Samsung Electro-mechanics Co., Ltd.

Soo Woong Lee

Joo Yul Ko

Woo Young Choi

Je Hyuk Ryu

Jong Woo Lee

Joo Hyoung Lee

Byung Joo Hong

Yong Woon Ji

Sung Tae Kim

Yoo Hwan Kim

Yo Sub Moon

Ki Sung Kwon

Sung Cheol Shin

Jin Taek Lee

Chang Hyun Kim

Jung Chul Gong

Ho Kwon Yoon

Jung Eui Park

Gyu Suck Kim

Kyung Uk Kim

Tae Ho Lim

Sang Gyu Park

Seung Chul Pyo

Dong Ok Han

Ju Yong Kim

Gwang Pyo Park

A capacitor circuit includes a capacitor array including first to n-th capacitors connected to each other in parallel; a select switch circuit including first to n-th select switches connected to the first to n-th capacitors in series, respectively; and a short switch circuit including first to n-th short switches connected to the first to n-th capacitors in parallel, respectively, and operating complementarily to the first to n-th select switches, respectively, wherein n is an integer of 2 or greater.

Capacitor circuit and oscillator

A sensing device with a fingerprint sensor is provided. The sensing device includes a touch input pattern included in the fingerprint sensor, an oscillation circuit connected to the touch input pattern and configured to change a capacitance of the oscillation circuit when a touch occurrence is sensed by the touch input pattern and generate an oscillation signal based on the change in the capacitance, and an operation detection circuit configured to detect a touch occurrence based on a frequency included in the oscillation signal input from the oscillation circuit and generate a detection signal.

Sensing device with fingerprint sensor

A moving object sensing control circuit includes: a control circuit configured to determine, based on a mode signal, whether to operate in a sensing mode or a power saving mode, and control, in the power saving mode, a sensing operation in a sensing stage and a standby operation in a standby stage; an LC oscillation circuit configured to generate an oscillation signal based on an impedance value corresponding to relocation of a moving object, by performing the sensing operation or the standby operation in response to control of the control circuit; and a sensing circuit configured to obtain a period count value of the sensing oscillation signal using a reference oscillation signal and a main oscillation signal, and output an output signal having movement information of the moving object based on the period count value, by performing the sensing operation in response to the control of the control circuit.

Moving object sensing control apparatus and method with power saving

A touch sensing device applied to an electronic device including a side portion having a cover that is nonconductive, and a frame that is conductive, includes: a first touch sensing portion including a first sensing electrode and a first sensing inductor disposed inside the cover and electrically connected to each other, wherein, in response to a touch applied through the cover by a human body, a capacitance is varied by the first touch sensing portion according to parasitic capacitance generated between the first sensing electrode and the human body according to the touch applied through the cover; and a reference sensing portion including a reference coil disposed inside the side portion and configured to provide reference inductance of the reference coil that is constant, regardless of a touch applied through the frame.

Touch sensing device and electronic apparatus having malfunction prevention function

A time domain temperature sensor circuit includes a voltage generating circuit configured to generate and equalize a first voltage of a first node and a second voltage of a second node, a current generating circuit comprising a first semiconductor device connected between the first node and a ground, and configured to generate a first current, and a variable resistor circuit and a second semiconductor device connected in series between the second node and the ground, and configured to generate a second current, the variable resistor circuit being configured to vary a temperature gradient of the second current based on resistance variations by the variable resistor circuit, and a current mirror circuit configured to generate a third current by performing current mirroring of the second current and transmit the third current to an output terminal.

Time domain temperature sensor circuit with enhanced resolution

A switching operation sensing apparatus includes an input operation unit including a first detector integrally formed with a housing; a current variable oscillation circuit generating an oscillation signal having a frequency that varies based on a change in a capacitance from a human body touch on the operating unit, or a change in an inductance from a non-human body touch on the operating unit, and regulate an operating current in response to a control signal; an input operation detection circuit identifying the touch to be from the human body touch, and identifying the touch to be from the non-human body touch based on characteristics of the varied frequency, and generating detection signals having different levels based on the identification of the touch; and a control circuit that determines a sensing manner based on the detection signals and generating the control signal current based on the determined sensing manner.

Switching operation sensing apparatus with low-power dual-sensing structure

An actuator includes a magnet, a driving coil, a driver, and a position detector. The magnet is disposed on one surface of a lens barrel. The driving coil is disposed at a proximity of the magnet. The driver is configured to apply a driving signal to the driving coil to move the lens barrel along an optical axis. The position detector is configured to generate an oscillation signal of which a frequency is changed based on movement of the magnet and configured to compare oscillation signals generated in a first position and a second position of the lens barrel to detect a present position of the lens barrel.

Actuator of camera module

A current control device for a differential circuit is provided. The current control device includes a differential circuit that generates differential signals comprising a positive signal and a negative signal in opposite phases, an amplitude detection circuit detecting an amplitude of the differential signal and outputting first and second detection voltages, an error amplification circuit controlling the differential circuit on the basis of an error voltage between the first and second detection voltages, and a current control circuit controlling the amplitude detection circuit on the basis of any one of the first and second detection voltages.

Differential circuit with current control device

A camera module actuator includes, a magnet, a coil, a driver, and a position estimating processor. The coil is disposed to face the magnet. The driver is configured to move the magnet by applying a driving signal to the coil. The position estimating processor is configured to estimate a position of the magnet from an oscillating signal. A frequency of the oscillating signal varies according to a movement of the magnet.

Camera module actuator

An actuator of a camera module includes a magnet, a coil facing the magnet, a driver configured to apply a driving signal to the coil to move the magnet in a direction, and a position estimator. The position estimator is configured to convert an oscillation signal into a digital signal in a delta sigma modulation scheme, and estimate the position of the magnet from the digital signal. A frequency of the oscillation signal varies based on a position of the magnet.

A digital frequency measuring apparatus includes a frequency divider dividing an input frequency signal and providing a divided frequency signal; a period counter counting clock cycles in a period of the divided frequency signal using a clock signal and providing a period count value for each period; and a digital filter amplifying the period count value using an accumulated gain, converting an amplified period count value into a frequency, and providing a first digital output value. The digital filter determines the accumulated gain using a predetermined stage number and a predetermined decimator factor.

Digital frequency measuring apparatus

Provided is a driving circuit, system, and driving method for a gyro sensor. The gyro sensor driving circuit includes a charge/voltage conversion unit receiving a charge output from a vibration-type gyro sensor and converting the charge output into a voltage signal; a phase converting unit receiving a signal from the charge/voltage converting unit and converting a phase of the received signal; a pulse generating unit receiving an output signal of the phase converting unit and outputting the output signal as a pulse wave; a pulse converting unit converting the pulse wave output from the pulse generating unit into a pulse signal using a certain voltage level as reference so as to apply the pulse wave as a driving signal; and a control unit controlling the pulse converting unit to generate the pulse signal using the certain voltage level as reference.

Driving circuit, system, and driving method for gyro sensor

Disclosed herein are a constant voltage generating circuit and a constant voltage generating method. According to an embodiment of the present invention, the constant voltage generating circuit includes a voltage distribution unit performing voltage drop on a variable input power, a reference voltage and register bit generation unit outputting a band gap reference voltage and register bit, a comparison control unit comparing an input voltage dropped in the voltage distribution unit and the band gap reference voltage output from the reference voltage and register bit generation unit, and controlling the reference voltage and register bit generation unit or a constant voltage generation unit in accordance with the compared result, and a constant voltage generation unit receiving the variable input power by an operation of a switch corresponding to the register bit to thereby output a constant voltage, in accordance with the control of the comparison control unit.

Constant voltage generating circuit and constant voltage generating method for generating a constant voltage with respect to a variable power supply voltage without using a regulator

There is provided an apparatus for generating a motor driving control signal, the apparatus including: an oscillating unit generating an oscillating signal having a preset duty ratio; a selecting unit including a first switch switching a first path connected between the oscillating unit and an output terminal and a second switch complementarily operated with respect to the first switch and switching a second path connected to the first path in parallel; and a duty adjusting unit installed on the second path between the second switch and the output terminal, adjusting a duty ratio of the oscillating signal according to a rotation speed signal of a motor, and outputting the signal having the adjusted duty ratio as a driving control signal through the output terminal.

Apparatus for generating motor driving control signal

The phase margin compensation method according to an exemplary embodiment of the present invention includes: outputting reference voltage (Vout); outputting a first reference voltage (Vout) actually supplied to the target circuit; comparing the reference voltage (Vout) with the first reference voltage (Vout) by the comparator; counting any section of an output signal (pulse signal) from the comparator by a predetermined frequency by the duty cycle calculator; and controlling a phase margin of a frequency of output voltage supplied to the target circuit by controlling buffer current based on the duty cycle ratios and the output bit information fed back from the duty cycle calculator.

Growing community of inventors

Suwon-si, South Korea

Soo Woong Lee