Patents by Inventor Yun Hsueh Chuang
Yun Hsueh Chuang 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: 8279014Abstract: A frequency synthesizer of a transceiver for generating a crystal oscillation frequency and a carry frequency having been done a process of frequency offset cancellation with that of another transceiver. The frequency offset cancellation of the frequency synthesizer is done in accordance with a wireless signal which is transmitted from another transceiver received. The frequency synthesizer has a first sigma-delta modulator receiving a signal transmitted by a transceiver at far area responding thereafter a frequency divisor value in accordance with the channel information of the received signal and a frequency offset between two.Type: GrantFiled: January 7, 2011Date of Patent: October 2, 2012Assignee: Uniband Electronic Corp.Inventors: Chun-Chin Chen, Yun-Hsueh Chuang, Yi-Chun Lu
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Publication number: 20120176202Abstract: A frequency synthesizer of a transceiver for generating a crystal oscillation frequency and a carry frequency having been done a process of frequency offset cancellation with that of another transceiver. The frequency offset cancellation of the frequency synthesizer is done in accordance with a wireless signal which is transmitted from another transceiver received. The frequency synthesizer has a first sigma-delta modulator receiving a signal transmitted by a transceiver at far area responding thereafter a frequency divisor value in accordance with the channel information of the received signal and a frequency offset between two.Type: ApplicationFiled: January 7, 2011Publication date: July 12, 2012Applicant: UNIBAND ELECTRONIC CORP.Inventors: Chun-Chin CHEN, Yun-Hsueh CHUANG, Yi-Chun LU
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Patent number: 7920030Abstract: A multi-phase voltage-control oscillator including a first voltage-control oscillator circuit and a second voltage-control oscillator circuit is provided. The second voltage-control oscillator circuit and the first voltage-control oscillator circuit have a plurality of inductors, and the inductors in the second voltage-control oscillator circuit are respectively cross-coupled with the inductors in the first voltage-control oscillator circuit to generate a mutual inductance effect, so as to output a plurality of oscillating signals with different phases.Type: GrantFiled: April 29, 2009Date of Patent: April 5, 2011Assignee: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Ren-Hong Yen, Shao-Hua Lee
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Patent number: 7705686Abstract: An injection-locked frequency divider includes a ring oscillator, a signal injection circuit, a first adjustable load circuit and a second adjustable load circuit. The ring oscillator generates an oscillation signal according to a differential signal outputted by the signal injection circuit. According to an adjustable voltage, the first and second adjustable load circuits can respectively change equivalent impedances of the first adjustable load circuit and the second adjustable load circuit so that a free-running frequency of the oscillation signal of the ring oscillator is adjusted and an injection-locked frequency range of the injection-locked frequency divider is expanded.Type: GrantFiled: November 21, 2007Date of Patent: April 27, 2010Assignee: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Shao-Hwa Lee
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Publication number: 20090231047Abstract: A multi-phase voltage-control oscillator including a first voltage-control oscillator circuit and a second voltage-control oscillator circuit is provided. The second voltage-control oscillator circuit and the first voltage-control oscillator circuit have a plurality of inductors, and the inductors in the second voltage-control oscillator circuit are respectively cross-coupled with the inductors in the first voltage-control oscillator circuit to generate a mutual inductance effect, so as to output a plurality of oscillating signals with different phases.Type: ApplicationFiled: April 29, 2009Publication date: September 17, 2009Applicant: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Ren-Hong Yen, Shao-Hua Lee
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Patent number: 7557668Abstract: An injection-locked frequency divider is provided. The injection-locked frequency divider includes a variable reactance unit, a signal injection unit, a first switch, a second switch, a first transformer, and a second transformer. The variable reactance unit, the first switch, the second switch, the first transformer, and the second transformer form a transformer-based LC-tank oscillator. The signal injection unit receives an injection signal. When the injection-locked frequency divider is in a locked state, the transformer-based LC-tank oscillator outputs a frequency division signal. Employing the feedback action of the first transformer and the second transformer, the present invention not only has a wide locking range but also promotes the realization of the low operating voltage.Type: GrantFiled: November 19, 2006Date of Patent: July 7, 2009Assignee: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Ren-Hong Yen, Shao-Hwa Lee
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Patent number: 7551038Abstract: A multi-phase voltage-control oscillator including a first voltage-control oscillator circuit and a second voltage-control oscillator circuit is provided. The first voltage-control oscillator circuit includes a first LC tank and a first inductor assembly unit. The second voltage-control oscillator circuit includes a second LC tank and a second inductor assembly unit. A mutual inductance effect is generated between the inductors of the first voltage-control oscillator and the inductors of the second voltage-control oscillator.Type: GrantFiled: December 28, 2006Date of Patent: June 23, 2009Assignee: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Ren-Hong Yen, Shao-Hua Lee
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Patent number: 7545230Abstract: A voltage control oscillator (VCO) includes a VCO circuit and a back-gate coupling circuit, wherein the VCO circuit includes at least a first transistor, a second transistor and a resonant cavity formed by an inductor and a capacitor. The back-gate coupling circuit is formed by a plurality of capacitors and a plurality of resistors. In the embodiments of the present invention, the capacitors are coupled to the back-gate terminals of the first transistor and the second transistor, so as to reduce the power consumption and the phase noise of the VCO.Type: GrantFiled: February 5, 2007Date of Patent: June 9, 2009Assignee: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Shao-Hua Lee, Yun-Hsueh Chuang, Chung-Ching Chiu
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Publication number: 20090134919Abstract: An input buffer for a high-voltage signal application is provided. The input buffer uses a clamper and an inverter to clamp the output voltage in a proper range even if the input voltage is too high or too low. The proper range of the output voltage is controlled by a voltage source and the ground, so that an electrical device can be triggered safely by the output voltage.Type: ApplicationFiled: November 27, 2007Publication date: May 28, 2009Inventors: Cheng-Hung Chen, Yun-Hsueh Chuang
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Patent number: 7522007Abstract: An injection locked frequency divider includes a signal injection unit, a Hartley voltage controlled oscillator and a biasing unit. The signal injection unit and the biasing unit output an injection signal to the Hartley voltage controlled oscillator to bias the Hartley voltage controlled oscillator. The Hartley voltage controlled oscillator, which includes a first transistor, a second transistor and a LC tank, receives the injection signal and outputs a differential output signal through a first output terminal and a second output terminal. First terminals of the first and second transistors are respectively coupled to the first and second output terminals, and second terminals of the first and second transistors are coupled to a first node. The LC tank decides a resonant frequency of the Hartley voltage controlled oscillator and serves as a positive feedback circuit for the first and second transistors.Type: GrantFiled: August 21, 2007Date of Patent: April 21, 2009Assignee: National Taiwan University of Science & TechnologyInventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Shao-Hwa Lee
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Publication number: 20090033430Abstract: An injection-locked frequency divider includes a ring oscillator, a signal injection circuit, a first adjustable load circuit and a second adjustable load circuit. The ring oscillator generates an oscillation signal according to a differential signal outputted by the signal injection circuit. According to an adjustable voltage, the first and second adjustable load circuits can respectively change equivalent impedances of the first adjustable load circuit and the second adjustable load circuit so that a free-running frequency of the oscillation signal of the ring oscillator is adjusted and an injection-locked frequency range of the injection-locked frequency divider is expanded.Type: ApplicationFiled: November 21, 2007Publication date: February 5, 2009Applicant: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Shao-Hwa Lee
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Patent number: 7446617Abstract: The present invention discloses a low power consumption frequency divider circuit. It mainly comprises a signal source; a signal injection circuit; and an oscillator circuit. The low-power consumption frequency divider circuit according to the present invention mainly uses the configuration of current reused circuit to form the common current path for reducing the power loss in the disclosed frequency divider circuit.Type: GrantFiled: November 30, 2006Date of Patent: November 4, 2008Assignee: National Taiwan University of Science & TechnologyInventors: Sheng Lyang Jang, Yun Hsueh Chuang
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Publication number: 20080231379Abstract: An injection locked frequency divider includes a ring oscillator, a first injection unit and a second injection unit. The ring oscillator includes a first delay cell and a second delay cell each including differential input terminals and differential output terminals. The differential input terminals and the differential output terminals of the first delay cell are respectively coupled to the differential output terminals and the differential input terminals of the second delay cell. The first injection unit connected between the differential output terminals of the first delay cell receives and injects a first injection signal to the differential output terminals of the first delay cell. The second injection unit connected between the differential output terminals of the second delay cell receives and injects a second injection signal to the differential output terminals of the second delay cell.Type: ApplicationFiled: August 21, 2007Publication date: September 25, 2008Applicant: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Chun-Chieh Chao, Yun-Hsueh Chuang, Shao-Hwa Lee
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Publication number: 20080197894Abstract: An injection locked frequency divider includes a signal injection unit, a Hartley voltage controlled oscillator and a biasing unit. The signal injection unit and the biasing unit output an injection signal to the Hartley voltage controlled oscillator to bias the Hartley voltage controlled oscillator. The Hartley voltage controlled oscillator, which includes a first transistor, a second transistor and a LC tank, receives the injection signal and outputs a differential output signal through a first output terminal and a second output terminal. First terminals of the first and second transistors are respectively coupled to the first and second output terminals, and second terminals of the first and second transistors are coupled to a first node. The LC tank decides a resonant frequency of the Hartley voltage controlled oscillator and serves as a positive feedback circuit for the first and second transistors.Type: ApplicationFiled: August 21, 2007Publication date: August 21, 2008Applicant: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Shao-Hwa Lee
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Publication number: 20080129399Abstract: The present invention discloses a low power consumption frequency divider circuit. It mainly comprises a signal source; a signal injection circuit; and an oscillator circuit. The low-power consumption frequency divider circuit according to the present invention mainly uses the configuration of current reused circuit to form the common current path for reducing the power loss in the disclosed frequency divider circuit.Type: ApplicationFiled: November 30, 2006Publication date: June 5, 2008Inventors: Sheng Lyang Jang, Yun Hsueh Chuang
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Publication number: 20080111644Abstract: A voltage control oscillator (VCO) includes a VCO circuit and a back-gate coupling circuit, wherein the VCO circuit includes at least a first transistor, a second transistor and a resonant cavity formed by an inductor and a capacitor. The back-gate coupling circuit is formed by a plurality of capacitors and a plurality of resistors. In the embodiments of the present invention, the capacitors are coupled to the back-gate terminals of the first transistor and the second transistor, so as to reduce the power consumption and the phase noise of the VCO.Type: ApplicationFiled: February 5, 2007Publication date: May 15, 2008Applicant: National Taiwan University of Science and TechnoloyInventors: Sheng-Lyang Jang, Shao-Hua Lee, Yun-Hsueh Chuang, Chung-Ching Chiu
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Publication number: 20080106343Abstract: A multi-phase voltage-control oscillator including a first voltage-control oscillator circuit and a second voltage-control oscillator circuit is provided. The first voltage-control oscillator circuit includes a first LC tank and a first inductor assembly unit. The second voltage-control oscillator circuit includes a second LC tank and a second inductor assembly unit. A mutual inductance effect is generated between the inductors of the first voltage-control oscillator and the inductors of the second voltage-control oscillator.Type: ApplicationFiled: December 28, 2006Publication date: May 8, 2008Inventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Ren-Hong Yen, Shao-Hua Lee
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Publication number: 20080074199Abstract: An injection-locked frequency divider is provided. The injection-locked frequency divider includes a variable reactance unit, a signal injection unit, a first switch, a second switch, a first transformer, and a second transformer. The variable reactance unit, the first switch, the second switch, the first transformer, and the second transformer form a transformer-based LC-tank oscillator. The signal injection unit receives an injection signal. When the injection-locked frequency divider is in a locked state, the transformer-based LC-tank oscillator outputs a frequency division signal. Employing the feedback action of the first transformer and the second transformer, the present invention not only has a wide locking range but also promotes the realization of the low operating voltage.Type: ApplicationFiled: November 19, 2006Publication date: March 27, 2008Applicant: National Taiwan University of Science and TechnologyInventors: Sheng-Lyang Jang, Yun-Hsueh Chuang, Ren-Hong Yen, Shao-Hwa Lee