公开(公告)号：US20240347080A1

公开(公告)日：2024-10-17

申请号：US18406726

申请日：2024-01-08

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hyunsuk Kang ,  Jeongsu Lee ,  Eunji An ,  Jungjune Park ,  Chiweon Yoon

IPC: G11C5/14

CPC classification number: G11C5/147

Abstract: A semiconductor device includes a first pull-up circuit connected between a first power node supplying a first power voltage and an output node through which a signal is output, and including a plurality of NMOS transistors; a second pull-up circuit connected in parallel to the first pull-up circuit between the first power node and the output node and including a plurality of PMOS transistors; and a control circuit outputting a first pull-up code to the first pull-up circuit and outputting the second pull-up code to the second pull-up circuit. In a first operating mode, the signal swings between a first low level lower than the first power voltage, and a first high level lower than ½ times the first power voltage, resistance of the first pull-up circuit is determined based on the first pull-up code, and resistance of the second pull-up circuit is determined based on the second pull-up code.

公开(公告)号：US11246494B2

公开(公告)日：2022-02-15

申请号：US16701740

申请日：2019-12-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Minhyun Cho ,  Taehyeon Kim ,  Seunghyun Lee ,  Jeongsu Lee ,  Daehyeong Lim ,  Daniel Joe ,  Seongmin Je

IPC: A61B5/00 ,  A61B5/0205 ,  A61B5/024

Abstract: Provided is an electronic device including a housing; a battery; a user interface; a photoplethysmogram (PPG) sensor including a light receiving module exposed through a portion of the housing, at least one light emitting diode (LED), and at least one photodiode; a processor operatively connected to the battery, the user interface, and the PPG sensor; and a memory. According to an embodiment, the memory stores instructions that, when executed, cause the processor to determine whether the PPG sensor is facing a surface of an external object having a reference color, determine whether to perform a test of the PPG sensor based on whether the PPG sensor is facing the surface, receive data from the PPG sensor by operating the PPG sensor in response to determining to perform the test, and perform calibration of the PPG sensor based on at least a portion of the received data. Other embodiments are possible.