Samsung Electronics Co., Ltd.

Hankyu Lee

Sang Joon Kim

Seungchul Jung

Junyeub Suh

Chisung Bae

Hyungwoo Lee

Jaechun Lee

Seong Joong Kim

Yeunhee Huh

An implant system includes an implant device configured to generate a stimulation signal for a user using a power manager according to an operation mode based on biometric information of the user, and a wake-up device configured to switch the operation mode based on either one or both of an energy supply received through an external energy source different from the power manager and a result of counting a timer.

Implant system including wake-up device and operating method of implant system including wake-up device

A converter and a circuit device including the converter are disclosed. The converter includes an inductor including a first end and a second end, and a switching circuit connected to the inductor. The switching circuit includes a first switch to control a connection between the first end and a battery connected to the converter, a second switch to control a connection between the second end and a current output end configured to output a current generated through the inductor from the battery, a third switch to control a connection between the second end and a voltage output end configured to output a voltage generated from the battery, and a fourth switch to control a connection between the second end and a voltage input end configured to receive a voltage to charge the battery.

Converter device and method

A current stimulator includes a first current generation circuit configured to generate a first current, injectable into a cranial nerve cell, through a current mirroring based on a plurality of transistor pairs; and a second current generation circuit, driven by a clock, configured to generate a second current smaller than the first current by controlling a charge rate based on a voltage difference between terminals of a capacitor. A first output impedance of the first current generation circuit and a second output impedance of the second current generation circuit have a magnitude greater than or equal to a predetermined ratio to a load impedance corresponding to the cranial nerve cell.

Current stimulator for recording cranial nerve signals and operation method of current stimulator

A wireless power receiver and a wireless power reception method are disclosed. The wireless power receiver includes a charging element, a receiving coil configured to wirelessly receive power from a wireless power transmitter, a rectifier configured to convert an alternating current (AC) voltage generated from the receiving coil to a direct current (DC) voltage, and to output the DC voltage, a voltage converter configured to generate a charging current to charge the charging element, based on the DC voltage output from the rectifier, a current measurer configured to measure the charging current transferred to the charging element, and a controller configured to control a level of the charging current generated from the voltage converter based on a result of the measuring.

Device and method for receiving power wirelessly

A wireless power relay apparatus includes: a first antenna configured to wirelessly receive an alternating current (AC) power signal of a first frequency from a wireless power transmission apparatus; a rectifier configured to convert the received AC power signal into a direct current (DC) power; a storage device configured to store electric energy of the DC power output from the rectifier; a power oscillator configured to generate an AC power signal of a second frequency based on an output current of the rectifier and electric energy of a DC voltage stored in the storage device; and a second antenna configured to transmit the AC power signal of the second frequency to a wireless power reception apparatus.

Apparatus and method with wireless power relay

A wireless power receiver includes a rectifier configured to convert a radio frequency (RF) voltage signal generated based on an RF input to a direct current (DC) voltage, and a boost converter configured to generate a voltage for battery charging using the RF voltage signal as a switching signal.

Wireless power receiver

A relaxation oscillator and a method of controlling the relaxation oscillator are disclosed. The relaxation oscillator includes a reference voltage generating circuit configured to generate a reference voltage based on a transistor-based resistor, a variable voltage generating circuit configured to generate a variable voltage based on the reference voltage and a control switch, a threshold voltage generating circuit configured to generate a threshold voltage using a switched-capacitor resistor circuit, and a switch control circuit configured to output a control signal to control the control switch based on the variable voltage and the threshold voltage.

Relaxation oscillator and method

A wireless power transmission system includes: a wireless power transmission apparatus including: a transmission coil configured to form mutual coupling with an auxiliary coil disposed outside of a living body; and a controller configured to control a supply of power by a power source to the transmission coil to wirelessly transmit the power from the transmission coil, using the auxiliary coil, to a wireless power reception apparatus disposed inside the living body through the mutual coupling, wherein a distance between the transmission coil and the auxiliary coil is adjustable.

Growing community of inventors

Suwon-si, South Korea

Hankyu Lee