公开(公告)号：US20220224289A1

公开(公告)日：2022-07-14

申请号：US17513488

申请日：2021-10-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dongsu KIM ,  Sungyoub JUNG ,  Younghwan CHOO

IPC: H03F1/02 ,  H03F3/24

Abstract: A supply modulator includes a multi-level voltage generator configured to generate a plurality of power voltages having different voltage levels; a switch array including a plurality of switches respectively corresponding to the plurality of power voltages, and outputting one of the plurality of power voltages by activating connection of one of the plurality of switches; and a switch controller configured to control connection of each of the plurality of switches and activate connection of at least one third switch distinguished from a first switch and a second switch in response to receiving a level control signal switching the connection from the first switch to the second switch during a time period corresponding to a frequency to be attenuated between disconnecting the first switch and connecting the second switch.

公开(公告)号：US20180123458A1

公开(公告)日：2018-05-03

申请号：US15803395

申请日：2017-11-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ji Seon PAEK ,  Dongsu KIM ,  Younghwan CHOO

IPC: H02M3/158

CPC classification number: H02M3/158 ,  H03F1/0227 ,  H03F3/2173 ,  H03F3/24 ,  H03F2200/102

Abstract: A transmitting device including: a modem configured to generate a baseband signal and an envelope data corresponding to the baseband signal; a supply modulator including a first switched-mode power supplier and a second switched-mode power supplier, the supply modulator configured to provide a modulated voltage to an output node based on the envelope data; and a power amplifier configured to amplify a carrier wave signal by using the modulated voltages, the carrier wave signal being associated with the baseband signal, wherein the first switched-mode power supplier includes: a pulse input node to receive a pulse signal generated in association with the envelope data; and a plurality of stages sequentially connected between the pulse input node and the output node, the plurality of stages configured to adjust the modulated voltage by filtering certain frequency band of the pulse signal, and the plurality of stages includes at least one variable impedance.