Patents by Inventor Jongchan Kang
Jongchan Kang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11525878Abstract: A superconductor magnetic field effect transistor. The superconductor magnetic field effect transistor may include a sheet of a superconducting material; and a solenoid. The sheet may be substantially flat, and the solenoid may include a plurality of turns, each of the turns being substantially parallel to the sheet. The superconducting material may be a type-II superconducting material.Type: GrantFiled: November 17, 2020Date of Patent: December 13, 2022Assignee: HRL Laboratories, LLCInventors: Yeong Yoon, Jongchan Kang
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Patent number: 11323072Abstract: A unit cell for a resistive mixer includes a plurality of active devices arranged in series, wherein each of said plurality of active devices having a different output conductance. A resistive mixer includes a plurality of active devices connected in series with one another to form a unit cell.Type: GrantFiled: May 26, 2021Date of Patent: May 3, 2022Assignee: HRL Laboratories, LLCInventors: Jongchan Kang, Ara K. Kurdoghlian
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Patent number: 11221395Abstract: A radar system includes a transmit section to emit a transmit signal. A chip-based front-end portion of the transmit section increases a frequency of an input signal to produce an intermediate signal and amplifies signal strength of the intermediate signal to produce the transmit signal. The frequency of the input signal is in a range of 76 gigahertz (GHz) to 80 GHz. The radar system also includes a receive section to receive a reflected signal resulting from reflection of the transmit signal by an object.Type: GrantFiled: August 12, 2019Date of Patent: January 11, 2022Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Mehran Mokhtari, Ara Kurdoghlian, Jongchan Kang, Daniel Kuzmenko, Emilio A. Sovero, Robert G. Nagele, Hasan Sharifi, Igal Bilik
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Patent number: 11063560Abstract: A unit cell for a resistive mixer includes a plurality of active devices arranged in series, wherein each of said plurality of active devices having a different output conductance. A resistive mixer includes a plurality of active devices connected in series with one another to form a unit cell.Type: GrantFiled: November 26, 2019Date of Patent: July 13, 2021Assignee: HRL Laboratories, LLCInventors: Jongchan Kang, Ara K. Kurdoghlian
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Patent number: 11054598Abstract: An optical transmitter includes a superconducting driver circuit including at least one Josephson junction, the superconducting driver circuit having a voltage output and having a connection to a circuit ground, a first bias circuit coupled to the voltage output of the superconducting driver circuit, a second bias circuit, wherein the second bias circuit establishes a positive bias voltage relative to the circuit ground, and an electro-optic device having a first end and a second end, wherein the first end of the electro-optic device is coupled to the voltage output of the superconducting driver circuit, and wherein the second end of the electro-optic device is coupled to the second bias circuit.Type: GrantFiled: November 12, 2019Date of Patent: July 6, 2021Assignee: HRL Laboratories, LLCInventors: Daniel Yap, Jongchan Kang
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Publication number: 20210048508Abstract: A radar system includes a transmit section to emit a transmit signal. A chip-based front-end portion of the transmit section increases a frequency of an input signal to produce an intermediate signal and amplifies signal strength of the intermediate signal to produce the transmit signal. The frequency of the input signal is in a range of 76 gigahertz (GHz) to 80 GHz. The radar system also includes a receive section to receive a reflected signal resulting from reflection of the transmit signal by an object.Type: ApplicationFiled: August 12, 2019Publication date: February 18, 2021Inventors: Mehran Mokhtari, Ara Kurdoghlian, Jongchan Kang, Daniel Kuzmenko, Emilio A. Sovero, Robert G. Nagele, Hasan Sharifi, Igal Bilik
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Patent number: 10797647Abstract: A receiver apparatus is provided. The apparatus includes a single field effect transistor mixer comprising a gate, a source and a drain, wherein one of the source or the drain is configured to receive a first signal from a first low noise amplifier at a receiving frequency and another of the source or the drain is configured to output a second signal at an intermediate frequency to a second low noise amplifier; and a local oscillator configured to apply a third signal to the gate.Type: GrantFiled: August 5, 2019Date of Patent: October 6, 2020Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Mehran Mokhtari, Jongchan Kang, Ara Kurdoghlian, Daniel Kuzmenko, Emilio A. Sovero, Robert G. Nagele, Hasan Sharifi, Igal Bilik
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Patent number: 10742208Abstract: A circuit for driving a switched transistor comprises: a level shifter comprising at least one transistor, the level shifter configured to convert an input pulse to a pulse having a greater voltage swing than the input pulse and shift a voltage level of the converted pulse; and a pulse shaping filter coupled between the level shifter and the gate of the switched transistor, the pulse shaping filter tuned to cancel or reduce an impedance of the gate of the switched transistor. The switched transistor and/or the at least one transistor are a GaN High Electron Mobility Transistor (HEMT).Type: GrantFiled: February 8, 2019Date of Patent: August 11, 2020Assignee: HRL Laboratories, LLCInventors: Harris P. Moyer, Jongchan Kang, Hasan Sharifi, Ara K. Kurdoghlian, James Lazar
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Patent number: 10523156Abstract: A unit cell for a resistive mixer includes a plurality of active devices arranged in series, wherein each of said plurality of active devices having a different output conductance. A resistive mixer includes a plurality of active devices connected in series with one another to form a unit cell.Type: GrantFiled: June 29, 2017Date of Patent: December 31, 2019Assignee: HRL Laboratories, LLCInventors: Jongchan Kang, Ara K. Kurdoghlian
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Patent number: 10404293Abstract: A method and apparatus for dynamically modifying filter characteristics of a Delta-Sigma modulator to accommodate for Doppler shift. A transceiver in a wireless cellular communication system for adapt to changes in the RF carrier frequency for maintaining signal integrity by applying a pilot tone in calibration to determine a frequency shift response for a bandpass filter. During operation, the system is operative to determine a Doppler shift and to shift the bandpass filter in response.Type: GrantFiled: July 11, 2017Date of Patent: September 3, 2019Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Timothy J. Talty, Cynthia D. Baringer, Mohiuddin Ahmed, Jongchan Kang, Yen-Cheng Kuan, James Chingwei Li, Emilio A. Sovero
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Publication number: 20190190533Abstract: A method and apparatus for utilizing a wideband radio frequency filter to capture an FM frequency band and configuring the characteristics of a delta-sigma modulator in order to processes desired signals within the FM frequency band. Specifically, the system and method are operative to receive a plurality of FM signals within an FM frequency band, filter the frequency band using a wideband filter, modulating the plurality of FM signals using a delta sigma modulator, down converting and processing the desired signals in parallel.Type: ApplicationFiled: December 19, 2017Publication date: June 20, 2019Inventors: CYNTHIA D BARINGER, MOHIUDDIN AHMED, JONGCHAN KANG, JAMES CHINGWEI LI, EMILIO A SOVERO, TIMOTHY J TALTY
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Publication number: 20190020311Abstract: A unit cell for a resistive mixer includes a plurality of active devices arranged in series, wherein each of said plurality of active devices having a different output conductance. A resistive mixer includes a plurality of active devices connected in series with one another to form a unit cell.Type: ApplicationFiled: June 29, 2017Publication date: January 17, 2019Applicant: HRL Laboratories, LLCInventors: Jongchan Kang, Ara K. Kurdoghlian
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Patent number: 10177741Abstract: Several embodiments of an envelope tracking active circulator is disclosed with a method to cascade them. In an active transistor based circulator (active circulator), gate (base) and drain (collector) bias voltage can be adjusted by RF or microwave input envelop signal. This is called envelop tracking active circulator. In this concept, input RF signal is detected by detection circuit, such as detection diode or coupler and converted into low frequency envelop signal by the proper filtering circuitry. The generated envelop signal controls the supply voltage of the drain and gate with the proper function of the envelop signal to improve active circulator insertion loss, isolation and power handling capability. This concept can be applied to any type of solid-state FET (Field effect transistor) transistor based active circulator, as long as they have bias dependent trans-conductance and capacitances inside.Type: GrantFiled: August 18, 2016Date of Patent: January 8, 2019Assignee: HRL Laboratories, LLCInventors: Jongchan Kang, Hasan Sharifi
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Patent number: 10158344Abstract: A single-chip tunable bandpass filter is provided having a bandpass filter circuit with all tuning components for the bandpass filter circuit formed on the single-chip to provide a programmed center frequency for the tunable bandpass filter. The bandpass filter circuit may include, but is not limited to, a plurality of serially coupled singe stage biquad filter circuits coupled to an input formed on the single-chip and configured to provide a bandpass filtered output signal to an output formed on the single-chip. The bandpass filtered output may be provided by an output buffer formed on the single-chip. The single-chip includes at least one tuning input to receive data for tuning stored in a data register formed on the single-chip. The data register provides control bits to the tuning components that include a programmable resistor responsive to the control bits to vary the programmable resistor to adjust programmed center frequency.Type: GrantFiled: January 13, 2017Date of Patent: December 18, 2018Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Emilio A. Sovero, Jongchan Kang, Mohiuddin Ahmed, James Chingwei Li, Cynthia D. Baringer, Yen-Cheng Kuan, Timothy J. Talty
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Patent number: 10110247Abstract: A method and apparatus for temperature compensation for data converters in a software defined radio. Specifically, the system and method are teach monitoring the temperature of critical signal processing components such as band pass filters, ADCs and DACs and retrieving modulator coefficients in response to the temperatures and the like. The modulator coefficients are then used to compensate for temperature changes, performance changes and the like.Type: GrantFiled: December 19, 2017Date of Patent: October 23, 2018Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Cynthia D Baringer, Mohiuddin Ahmed, Jongchan Kang, James Chingwei Li, Emilio A Sovero, Timothy J Talty
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Patent number: 10056340Abstract: An electronic circuit comprising: an integrated circuit chip, the integrated circuit chip having a top face; portions of the top face of the chip being covered by a first metal layer electrically connected to the integrated circuit; and a dialectic layer formed on the top face of the chip beside and on top of said first metal layer; wherein the dielectric layer extends parallel to the top face of the chip beyond the edges of the chip, the first metal layer extending in the dielectric layer beyond the edges of the chip; and wherein portions of a top surface of the dielectric layer are covered by a second metal layer, portions of the first and second metal layers being electrically connected through the dielectric layer.Type: GrantFiled: November 8, 2016Date of Patent: August 21, 2018Assignee: HRL Laboratories, LLCInventors: Hasan Sharifi, Keisuke Shinohara, Mary C. Montes, Charles McGuire, Wonill Ha, Jason May, Hooman Kazemi, Jongchan Kang, Robert G. Nagele
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Publication number: 20180205367Abstract: A single-chip tunable bandpass filter is provided having a bandpass filter circuit with all tuning components for the bandpass filter circuit formed on the single-chip to provide a programmed center frequency for the tunable bandpass filter. The bandpass filter circuit may include, but is not limited to, a plurality of serially coupled singe stage biquad filter circuits coupled to an input formed on the single-chip and configured to provide a bandpass filtered output signal to an output formed on the single-chip. The bandpass filtered output may be provided by an output buffer formed on the single-chip. The single-chip includes at least one tuning input to receive data for tuning stored in a data register formed on the single-chip. The data register provides control bits to the tuning components that include a programmable resistor responsive to the control bits to vary the programmable resistor to adjust programmed center frequency.Type: ApplicationFiled: January 13, 2017Publication date: July 19, 2018Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: EMILIO A. SOVERO, JONGCHAN KANG, MOHIUDDIN AHMED, JAMES CHINGWEI LI, CYNTHIA D. BARINGER, YEN-CHENG KUAN, TIMOTHY J. TALTY
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Publication number: 20180167095Abstract: A wide bandwidth radio system designed to adapt to various global radio standards and, more particularly, to a system and method incorporate a compact receiver array design to support the demand for increased mobile broadband services using a through-silicon vias to interconnect front-end analog functions in SiGe BiCMOS to backend circuitry in CMOS.Type: ApplicationFiled: December 14, 2016Publication date: June 14, 2018Inventors: Cynthia D. BARINGER, Mohiuddin AHMED, Jongchan KANG, Yen-Cheng KUAN, James Chingwei LI, Emilio A. SOVERO, Timothy J. TALTY
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Publication number: 20180115328Abstract: A method and apparatus for dynamically modifying filter characteristics of a delta-sigma modulator in order to perform signal equalization of a signal in the delta signal modulator. The system is used for wide bandwidth radio system designed to adapt to various global radio standards and, more particularly, to a cellular radio architecture that employs a combination of a single circulator, programmable band-pass sampling radio frequency (RF) front-end and optimized digital baseband that is capable of supporting all current cellular wireless access protocol frequency bands.Type: ApplicationFiled: October 20, 2016Publication date: April 26, 2018Inventors: Yen-Cheng KUAN, Mohiuddin AHMED, Cynthia BARINGER, Jongchan KANG, James Chingwei LI, Emilio A. SOVERO, Timothy J. TALTY
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Publication number: 20180109272Abstract: A method and apparatus for dynamically modifying filter characteristics of a Delta-Sigma modulator to accommodate for Doppler shift. A transceiver in a wireless cellular communication system for adapt to changes in the RF carrier frequency for maintaining signal integrity by applying a pilot tone in calibration to determine a frequency shift response for a bandpass filter. During operation, the system is operative to determine a Doppler shift and to shift the bandpass filter in response.Type: ApplicationFiled: October 18, 2016Publication date: April 19, 2018Inventors: Timothy J. TALTY, Cynthia D. BARINGER, Mohiuddin AHMED, Jongchan KANG, Yen-Cheng KUAN, James Chingwei LI, Emilio A. SOVERO