Samsung Electro-mechanics Co., Ltd.

Silicon Display Technology

Ki Joong Kim

Youn Suk Kim

Jun Goo Won

Young Jean Song

Shinichi Iizuka

Myeong Woo Han

Joong Jin Nam

Ju Young Park

Jae Hyouck Choi

Sang Hee Kim

Ji Ho Hur

Sang Wook Park

Sung Hwan Park

Chul Hwan Yoon

Da Hye Park

Bong Yeob Hong

Hyo Gun Bae

Yoshiyuki Tonami

Hyo Keun Bae

Bo Hyun Hwang

Nam Heung Kim

Dae Seok Jang

Yong Ju Ham

Woo Jin Byun

Dae Hee No

Young Hoon Kim

Hyun Jun Kim

Tae Joon Park

Sang Hoon Ha

Soon Ho Choi

Sung Jae Yoon

Youn Duck Nam

Chul Hyo Yoon

Iizuka Shinichi

Hyo Kun Bae

Youn Lea Kim

Jin Hyeong Yoo

Young-Jean Song

Seong Geon Kim

Shinichi Ilzuka

Dae Hun Hur

Dae Heon Hur

Yong Kuk Kim

A bias circuit of an amplifying device including amplifying circuits and a bypass circuit responding to a first control signal, includes a first bias circuit, a second bias circuit, and a compensating circuit. The first bias circuit is configured to supply a first base bias voltage to a first amplifying circuit of the amplifying circuits in response to a second control signal. The second bias circuit is configured to supply a second base bias voltage to a second amplifying circuit of the amplifying circuits in response to a third control signal. The compensating circuit is connected to either one or both of the first bias circuit and the second bias circuit, and configured to vary an impedance in response to a fourth control signal, and compensate for either one or both of the first base bias voltage and the second base bias voltage based on the varied impedance.

Bias circuit and amplifying device with bias compensation function

A power amplifier circuit includes a bias circuit and an amplifier circuit. The bias circuit includes a first bias circuit to receive a reference voltage and an operation voltage and generate a first bias signal, a bias supply circuit to transmit the base bias signal to a base of a power amplifier, based on the first bias signal input from the first bias circuit, a switching control circuit to transmit a switching signal after a preset delay time based on a driving start signal, and a switching circuit connected between an output node of the first bias circuit and a ground, to operate in an ON state after the delay time in response to the switching signal to form a current path between the output node of the first bias circuit and the ground.

Bias circuit and power amplifier circuit

A bias circuit providing different bias voltages depending on a power mode through a simple circuit, and a power amplifier having the same are provided. The bias circuit and the power amplifier include a bias setting unit configured to vary a voltage level of a control signal controlling a bias voltage according to an operation of a first transistor being switched-off in a high power mode and switched-on in a low power mode. A bias supplying unit includes a bias supplying transistor switched based on the control signal, to supply the bias voltage having a voltage level according to a switching operation of the bias supplying transistor.

Bias circuit and power amplifier having the same

The present invention relates to a capacitive fingerprint sensor, and the capacitive fingerprint sensor includes: a fingerprint sensor electrode for sensing a fingerprint of a human body; a first transistor of which a current or an output voltage is changed according to a voltage change of capacitive coupling formed by fingerprint capacitance formed when a fingerprint contacts the fingerprint sensor electrode and coupling capacitance formed for capacitive coupling; a fifth transistor that resets a gate electrode of the first transistor and applies capacitive coupling to the gate electrode of the first transistor through a coupling pulse; a second transistor of which a current or an output voltage is changed due to a difference in the current flowing through the first transistor and a gate voltage is maintained by a capacitor; a third transistor that resets a gate electrode of the second transistor; and a fourth transistor that controls a current flowing through the second transistor or an output voltage of the second transistor and transmits the controlled current or output voltage to a readout circuit.

Capacitive fingerprint sensor

Provided is a fingerprint recognition sensor capable of sensing a fingerprint using optical and capacitive methods, the sensor including: a capacitive fingerprint sensing unit that includes a transistor (T) in which a flowing current is changed depending on an output voltage of a fingerprint sensing electrode capable of sensing the humans fingerprint; and an optical fingerprint sensing unit which changes the flowing current in the transistor (T) due to a difference in reverse current of a photodiode generated by light and shade depending on existence or non-existence of the fingerprint.

Fingerprint recognition sensor capable of sensing fingerprint using optical and capacitive method

The present invention relates to an optical fingerprint sensor which can comprise: a backlight unit for irradiating light; an uneven surface layer onto which the light from the backlight unit is irradiated; and a photosensor unit arranged between the backlight unit and the uneven surface layer so as to detect the light irradiated from the backlight unit and reflected from a user's fingerprint coming into contact with the uneven surface layer.

Optical fingerprint sensor

A voltage detecting apparatus includes a signal extracting circuit configured to extract a coupled signal from a signal output by a power amplifier configured to amplify a signal output by a radio frequency (RF) circuit, and a voltage detecting circuit configured to detect a detection voltage from the coupled signal and provide the detection voltage to the RF circuit. The voltage detecting circuit configured to vary the detection voltage in response to an input control signal.

Voltage detecting circuit and power amplifier

A power amplifier may include an amplifying unit configured to amplify an input signal, an impedance varying unit connected between the amplifying unit and an output port that is for outputting an amplified signal of the input signal, and a controller configured to output a first control signal based on a level of power of the amplified input signal of the amplifying unit to control a varying of impedance of the impedance varying unit.

Power amplifier and method

Provided is a transparent fingerprint recognizing sensor array, including: a pixel driving circuit formed on a substrate; an antistatic wiring disposed in an upper part of the pixel driving circuit; and a pixel electrode connected to the pixel driving circuit, wherein the pixel electrode is made of a transparent material or has an open formed in a center part thereof.

Transparent fingerprint recognizing sensor array

Provided is a thin film transistor liquid crystal display (TFT LCD) in which a capacitive touch sensor is embedded, the TFT LCD comprising: a touch sensor source follower TFT formed on a substrate; a first electrode connected to a gate electrode of the touch sensor source follower TFT; a touch sensor reset TFT including the first electrode; an insulator film formed on the first electrode; a second electrode formed on the insulator film; and a display switching TFT including the second electrode, wherein the second electrode is connected to a drain electrode of the display switching TFT; the touch sensor reset TFT and the gate electrode of the touch sensor source follower TFT share the first electrode; and the first electrode is connected to the gate electrode of the touch sensor source follower TFT.

Thin film transistor liquid crystal display having capacitive touch sensor embedded therein

The present invention relates to a power detection circuit and an RF signal amplification circuit having the same. According to an embodiment of the present invention, a power detection circuit including a coupling unit adjacent to an RF matching inductor to extract induced power; a rectification unit for rectifying the signal output from the coupling unit to output the rectified signal; a slope adjustment unit connected between an output terminal of the rectification unit and a ground and adjusting a voltage slope for power detection by changing the output signal of the output terminal of the rectification unit according to changes in internal impedance; and a smoothing unit for receiving the output signal of the output terminal of the rectification unit to smooth the received signal into a DC voltage for power detection using the voltage slope is provided. Further, an RF signal amplification circuit having the same is provided.

Power detection circuit and RF signal amplification circuit having the same

There are provided an antenna and a front end module having an air cavity formed therein and shortening a connection distance with a signal processing module to improve radiation characteristics and facilitate a manufacturing process thereof, the antenna including a substrate having a preset mounting surface, an antenna pattern part formed on the mounting surface of the substrate and transmitting and receiving a signal within a preset frequency band, and a solder ball group having a plurality of solder balls formed on the mounting surface of the substrate to fix the substrate to an external circuit board and disposed at preset intervals around the antenna pattern part to form an air cavity.

Antenna and front end module

There are provided a bias circuit and an amplifier controlling a bias voltage, the bias circuit and the amplifier including a control voltage generating unit generating a control voltage using a reference voltage, a bias voltage generating unit generating a bias voltage according to the control voltage, and a voltage drop unit dropping the bias voltage from the bias voltage generating unit to a base voltage so as to provide the base voltage to an amplifying unit, wherein the control voltage generating unit controls the control voltage according to an amplitude of a high-frequency signal input to the amplifying unit.

Bias circuit and amplifier controlling bias voltage

There are provided a series inductor array implemented as a single winding capable of decreasing a layout area for providing a plurality of inductors, and a filter including the same, the series inductor array including a winding structure having both ends, and one or more terminal parts electrically connected to a region between the both ends of the winding structure to form an external electrical connection, wherein the winding structure has a structure in which a plurality of inductors having inductance formed in regions of the winding structure disposed between the both ends thereof and the terminal parts or between the terminal parts are connected in series.

Series inductor array implemented as a single winding and filter including the same

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Jeollabuk-do, South Korea

Ki Joong Kim