Patent application number | Description | Published |
20100060363 | WIDEBAND LOW-NOISE AMPLIFIER - A wideband low-noise amplifier includes a source-degenerated common-source amplifier, a common-gate amplifier, and a matching frequency band determiner. The source-degenerated common-source amplifier is configured to amplify an input signal to output a first signal that is opposite in phase to the input signal. The common-gate amplifier is connected in parallel to the source-degenerated common-source amplifier to amplify the input signal to output a second signal that has the same phase as the input signal. The matching frequency band determiner is configured to isolate an input terminal of the source-degenerated common-source amplifier and an input terminal of the common-gate amplifier and determine a matching frequency band. | 03-11-2010 |
20100135446 | DIGITAL-INTENSIVE RF RECEIVER - A digital-intensive RF receiver including: a first filter unit configured to allow an RF signal of a pre-set frequency band among RF signals to pass therethrough; a low noise amplifier (LNA) configured to amplify the RF signal from the first filter unit such that the RF signal has a pre-set magnitude; a second filter unit configured to allow an RF signal of a pre-set frequency band among RF signals from the LNA to pass therethrough; a clock generation unit configured to generate a pre-set reference frequency signal and generate a sub-sampling clock having a pre-set frequency lower than an RF carrier frequency by using the reference frequency signal; a sub-sampling A/D conversion unit configured to A/D-convert the RF signal from the second filter unit into a digital signal according to the sub-sampling clock from the clock generation unit, divide the RF signal into a plurality of frequency bands and sub-sample them during the A/D conversion process and perform noise shaping by the sub-channels included in the RF signal; and a digital processing unit configured to process a digital signal from the sub-sampling A/D conversion unit according to a system clock generated by using the reference frequency signal from the clock generation unit. | 06-03-2010 |
20100322361 | DIGITAL RECEIVER - In a digital receiver, a noise attenuation and signal magnitude mapping variable amplifying unit includes a filter and an amplifier, amplifies and band-bass filters an analog signal and attenuating white noise and an interference signal other than a band signal. An ADC performs sub sampling on a carrier frequency of a desired signal and performs oversampling on the band of the desired signal by using a sampling frequency to convert the analog signal which has passed through the noise attenuation and signal magnitude mapping variable amplifying unit into a digital signal of a direct conversion frequency band or an intermediate frequency band. The ADC has a dynamic range for processing both the desired signal and an undesired signal adjacent to the desired signal. A digital signal processing unit converts a signal frequency of the digital signal or digital-filters an undesired signal within the digital signal and processes the digital signal by digitally adjusting a gain. | 12-23-2010 |
20110026571 | AUTOMATIC GAIN CONTROLLER, TRANSCEIVER AND AUTOMATIC GAIN-CONTROL METHOD THEREOF - An automatic gain-control method for a communication system is comprised of determining a communication distance between the first and second transceivers and controlling gain values of transception stages of the first and second transceivers in correspondence with the communication distance. | 02-03-2011 |
20110148490 | TIME-TO-DIGITAL CONVERTER AND ALL DIGITAL PHASE-LOCKED LOOP INCLUDING THE SAME - An all digital phase-locked loop (ADPLL) includes: a phase counter accumulating a frequency setting word value and the phase of a digitally controlled oscillator (DCO) clock and detecting a fine phase difference between a reference clock and a retimed clock; a phase detector detecting a digital phase error value compensating for a phase difference between the frequency setting word value and the DCO clock according to the fine phase difference to detect a digital phase error value; a digital loop filter filtering the digital phase error value and controlling PLL operational characteristics; a lock detector generating a lock indication signal according an output of the digital loop filter; a digitally controlled oscillator varying the frequency of the DCO clock according to the output from the digital loop filter; and a retimed clock generator generating the retimed clock by retiming the DCO clock at a low frequency. | 06-23-2011 |
20110148684 | SUCCESSIVE APPROXIMATION ANALOG-TO-DIGITAL CONVERTER - There is provided a successive approximation analog-to-digital converter including only minimal capacitors to perform an analog-to-digital conversion operation, thereby making it possible to have very strong process change resistance characteristics while having reduced capacitance and circuit area. The successive approximation analog-to-digital converter may include a reference current supplying unit that supplies a reference current; a signal storage unit that stores a reference signal generated by charging the reference current and an input signal input from the outside; a comparing unit that compares the reference signal and the input signal; and a controller that controls the reference current supplying unit while generating the digital output signal based on the comparison result of the comparing unit to change the supply amount of the reference current supplied to the signal storage unit in proportion to the binary code. | 06-23-2011 |
20110194657 | SUBSAMPLING BASED RECEIVER USING FREQUENCY SELECTIVE NOISE CANCELLER - Provided is a frequency selective noise canceller including: a frequency selective single to differential converter having a band pass filter function, converting a received single input signal into a differential signal in a wanted signal pass frequency band and into a common mode signal in an unwanted signal frequency band; and a common mode rejector functioning as a load having an arbitrary impedance with respect to the differential signal outputted from the frequency selective single to differential converter and functioning as a filter with respect to the common mode signal. | 08-11-2011 |
20110194658 | DIGITAL FRONT-END STRUCTURE OF SUB-SAMPLING BASED DIGITAL RECEIVER - Provided is a digital receiver for use in a wireless communication transmitting/receiving system. The digital receiver oversamples a desired-band signal during performing a subsampling operation for converting an RF signal into an IF signal or DC signal so that an unwanted signal is also converted into a digital signal, and then, eliminated in a digital block. | 08-11-2011 |
20130063199 | PROGRAMMABLE COMPLEX MIXER - Disclosed is a programmable complex mixer. In accordance with the embodiments of the present invention, it is possible to control an output by programming paths and signs of internal signals in a complex mixer to reduce a processing bandwidth, power consumption, and a chip area in a transceiver, thereby improving performance of a transceiver. | 03-14-2013 |
20130064148 | SINGLE FREQUENCY SYNTHESIZER BASED FDD TRANSCEIVER - The present invention relates to a single frequency synthesizer based FDD transceiver. A single frequency synthesizer generates and provides a carrier frequency so that frequency up-conversion and frequency down-conversion can be performed at the time of transmission and reception. Accordingly, the area, power consumption, and design complexity of the entire system can be reduced, and the performance of the system can be improved. | 03-14-2013 |
20130082756 | SIGNAL INPUT DEVICE OF DIGITAL-RF CONVERTER - The present invention provides a signal input device of a digital-RF converter including: a phase-modulated signal input unit configured to input a phase-modulated carrier signal to an LO switch of a digital-RF converter; and a digital signal input unit configured to correct a digital signal to correspond to the phase-modulated carrier signal, and input the corrected digital signal to a data switch of the digital-RF converter. | 04-04-2013 |
20130156141 | DIGITAL RADIO FREQUENCY (RF) RECEIVER - A digital RF receiver does not use a separate receiver according to a mode and a band for multi-mode reception, MIMO reception, and bandwidth extension reception, and changes only setting variables in a single receiver structure so as to implement multi-mode reception, MIMO reception, bandwidth extension reception, and/or simultaneous multi-mode operation, such that complexity of the receiver, development cost, and power consumption can be reduced. | 06-20-2013 |
20130178179 | SUBSAMPLING RECEIVER USING INTERSTAGE OFF-CHIP RF BAND PASS FILTER - The inventive concept relates to a wireless communication receiver. The wireless communication receiver includes a second off-chip RF filter, an RF-to-digital converter and a digital pre-processor processing a signal converted into a digital. The RF-to-digital converter converts an RF signal being received into a digital signal of DC frequency band or intermediate frequency band and has a dynamic range that can process a wanted RF band signal and unwanted signals near to the wanted RF band signal. The digital pre-processor digitally controls a signal gain to transmit it to a modulator/demodulator. | 07-11-2013 |
20130268572 | ACCUMULATOR AND DATA WEIGHTED AVERAGE DEVICE INCLUDING THE ACCUMULATOR - Disclosed are an accumulator for reducing nonlinearity of a data converter and a data weighted average device including the accumulator. According to the accumulator including a register configured to output input data according to a clock signal; a first adder configured to receive a digital input signal having any bit width and an output signal from the register to perform an add operation; a preset unit configured to output a preset value or a 0 value according to whether a carry of the first adder is generated; and a second adder configured to receive an output signal of the first adder and an output signal of the preset unit to perform the add operation and input the add operation to the register and the data weighted average device including the accumulator, it is possible to improve the nonlinearity occurring in the data converter by generating a number of DAC codes in addition to 2 | 10-10-2013 |
20140044221 | DIGITAL RF RECEIVER - Embodiments provide a digital RF receiver including a signal converting unit which converts an RF signal received from an external device into a digital signal, a plurality of functional modules which processes the digital signal in accordance with a predetermined algorithm when the digital signal is input, and a signal processing controller which selects at least one of the plurality of functional modules to control the digital signal to be processed in consideration of whether an IF signal component is included in the digital signal or a sampling rate related with sampling information of the digital signal. | 02-13-2014 |
Patent application number | Description | Published |
20120147511 | SMART GROUND BONDING METHOD FOR FACILITIES - Disclosed is a smart ground bonding method for facilities, wherein an electric wire is connected between a first facility and a second facility, a first surge protection device is connected between the first facility and the electric wire, a second surge protection device is connected between the electric wire and the second facility, and wherein ground terminals of the first and second surge protection devices are bonded to metal boxes of the first and second facilities and sides of the bonded metal boxes are connected to the ground. The present invention can form potential differences between all lines of facilities such that they correspond to an equipotential to a ground, blocking a surge current passing through the facilities and basically preventing damage due to a lightning surge. | 06-14-2012 |
20130021114 | DEVICE FOR IMPROVING POWER QUALITY - A device for improving power quality is installed on a power line, for removing noise that flows into the power line, characterized by: a reactor having a first coil and a second coil wound on a core disposed between the input end and the output ends of the power line, wherein in the reactor, the first end of the first coil is connected to the input end of a first power line, the second end of the first coil is connected to the output end of the first power line, and the first end of the second coil is connected to the output end of the second power line, and the second end of the second coil is connected to the input end of the second power line. | 01-24-2013 |
20150103461 | SURGE PROTECTOR HAVING IMPROVED I-SHAPED LOAD STRUCTURE - Provided is a surge protector having an improved I-shaped load structure. The surge protector includes an outside conductor provided with input and output terminals on both sides thereof, an input terminal configured such that a high frequency signal is input from the outside thereto, an output terminal configured such that a high frequency signal is output therefrom, an inside conductor disposed inside the outside conductor to electrically connect the input and output terminals to each other, and an I-shaped load configured such that a lower end thereof is connected from a center of the outside conductor to the inside conductor and an upper end thereof is connected to the outside conductor. A dielectric partition is formed to have a predetermined height in a direction from the bottom of the I-shaped load to the top thereof. | 04-16-2015 |
Patent application number | Description | Published |
20110116175 | ZOOM LENS ASSEMBLY - A zoom lens assembly includes a first barrel including a first lens group; a second barrel including a second lens group that is aligned with respect to an optical axis of the first lens group, the second barrel disposed in front of the first lens group so as to be position-adjustable along the optical axis with respect to the first barrel; and a first ray shielding plate disposed in front of the first barrel and between the first barrel and the second barrel, and whose position is varied to be close to a center of the optical axis or to be distant from the center of the optical axis so as to block a portion of incident light that enters into the first barrel according to relative positions of the first barrel and the second barrel. | 05-19-2011 |
20110122252 | DIGITAL IMAGE PROCESSING APPARATUS AND PHOTOGRAPHING METHOD OF DIGITAL IMAGE PROCESSING APPARATUS - A digital image processing apparatus including an infrared (IR) cut filter and a visible light cut filter that are arranged on an optical axis between a lens unit and an image sensor, and that are selectively retractable from the optical axis, a filter driver that drives the IR cut filter and the visible light cut filter, a first image information acquiring unit that acquires first image information transmitted through the IR cut filter, a second image information acquiring unit that acquires second image information transmitted through the visible light cut filter, and an image synthesizing unit that extracts a synthesized image from the first image information and the second image information, in a low-illumination mode. | 05-26-2011 |
20110134542 | ZOOM LENS SYSTEM - A zoom lens system including at least one lens group that is positioned to be movable along an optical axis of image light for photographing; and a movable frame including a plurality of selection lens groups, the movable frame being movable between a photographing position and a storage position, wherein the photographing position is a position in which one of the selection lens groups is selectively positioned on the optical axis, and the storage position is a position in which all of the selection lens groups are outside the optical axis, and the movable frame including a storage portion that houses at least a portion of the at least one lens group when the movable frame is moved to the storage position. | 06-09-2011 |