US 11,843,398 B2
Voltage protection circuit to prevent power amplifier burnout, and electronic device having the same
Hyunseok Choi, Gyeonggi-do (KR); Jooseung Kim, Gyeonggi-do (KR); Namjun Cho, Gyeonggi-do (KR); and Hyoseok Na, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on Dec. 23, 2021, as Appl. No. 17/561,101.
Application 17/561,101 is a continuation of application No. 16/832,495, filed on Mar. 27, 2020, granted, now 11,211,955.
Claims priority of application No. 10-2019-0036993 (KR), filed on Mar. 29, 2019.
Prior Publication US 2022/0116060 A1, Apr. 14, 2022
Int. Cl. H04B 1/04 (2006.01); H03F 3/24 (2006.01)
CPC H04B 1/04 (2013.01) [H03F 3/245 (2013.01); H03F 2200/294 (2013.01); H03F 2200/451 (2013.01); H04B 2001/0408 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a first antenna;
a first power amplifier (PA);
a first low noise amplifier (LNA);
a switch electrically connected to the first antenna, the first antenna being selectively connected to the first PA or the first LNA through the switch;
a bias control circuit configured to control a supply of a bias current driving the first PA; and
a voltage protection circuit electrically connected to the bias control circuit,
wherein the voltage protection circuit is configured to:
compare a first voltage provided by a battery with a first reference voltage and a second reference voltage respectively, the first reference voltage being higher than the second reference voltage, and
control the bias control circuit to supply the first PA with the bias current based on a result of comparing the first voltage with the first reference voltage and the second reference voltage.