search International and National Patent Collections

1. (WO2018182880) FEED-FORWARD ENVELOPE TRACKING

Pub. No.:    WO/2018/182880    International Application No.:    PCT/US2018/018912
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Thu Feb 22 00:59:59 CET 2018
IPC: H03F 1/02
H03F 3/189
H03F 3/24
H03F 3/68
H02M 3/158
Applicants: INTEL IP CORPORATION
Inventors: HENZLER, Stephan
MENKHOFF, Andreas
EICHLER, Thomas
WALTHES, Wolfgang
BELITZER, Alexander
WANG, Yifan
Title: FEED-FORWARD ENVELOPE TRACKING
Abstract:
An envelope tracking system (100) for controlling a power amplifier supply voltage includes envelope circuitry (150) and a feed forward digital to analog converter (DAC) circuitry (160). The envelope circuitry (150) is configured to generate a target envelope signal based on a selected power amplifier supply voltage. The feed forward DAC circuitry (160) includes a voltage source circuitry (170) and a selector circuitry (180). The voltage source circuitry (170) is configured to generate a plurality of voltages. The selector circuitry (180) is configured to select one of the plurality of voltages based at least on the target envelope signal. The feed forward DAC circuitry (160) is configured to provide the selected voltage to a supply voltage input of a power amplifier (PA) that amplifies a radio frequency (RF) transmit signal.