US 11,984,921 B2
Supply modulator and wireless communication apparatus including the same
Dongsu Kim, Hwaseong-si (KR); and Junsuk Bang, Hwaseong-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Apr. 13, 2023, as Appl. No. 18/300,006.
Application 18/300,006 is a continuation of application No. 17/503,632, filed on Oct. 18, 2021, granted, now 11,652,501.
Claims priority of application No. 10-2021-0005395 (KR), filed on Jan. 14, 2021.
Prior Publication US 2023/0246662 A1, Aug. 3, 2023
Int. Cl. H04B 1/16 (2006.01); H03F 1/02 (2006.01); H03F 3/24 (2006.01); H04B 1/04 (2006.01); H04B 1/18 (2006.01)
CPC H04B 1/1615 (2013.01) [H04B 1/04 (2013.01); H04B 1/18 (2013.01); H04B 2001/0408 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A supply modulator driven to apply an output voltage to a power amplifier, the supply modulator comprising:
a switching regulator outputting a first current to generate the output voltage in a discrete level envelope tracking mode or an average power tracking mode;
a multiple output voltage balancer operating together with the switching regulator in the discrete level envelope tracking mode, and configured to output a plurality of voltages having different levels of which the difference is equally adjusted based on the first current received from the switching regulator;
a switch array comprising a plurality of switches respectively corresponding to the plurality of voltages having different levels output from the multiple output voltage balancer, and configured to select one of the plurality of voltages having different levels and apply the selected voltage to the power amplifier; and
a main controller configured to select one of the average power tracking mode and the discrete level envelope tracking mode, and control the multiple output voltage balancer based on the selected tracking mode,
wherein, in the discrete level envelope tracking mode, the output voltage is generated based on a sum current of the first current and a second current provided through the switch array.