Patents Assigned to Integrant Technologies, Inc.
-
Patent number: 7781821Abstract: Provided is a parallel-varactor capacitor. The capacitor comprises a first varactor and a second varactor. The first varactor has a first capacitance which varies depending on voltages applied to a first anode and a first cathode. The second varactor has a second capacitance which varies depending on voltages applied to a second anode and a second cathode. The first anode is connected to the second cathode and the first cathode is connected to the second anode.Type: GrantFiled: July 19, 2007Date of Patent: August 24, 2010Assignee: Integrant Technologies Inc.Inventor: Seyeob Kim
-
Patent number: 7756499Abstract: The receiver comprises a variable gain amplification unit, a mixing unit, a filtering unit, and three compensation unit. Each compensation unit detects powers of the signal amplified in the variable gain amplification unit, the signal down-converted in the mixing unit and the signal filtered in the filtering unit. A gain of the variable gain amplification unit is adjusted based on the powers detected by three compensation units.Type: GrantFiled: August 22, 2007Date of Patent: July 13, 2010Assignee: Integrant Technologies Inc.Inventors: Bonkee Kim, Bo-Eun Kim
-
Patent number: 7684772Abstract: A tuner down-converts a Radio Frequency (RF) wireless signal and outputs the converted signal. The tuner compensates for a TOP depending on a temperature and: detects a received signal strength depending on a RF output of the tuner and transmitting the detected strength to a gain control unit; measures an operating temperature of the tuner and transmits the measured temperature value; receives the measured temperature value to compare the received temperature value with a reference TOP value, compensating compensates for the TOP value depending on variation in temperature and outputting outputs the compensated value; and receives the compensated value to control the RF output based on the TOP value and the received signal strength.Type: GrantFiled: December 16, 2005Date of Patent: March 23, 2010Assignee: Integrant Technologies Inc.Inventors: Junghwan Lee, Bonkee Kim
-
Patent number: 7605655Abstract: There is provided a highly linear differential amplifying circuit. The highly linear differential amplifying circuit includes: a differential amplifying unit including a main differential amplifying unit having a differential pair of transistors for amplifying a difference of two input signals and an auxiliary amplifying unit connected in parallel with the main differential amplifying unit, wherein second-order derivatives of transconductances of the main differential amplifying unit and the auxiliary differential amplifying unit are properly set to have an offset; and a source degeneration resistor unit including a first source degeneration resistor to a fourth source degeneration resistor. Accordingly, the linearity of the differential amplifying circuit is improved at a wide output power region.Type: GrantFiled: May 29, 2008Date of Patent: October 20, 2009Assignee: Integrant Technologies Inc.Inventors: Jongsik Kim, Sangwon Han, Hyunchol Shin
-
Patent number: 7602227Abstract: The present invention relates to a differential amplifier and a mixer for improving the linearity. The differential amplifier circuit according to this present invention, includes first and second load stages each having a predetermined voltage value, a main differential amplifier unit having a first differential stage that forms a differential pair in such a way as to amplify a difference between a first input voltage and a second input voltage, and a constant current source, which has a predetermined current driving capability and is connected serially between a power source voltage terminal and a ground terminal, and a auxiliary differential amplifier unit having a second differential stage that forms a differential pair in such a way as to amplify a difference between a third input voltage and a fourth input voltage connected between the first load stage and a second load stage, and the ground, respectively.Type: GrantFiled: May 13, 2005Date of Patent: October 13, 2009Assignee: Integrant Technologies Inc.Inventors: Tae Wook Kim, Bonkee Kim, Kwyro Lee
-
Patent number: 7603091Abstract: The present invention relates to a hybrid balun apparatus and a receiver thereof. The hybrid balun apparatus comprises a passive unit, a first active unit, and a second active unit. The passive unit receives an input signal, and outputs an in-phase signal having an identical phase compared to the input signal and an inverse-phase signal having an inverse phase compared to the input signal. The first active unit compensates the in-phase signal of the passive unit corresponding to the input signal. The second active unit compensates the in-phase signal of the passive unit in response to the input signal.Type: GrantFiled: July 17, 2006Date of Patent: October 13, 2009Assignee: Integrant Technologies, Inc.Inventor: Hyunchol Shin
-
Patent number: 7586375Abstract: The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit unit. According to the present invention, the common gate circuit includes a main circuit unit consisting of a common gate circuit having a drain terminal through which an input signal is output as an output signal, an assistant circuit unit having a common gate circuit in order to assist the linearity of the main circuit unit, a biasing unit for biasing the main circuit unit and the assistant circuit unit, respectively, and load stages connected to output stages of the main circuit unit and the assistant circuit unit, wherein the output stages of the main circuit unit and the assistant circuit unit are coupled to each other.Type: GrantFiled: June 25, 2008Date of Patent: September 8, 2009Assignee: Integrant Technologies Inc.Inventors: Tae Wook Kim, Bonkee Kim, Kwyro Lee
-
Patent number: 7565124Abstract: Disclosed herein is an automatic gain control circuit including a power detector. The automatic gain control circuit includes a receiving unit for receiving an RF signal and a gain control unit for controlling the gain of the receiving unit. The receiving unit comprises an amplification part including a low noise amplifier and a gain amplifier for amplifying the RF signal, a mixer for down-converting and tuning the RF signal output from the gain amplifier, a low pass filter for receiving the down-converted signal from the mixer, and an intermediate frequency variable gain amplifier for amplifying the signal filtered by the low pass filter to an intermediate frequency signal.Type: GrantFiled: July 12, 2005Date of Patent: July 21, 2009Assignee: Integrant Technologies Inc.Inventors: Junghwan Lee, Bonkee Kim
-
Patent number: 7561861Abstract: A tuning circuit of a filter is disclosed to correct a cut-off frequency of the filter. The tuning circuit comprises a current generation unit which includes a first transistor and a resistor, and a capacitor compensation unit which includes a second transistor and a capacitor unit.Type: GrantFiled: May 12, 2006Date of Patent: July 14, 2009Assignee: Integrant Technologies Inc.Inventors: Seyeob Kim, Minsu Jeong
-
Patent number: 7555073Abstract: Provided is a frequency control loop circuit changing division ratios of a frequency synthesizer to oscillate frequencies in a broadband with high precision. The circuit comprises a clock oscillator, a frequency synthesizer, and a demodulator.Type: GrantFiled: July 14, 2006Date of Patent: June 30, 2009Assignee: Integrant Technologies Inc.Inventor: Minsu Jeong
-
Patent number: 7539470Abstract: The present invention relates to a filter, and more particularly, to a tracking filter for selecting a channel of a wideband frequency. The tracking filter for selecting a channel of a wideband frequency, which is for increasing the selectivity of a wideband frequency, includes: a first tracking portion for filtering and amplifying a specific frequency band while converting a low input impedance of the input terminal of the tracking filter into a high impedance; a second tracking portion for maintaining the high impedance of the first tracking portion, and for filtering and amplifying the specific frequency band while increasing the selectivity Q of a frequency outputted from the first tracking portion; and a third tracking portion for filtering the specific band wherein has low input impedance and high output impedance.Type: GrantFiled: March 30, 2006Date of Patent: May 26, 2009Assignee: Integrant Technologies, Inc.Inventors: Tae Wook Kim, Dong Gu Lim, Bonkee Kim, Junghwan Lee, Kwyro Lee
-
Patent number: 7525386Abstract: The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit unit. According to the present invention, the common gate circuit includes a main circuit unit consisting of a common gate circuit having a drain terminal through which an input signal is output as an output signal, an assistant circuit unit having a common gate circuit in order to assist the linearity of the main circuit unit, a biasing unit for biasing the main circuit unit and the assistant circuit unit, respectively, and load stages connected to output stages of the main circuit unit and the assistant circuit unit, wherein the output stages of the main circuit unit and the assistant circuit unit are coupled to each other.Type: GrantFiled: June 25, 2008Date of Patent: April 28, 2009Assignee: Integrant Technologies Inc.Inventors: Tae Wook Kim, Bonkee Kim, Kwyro Lee
-
Patent number: 7522902Abstract: Provided are a direct current (DC) offset compensation apparatus and a method thereof. A DC offset compensation apparatus comprises an offset detection block detecting a DC offset, an offset compensation block operating according to an output signal of the offset detection block, and an offset compensation amplifying block controlled according to an output signal of the offset compensation block. Particularly, the offset compensation block comprises a counter that counts polarities of DC offsets for a predetermined period, a controller that comprises first to fourth mode units respectively operating fast down-compensation, regular down-compensation, fast up-compensation, and regular up-compensation modes, and a control device that controls the execution of one selected among the first to fourth mode units based on a value counted by the counter, and a register storing data to control the offset compensation amplifying block based on the one mode unit determined by the controller.Type: GrantFiled: August 23, 2006Date of Patent: April 21, 2009Assignee: Integrant Technologies Inc.Inventors: Jungwan Lee, Jinkyu Lim
-
Patent number: 7463085Abstract: The present invention relates to a filter and, more particularly, to a tuning circuit of a filter for correcting a cut-off frequency of the filter. The tuning circuit comprises a current generation unit having a first transistor and a variable resistor unit, and a capacitance correction unit having a second transistor, a capacitor unit, an up-down counter and a selection unit for selecting a control path of the up-down counter for varying the resistance or capacitance.Type: GrantFiled: June 21, 2006Date of Patent: December 9, 2008Assignee: Integrant Technologies Inc.Inventors: Seyeob Kim, Minsu Jeong
-
Patent number: 7414475Abstract: A linearity-improved differential amplification circuit is provided, A linearity-improved differential amplification circuit comprises a main differential amplification unit differentially amplifying a first and a second input signals, a main bias unit biasing the main differential amplification unit, a first current source coupled in series between a power supply voltage terminal and the main bias unit and an auxiliary differential amplification unit differentially amplifying the first and the second input signal and coupled to the main differential amplification unit.Type: GrantFiled: August 23, 2006Date of Patent: August 19, 2008Assignee: Integrant Technologies Inc.Inventor: Tae Wook Kim
-
Patent number: 7408411Abstract: Disclosed is a high linearity programmable gain amplifier using a switch, including an attenuating portion for controlling a gain of a signal and an amplifying portion having a first amplifying part and a second amplifying part, for amplifying an input signal and outputting a signal amplified, wherein the first amplifying part has a first amplifier for amplifying an input signal and a first switch for activating the first amplifier and the second amplifying part has a second amplifier for amplifying an input signal and a second switch for activating the second amplifier.Type: GrantFiled: August 11, 2005Date of Patent: August 5, 2008Assignee: Integrant Technologies Inc.Inventors: Tae Wook Kim, Bonkee Kim, Kwyro Lee
-
Patent number: 7405619Abstract: Provided is a frequency converter using an amplification circuit that is improved with linearity by coupling a main transistor and an auxiliary transistor in parallel. An amplification circuit that is improved with linearity comprises an input block amplifying an input signal, an induction block inducing a current proportionate to an output signal of the input block and an amplification block comprising. The amplification block comprises a main transistor amplifying the output signal of the induction block, wherein the main transistor is biased to operate at a saturation region and an auxiliary transistor amplifying the output signal of the induction block, wherein the auxiliary transistor is biased to operate at a subthreshold region and coupled to the main transistor in parallel.Type: GrantFiled: August 25, 2006Date of Patent: July 29, 2008Assignee: Integrant Technologies Inc.Inventor: Tae Wook Kim
-
Patent number: 7400192Abstract: A low noise amplifier (LNA), and more particularly, to a LNA capable of making gain variable is provided. The variable gain LNA comprises a selection unit comprising a first selection cell, a second selection cell, and a third selection cell for selectively transmitting an input signal to an amplification unit to select one of the first to third selection cells in accordance with the magnitude of the input signal and an amplification unit comprising a first amplification cell for amplifying a signal applied from the first selection cell to a first gain mode and outputting, a second amplification cell for amplifying a signal applied from the second selection cell to a second gain and outputting, and a third amplification cell for amplifying a signal applied from the third selection cell to a third gain mode and outputting.Type: GrantFiled: March 28, 2006Date of Patent: July 15, 2008Assignee: Integrant Technologies Inc.Inventors: Youngho Cho, Bonkee Kim, Seong-Ho Park
-
Patent number: 7400198Abstract: The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit unit. According to the present invention, the common gate circuit includes a main circuit unit consisting of a common gate circuit having a drain terminal through which an input signal is output as an output signal, an assistant circuit unit having a common gate circuit in order to assist the linearity of the main circuit unit, a biasing unit for biasing the main circuit unit and the assistant circuit unit, respectively, and load stages connected to output stages of the main circuit unit and the assistant circuit unit, wherein the output stages of the main circuit unit and the assistant circuit unit are coupled to each other.Type: GrantFiled: July 12, 2005Date of Patent: July 15, 2008Assignee: Integrant Technologies Inc.Inventors: Tae Wook Kim, Bonkee Kim, Kwyro Lee
-
Patent number: 7362183Abstract: An amplifier circuit improved in linearity and frequency band comprises an amplification block, a feedback block and an output block. The amplification block comprises a main transistor, an auxiliary transistor, a first capacitor, a second capacitor, a main transistor bias unit, and an auxiliary transistor bias unit. The main transistor bias unit comprises a first bias resistor. The auxiliary transistor bias unit comprises a second bias resistor. The feedback block comprises first and second feedback resistors, and the output block comprises an output resistor and an output transistor.Type: GrantFiled: August 15, 2006Date of Patent: April 22, 2008Assignee: Integrant Technologies, Inc.Inventors: Tae Wook Kim, Bonkee Kim, Kwyro Lee