Samsung Electro-Mechanics Co., Ltd.

Shinichi Iizuka

Youn Suk Kim

Ki Joong Kim

Jun Goo Won

Myeong Woo Han

Young Jean Song

Ju Young Park

Sang Hoon Ha

Jun Kyung Na

Sang Hee Kim

Jong Ok Ha

Jongok Ha

Hyejin Lee

Youngwong Jang

Jeong Hoon Kim

Jeonghoon Kim

Byeong Hak Jo

Hyo Keun Bae

Chang-Ho Lee

Jae Hyouck Choi

Wangmyong Woo

Kyu Hwan An

Joong Jin Nam

Jaejoon Chang

Ki Seok Yang

Young Wong Jang

Younsuk Kim

Kijoong Kim

Hyogun Bae

Chang Seok Lee

Sang Wook Park

Kwang Du Lee

Hyun Paek

Yu Sin Kim

Ho Kwon Yoon

Nam Heung Kim

Suk Chan Kang

Kyung Hee Hong

Chul Hwan Yoon

Hyo Kun Bae

Young-Jean Song

Nam Jin Oh

A power supply switch circuit includes a switch circuit including a first switch configured to switch a first power source voltage to a power supply terminal of a power amplifier, and a second switch configured to switch a second power source voltage to the power supply terminal; a switch controller configured to control the switch circuit; and a power supply circuit configured to supply a third power source voltage to the power supply terminal when a first voltage of the power supply terminal is lower than a predetermined second voltage.

Power supply switch circuit and operating method thereof

A power supply switch circuit includes: a first switch to switch supply of a first power supply voltage to a power supply terminal of a power amplifier; a control voltage generator to generate a first control voltage through a charge pump operation, and to control the charge pump operation by comparing the first power supply voltage to a first voltage, which is a voltage of the power supply terminal; and a switch controller to generate a switching driving signal to control the first switch using the first control voltage.

A power source switch circuit and an operation method thereof are provided. The power source switch circuit may include a switch circuit that includes a first switch configured switch a supply of a voltage from a first power supply circuit to a power supply terminal of a power amplifier, and a second switch configured to switch a supply of a voltage from a second power supply circuit to the power supply terminal of the power amplifier; and a switch controller configured to control the switch circuit to set the first switch and the second switch in a turned-on state during a first period when the first switch is turned off and the second switch is turned on.

A power supply switch circuit is disclosed. The power supply switch circuit includes a first switch configured to switch a supply of a first power supply voltage to a power supply terminal of a power amplifier; and a switch driving circuit including a first transistor configured to turn on the first switch, and a second transistor configured to turn off the first switch. The switch driving circuit may further include a first resistor that is positioned on a turn-on path formed between the first transistor and the first switch when the first transistor is turned on.

Power supply switch circuit and switch driver circuit

A power supply switch circuit includes a first transistor that switches supplying of a first power supply voltage to a power supply terminal of a power amplifier, a switch controller that controls the first transistor and to which a second power supply voltage is applied, and a voltage selector that selects a higher voltage among the first power supply voltage and the second power supply voltage. The selected higher voltage is applied to a body terminal of the first transistor or a gate terminal of the first transistor.

A bias timing control circuit includes a current source, a bias switch circuit, a duty cycle sensing circuit, and a switching control circuit. The bias switch circuit includes a first path switch, connected between an output node of the current source and a bias amplifying circuit, and a second path switch, connected between the output node of the current source and a temperature compensation circuit. The duty cycle sensing circuit is configured to generate a timing control signal based on a duty cycle of a transmission enable signal. The switching control circuit is configured to control a first turn-on time of the first path switch during an initial startup period, and a second turn-on time of the second path switch during a normal driving period subsequent to the initial startup period to adjust a warm-up time of a power amplifying circuit based on the timing control signal.

Amplifying device with bias timing control circuit based on duty cycle

An amplifying apparatus is provided. The amplifying apparatus comprises an amplifying circuit comprising a power amplifier and a bias circuit, the bias circuit is configured to detect an ambient temperature of the power amplifier to output a temperature voltage and regulate an internal current based on an input control signal to supply a bias current obtained by the regulation to the power amplifier; and a temperature control circuit that generates the control signal based on the temperature voltage during initial driving from a transmission mode starting point in time to an input point in time at which an input signal is input and outputting the control signal to the amplifying circuit.

Amplifying apparatus with improved linearity

A power amplifier device includes a bias circuit to generate a startup current, which is based on an internal voltage and a startup voltage, during a startup time prior to a steady driving time point, and to generate a bias current, which is based on the internal voltage, after the steady driving time point, and a startup circuit to supply the bias circuit with the startup voltage during the startup time.

Power amplifier device with improved response speed

A voltage generation circuit having a temperature compensation function includes a first voltage generation circuit, a second voltage generation circuit, an output voltage control circuit, and a voltage selection circuit. The first voltage generation circuit is configured to generate a first voltage having a zero temperature coefficient, determined in response to a first control signal. The second voltage generation circuit is configured to generate a second voltage having a positive temperature coefficient, determined in response to a second control signal. The output voltage control circuit is configured to control an output of one of the first voltage and the second voltage in response to an operating mode. The voltage selection circuit is configured to select the first voltage or the second voltage in response to the output voltage control circuit.

Voltage generation circuit having a temperature compensation function

A power amplifier apparatus includes: an amplifier configured to amplify an input signal; a sensing circuit connected to the amplifier and configured to sense a bias of the amplifier; and a biasing circuit connected to the sensing circuit and configured to provide a biasing current to the amplifier, wherein the sensing circuit is configured to change the biasing current based on the bias of the amplifier.

Power amplifier and method for limiting current in power amplifier

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

There are provided a power amplifying circuit and a front end module including the same. The power amplifying circuit includes a signal amplifying unit amplifying and outputting a plurality of wireless signals having different frequency bands, and a diplexer circuit transferring at least one of the plurality of wireless signals output from the signal amplifying unit to an antenna, wherein the signal amplifying unit and the diplexer circuit include impedance matching circuits having different impedance matching ranges, respectively, and the impedance matching range of the diplexer circuit is continuous with that of the signal amplifying unit.

Power amplifying circuit and front end module including the same

There is provided a radio frequency input circuit including a first direct current blocking unit provided between an input terminal and an input circuit unit and blocking a direct current voltage introduced through the input terminal, a first ESD protection circuit unit provided in parallel with the first direct current blocking unit and forming a bypass path according to an ESD voltage introduced through the input terminal, and a ground circuit unit provided between a first connection node between the first direct current blocking unit and the input circuit unit, and a ground, and forming a ground path according to the ESD voltage.

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Gyunggi-do, South Korea

Shinichi Iizuka