Samsung Electronics Co., Ltd.

Ho-Soo Seo

Dong-In Ha

Konstantin Stanialavovich Krylov

Alexandre Goudelev

Jae-joon Choi

Taig-Jong Yoo

Jung-Ho Park

Wan-Jin Choi

Seong-Joong Kim

Hyung-Suk Kim

Jung-Hyeong Lee

Byung-Hun Hwang

Mu-Sul Kim

Seonk-Kyeng Kim

Won-Chan Kim

An apparatus and method for preventing erroneous detection of a jack is provided. The apparatus includes a detection terminal configured to detect whether a jack plug of an earphone is inserted into the jack, a comparator configured to compare a voltage input from the detection terminal with a predetermined reference voltage and provide a comparison result signal to a baseband module, a resistor with a certain resistance value, being interposed between the detection terminal and the comparator to keep a voltage of a high signal not to be lowered than the predetermined reference voltage when the jack is conducted due to conductive particles flowed into the jack.

Apparatus and method for preventing erroneous detection of jack

The present invention relates to a power amplifying circuit of a mobile terminal and, more particularly, to a voltage gain control circuit in a mobile terminal which is capable of acquiring a variable voltage gain. The present invention includes a transceiver controller to produce a voltage gain control signal and transforming analog and digital signals; a first driving voltage controller for generating a reference voltage for a predetermined voltage gain according to the voltage gain control signal; a DC voltage transformer for transforming source voltage into a first driving voltage according to the reference voltage of the first driving voltage controller; a second driving voltage controller for generating a second driving voltage according to the voltage gain control signal; and a power amplifier for generating a predetermined voltage gain according to the first driving voltage supplied by the DC voltage transformer and the second driving voltage supplied by the second driving voltage controller.

Power amplifying circuit in mobile terminal

A power control apparatus of a complex terminal is disclosed that includes a DC/DC converter for outputting an auxiliary power supplied from an auxiliary battery after adjusting a level of voltage of the auxiliary power to a required input voltage level of the complex terminal; a second voltage sensor for measuring voltage of a main power outputted from a main battery, and controlling the auxiliary power of the auxiliary battery to be inputted to the DC/DC converter before the measured voltage of the main power becomes lower than a predetermined voltage; and a first voltage sensor for interrupting supply of the main power from the main battery to the complex terminal and controlling the auxiliary power outputted from the DC/DC converter to be supplied to the complex terminal, when the measured voltage of the main power becomes lower than the predetermined voltage.

Power control apparatus of a complex terminal

A portable terminal having a tuner for changing an antenna radiation pattern is disclosed. In the portable terminal, a main body has a main body PCB and a main body ground defined in the main body PCB. A folder is rotatably connected to the main body by a hinge device. An antenna device is provided at an upper end of the main body. The tuner is formed at a predetermined position of the main body in the vicinity of the antenna device, for changing a current distribution of the main body and thus changing an antenna radiation pattern of the portable terminal.

Portable terminal having tuner for changing radiation pattern

The present invention relates to a device and method for improving a radiation pattern of a built-in antenna in a folder-typed mobile wireless terminal that has a main body having the RF board installed with a built-in antenna, a sub-body to be opened and closed at an angle from the main body, and a hinge module configured to open and close the sub-body. The device includes a conductive ground means installed in the sub-body at a portion adjacent to the built-in antenna, for minimizing a radiation pattern difference of the built-in antenna between the opening and closing of the sub-body, thereby increasing reliability of the terminal.

Device and method for improving a radiation pattern of a mobile wireless terminal with a built-in antenna

Disclosed is an apparatus for improving an intermodulation distortion characteristic by controlling a gain of an attenuator in a CDMA mobile terminal. The apparatus includes a converter for passing input signal components except an IF signal component, amplifying the passed input signal to a specific level, converting the amplified signal to a DC signal, comparing the DC signal with first and second thresholds, and generating a control signal for controlling an operating point of the attenuator by synthesizing the compared result signals.

Apparatus for improving intermodulation distortion characteristics in a CDMA mobile terminal

A regulator system and method for controlling the level of an output voltage. The regulator system comprises a regulator, enabled in response to an enable signal, for converting a level of an input signal into a predetermined value and providing a first output signal, a smoother for smoothing the first output signal from the regulator and providing the smoothed signal as a second output signal, and an enable signal generator for generating an initial version of the enable signal to control an enable period of the regulator so that the second output signal has a target level and adjusting an enable active period of the initial version of the enable signal to generate a new version of the enable signal when a level of the second output signal associated with the initial version of the enable signal is different from the target level.

Regulator system for controlling output voltage and method of controlling the same

A dual band antenna for a radio terminal consists of a retractable whip antenna and a helical antenna with irregular pitches, wherein the whip antenna is independent of the helical antenna. The helical antenna includes first and second helical portions having first and second pitches, respectively and the first and second helical portions are operable at different frequency bands independently. The whip antenna includes a conductive core line, a conductive substance covering a first portion of the conductive core line to serve as a choke and an isolation element extending from an upper end of the conductive core line, for filling a gap between the conductive core line and the conductive substance. Here, only the first portion of the conductive core line is operable at a first frequency band and the entire conductive core line is operable at a second frequency. A fixing element fixes the helical antenna and the whip antenna to the radio terminal. The fixing element has an upper end connected to a lower end of the helical antenna and a through hold via which the whip antenna is inserted into an interior of the radio terminal.

Dual band antenna for radio terminal

An antenna apparatus for a mobile terminal is provided having a hula hoop antenna secured to a housing of the mobile terminal; a conductive line coupling the hula hoop antenna to a transceiver of the mobile terminal; a conductive fixing member having a through hole and contacting a portion of the hula hoop antenna; a cylindrical fixing member inserted into the through hole of the conductive fixing member; and a rod antenna extendable and retractable from and into the housing. The rod antenna is movable along a central axis of the cylindrical fixing member. The hula hoop antenna has a first end connected to a variable capacitor on a printed circuit board of the mobile terminal and a second end connected to a ground plate of the printed circuit board.

Antenna apparatus for mobile terminal

A dual band antenna with a simple and compact structure includes an inductor, first and second rod-like radiating elements connected to opposite ends of the inductor, with dielectric material surrounding both the inductor and the joining portions of the first and second radiating elements on the respective ends of the inductor. A conductive housing surrounds the dielectric and supports the inductor and the joining portions of the first and second radiating elements. The housing and dielectric create a capacitance, so that an LC resonant circuit is formed in conjunction with the inductor. The LC circuit is designed such that only one radiating element radiates at the higher band of the dual operating band, whereas both radiating elements radiate at the lower band.

Dual band antenna

A dual band antenna for mobile communications includes a rod-shaped radiating element having a first portion of a predetermined length connected to a coaxial feed line, and a second portion of a specified length integrally extended from the first portion. The coaxial feed line connects to a ground plate, and a first capacitive load connects to the first portion of the radiating element. A choke surrounds the second portion of the radiating element, and has a shorting end connected to a distal end of the second portion and an open end at a proximal end of the second portion. A second capacitive load connects to the shorting end of the choke. In a higher operating band of the dual band, the input impedance of the choke is high, such that only the first (lower) portion of the radiating element radiates. At a lower operating band of the dual band, the choke's input impedance is lower to allow for radiation from the entire length of the antenna.

Growing community of inventors

Suwon-si, South Korea

Ho-Soo Seo