Samsung Electronics Co., Ltd.

Seoul National University

Minhyeok Kang

Taekyoung Kwon

Sanghyo Lee

Kyeongdo Kim

Yonggwon Lee

Myeongcheol Kwak

Taeheon Park

The present disclosure provides systems and devices including reception circuits for communications between smart cards and card readers. In some embodiments, a reception circuit of a smart card includes a first circuit and a second circuit. The first circuit is configured to receive a wireless signal including a pause, and restore the wireless signal to a clock signal. The second circuit is configured to charge a voltage of a first node based on a first logic level of the clock signal, compare the voltage of the first node with a predefined reference voltage, and output, based on the comparison of the voltage of the first node, a synchronization signal indicating a rising starting time point of the pause of the wireless signal.

Reception circuit and smart card including the same

A smart card may include: an antenna configured to receive at least one radio signal; a load circuit that is connected to both ends of the antenna; a rectifier configured to rectify the at least one radio signal received through the antenna, and provide the rectified signal to an output terminal; and a power generator including a voltage regulator, a first diode, and a second diode, the voltage regulator configured to provide an internal voltage, the first diode and the second diode connected in series between the output terminal of the rectifier and a first node, and the first node is configured to receive the internal voltage during a first mode of the smart card, the first mode being a mode during which a load of the load circuit is modulated.

Smart card

An electronic apparatus is provided. The electronic apparatus includes an acceleration sensor, a gyro sensor, a geomagnetic sensor, and a processor configured to compare geomagnetic data of the geomagnetic sensor and gyro data of the gyro sensor and correct the gyro data, determine a first value based on a principal component analysis (PCA) of acceleration data of the acceleration sensor, and determine a second value based on a PCA of the gyro data, and estimate a moving direction of the electronic apparatus based on the first value and the second value.

Electronic apparatus of estimation of movement direction and method thereof

Growing community of inventors

Seoul, South Korea

Minhyeok Kang