Korea Advanced Institute of Science and Technology

Samsung Electronics Co., Ltd.

Samsung Display Co., Ltd.

Westinghouse Electric Corporation

Skhynix Inc.

Gyu-Hyeong Cho

Sang-Kyung Kim

Young-Suk Son

Se-Ho Park

Sung-Ku Yeo

Jun-han Choi

Sung-Soo Park

Hyun-Sik Kim

Young-Hun Sung

Sang-Wook Han

Hee-Seok Han

Se-Ki Kim

Jun-hyeok Yang

Chang-byung Park

Young-Min Lee

Laszlo Gyugyi

Yongjin Lee

Dae-Yong Kim

Sangho Kim

Theodore M Heinrich

Oh-Jo Kwon

Ki-Duk Kim

Ji-Hun Lee

Nam-Sung Jung

Jun-Suk Bang

Sang Joon Kim

Joo-Hyung Lee

Chang-jung Kim

Young Shin Kim

Cheheung Kim

Hyunseok Kim

Yong-Joon Jeon

Young Ju Kim

Hyeokki Hong

Yu-Su Kim

Seungchul Jung

Jong Pal Kim

Jae-chul Park

Hoon-Tae Kim

Sung-Woo Lee

Choong-Sun Shin

Jeong-Seok Lee

Yoon-kyung Choi

Hyunwook Kang

Kyu-sub Kwak

Byung-Hoon Kang

Ohjo Kwon

June-Hyeon Ahn

Won-Tae Choi

Hyoung-Rae Kim

Sang Kyung Kim

Je-in Yu

Hee-Sun Ahn

Bo-Yeon Kim

Ji-Woong Kim

Jeongwook Koh

Chang Seok Chae

Sang Jin Lim

Gun-Ho Lee

Se Un Shin

Hyung-Min Lee

Chang-Byung Park

Gun-ho Lee

Gyeong-Gu Kang

Jin-Yong Jeon

Ji-Su Choi

Minyong Jung

Min-Chul Lee

Heemun Bang

Kyoung-sik Seol

Sungwon Choi

Se-Un Shin

Youngsub Yuk

Yeun-hee Huh

Sun-Soon Park

Kye-Seok Yoon

Yu Jin Yang

Hui-dong Gwon

Young-sub Yuk

Jin-yong Jeon

Seok Tae Kho

Chang-Jung Kim

Young-Hoon Sung

Jae-Chul Park

Jun-Hyeok Yamg

A reference voltage generating circuit includes a bandgap reference (BGR) circuit configured to output an active reference voltage at a first node according to a sample signal; a first charging circuit configured to charge a first capacitor using the active reference voltage according to the sample signal; a second charging circuit configured to charge a second capacitor using the active reference voltage according to the sample signal; and a comparing circuit configured to compare a voltage difference between a charge voltage of the first capacitor and a charge voltage of the second capacitor with a threshold value, wherein the sample signal is a pulse signal generated using an output of the comparing circuit and the charge voltage of the first capacitor is provided as a low power reference voltage in a low power operation mode.

Low power reference voltage generating circuit

A single-inductor multiple-output (SIMO) converter includes a converter configured to provide respective voltages of a plurality of channels with a single inductor and a control logic configured to control switches of the converter based on clocks corresponding to the plurality of channels, wherein the control logic is configured to compare an output voltage of a selected channel of the plurality of channels that corresponds to a control target to a reference voltage of the selected channel based on a clock of the selected channel and operate in one of a first mode that adaptively adjusts a number of times that a pulse triggering a power transfer to the channel is generated, and a second mode that blocks a generation of the pulse.

Single-inductor multiple-output (SIMO) converter and control method of SIMO converter

An amplifier includes: a first input transistor connected to a first input, a first output, and a power source or a ground, a second input transistor connected to a second input, a second output, and the power source or the ground; a first replica transistor connected to the first input, a detection node, and the power source or the ground; a second replica transistor connected to the second input, the detection node, and the power source or the ground; and a bias transistor connected to a bias voltage, the detection node, and the power source or the ground.

Amplifier

A digital-to-analog converter having a structure that converter may decrease an effect of a mismatch between elements and decrease a quantity of the elements. The digital-to-analog converter includes a multiplexer configured to output a first voltage or a second voltage corresponding to an input bit as an input voltage and a recursive switched circuit configured to alternately receive the input voltage and a reference voltage and to output an average value of the input voltage and the reference voltage as an output voltage.

Digital-to-analog converter and driving circuit of display device having the same

A low dropout voltage (LDO) regulator including: a coarse loop circuit configured to receive an input voltage, generate a coarse code and adjust a coarse current according to the coarse code; a digital controller configured to receive the coarse code and generate a fine loop control signal according to the coarse code; and a fine loop circuit configured to receive the input voltage and the fine loop control signal and adjust a fine current according to the input voltage and the fine loop control signal, wherein the coarse current and the fine current adjust a level of an output voltage.

Low dropout voltage (LDO) regulator including a dual loop circuit and an application processor and a user device including the same

An electronic circuit includes an inductive element, a capacitive element, and switch elements. A first end of the inductive element is connected to an input voltage. A first end of a first switch element is connected to the first end of the inductive element. The capacitive element is connected between a second end of the first switch element and a second end of the inductive element. A second switch element is connected between the second end of the first switch element and a reference voltage. A third switch element is connected between the second end of the inductive element and the reference voltage. A fourth switch element is connected between the second end of the inductive element and a first output voltage. A fifth switch element is connected between the second end of the inductive element and a second output voltage.

Electronic circuit performing buck-boost conversion using single inductive element

A coordinate measurement device and method for hover sensing are disclosed. According to the present invention, the coordinate measurement device comprises: a channel electrode unit including a plurality of electrodes, wherein a capacitance of at least one of the plurality of electrodes variably changes by the approach of a contact object; a driving unit for applying a positive voltage to a first electrode group among the plurality of electrodes and applying a negative voltage to a second electrode group among the plurality of electrodes; a reception unit for receiving reception signals from a plurality of electrodes in the first electrode group and a plurality of electrodes in the second electrode group, respectively; and a processor for determining the position of the contact object on the basis of the received signals. Therefore, the coordinate measurement device can detect an accurate position of the contact object approaching the coordinate measurement device, through a conventional sensing element and circuit process.

Coordinate measurement device and method for hover sensing

A coordinate indicating apparatus includes a channel electrode which includes a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction perpendicular to the first direction, and which has capacitance between the first plurality of electrodes and the second plurality of electrodes, the capacitance being changed by an approaching contact object; a driver configured to apply driving signals to the first plurality of electrodes simultaneously; a receiver configured to receive response signals from the second plurality of electrodes; and a controller configured to determine a location of the contact object based on the driving signals transmitted to the first plurality of electrodes and the response signals received from the second plurality of electrodes, wherein the driver is configured to simultaneously apply, to the first plurality of electrodes, continuous driving signals according to a matrix corresponding to a Hadamard matrix, and wherein the driving signals exclude a time section.

Coordinate indicating apparatus and method for driving thereof

A wireless power receiver for wirelessly receiving power from a wireless power supplier includes a power receiver for receiving wireless power from the wireless power supplier and storing the wireless power for a first time period, a rectifier connected to the power receiver for rectifying the wireless power, a power adjuster connected to the rectifier and an output end, for adjusting a magnitude of the wireless power by enabling the power receiver to store the wireless power for the first time period and delivering the wireless power to the output end for a second time period, and a controller for determining the first and second time periods.

Wireless power receiver for adjusting magnitude of wireless power

A wireless power receiver for wirelessly receiving a supply of power from a wireless power supplier is disclosed. The wireless power receiver includes a power reception unit for wirelessly receiving wireless power from the wireless power supplier; a rectifier for rectifying the wireless power into power including a DC waveform; a power adjustor for configuring a closed loop with the power reception unit for a first period and transferring the wireless power to the rectifier for a second period to adjust a size of the wireless power; and a controller for determining the first period and the second period, wherein the power adjustor is electrically connected to the power reception unit and the rectifier.

Wireless power receiver for controlling wireless power by using switch

A class-D amplifier includes an error amplification circuit, a duty signal generator, a level selection circuit, a driver and control block and an output stage. The class-D amplifier divides peal levels of an error signal into multi-level and changes a scheme for modulating the error signal when the error signal crosses each level boundary of the multi-level thereby to have an effect such as the error signal is folded. Therefore, the class-D amplifier drives output nodes with multi-level and thus the class-D amplifier may increasing efficiency while reducing EMI.

Class-D amplifier, audio processing apparatus and method of driving class-D amplifier

A device for sensing a touch by measuring a variation in capacitance according to a contact of an object, and measuring a contact position of the object is provided. The device includes a touch screen panel comprising grid electrodes forming a plurality of electrode patterns, the grid electrodes serving as Tx antennas or Rx antennas, a Tx circuit unit connected with the grid electrode to apply an electric signal to the touch screen panel unit, an Rx circuit unit connected with the grid electrodes to sense variations in the capacitance in the plurality of electrode patterns, and a controller configured to control the touch screen panel unit, the Tx circuit unit, and the Rx circuit unit. The Rx circuit unit includes a first operational amplifier, a first feedback capacitor, and a second feedback capacitor. The first feedback capacitor and the second feedback capacitor are connected with the first operational amplifier. Both terminals of the first feedback capacitor and the first operational amplifier are connected through a first switching unit. The first switching unit includes a 1-1 switch and a 1-2 switch, which are controlled to be short-circuited at a first phase of the electric signal. Both terminals of the second feedback capacitor and the first operational amplifier are connected through a second switching unit. The second switching unit includes a 2-1 switch and a 2-2 switch, which are controlled to be short-circuited at a second phase of the electric signal. The controller is further configured to short-circuit the first switching unit and the second switching unit, at different times, to store charges in each of the first feedback capacitor and the second feedback capacitor.

Touch sensing device

Disclosed are a method and apparatus for controlling a booster circuit such that maximum power is extracted from a power supply while power consumption for monitoring power generated by the power supply is reduced, and an apparatus for extracting maximum power by using the method and apparatus for controlling a booster circuit.

Method and apparatus for controlling booster circuit and apparatus for extracting maximum power by using the same

A touch sensing device for measuring a contact position of an object by measuring a change in capacitance caused by contact of an object is provided. The touch sensing device includes a touch screen panel on which channel electrodes functioning as a transmission antenna or a reception antenna are disposed to form a plurality of electrode patterns, a transmission circuit connected to the channel electrodes to apply an electrical signal to the touch screen panel, a reception circuit connected to the channel electrodes to sense a varying capacitance from the plurality of electrode patterns, and a controller configured to control the touch screen panel, the transmission circuit and the reception circuit.

Growing community of inventors

Daejeon, South Korea

Gyu-Hyeong Cho