Patents by Inventor Xiaoying Yu
Xiaoying Yu 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: 10199939Abstract: A multi-phase switching power converter includes a panic mode detector that triggers the activation of each phase in an open-loop mode of operation in which an open-loop duty cycle is used that is greater than a closed-loop duty cycle used during closed-loop operation for the active phases.Type: GrantFiled: July 16, 2018Date of Patent: February 5, 2019Assignee: DIALOG SEMICONDUCTOR (UK) LIMITEDInventors: Kevin Yi Cheng Chang, James Doyle, Qing Li, Xiaoying Yu, Ibiyemi Omole, Jonathon Stiff, Erik Mentze, Aysel Yildiz
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Patent number: 7781983Abstract: A circuit for controlling LEDs is described. The circuit includes a negative feedback closed-loop circuit provided to sense only the voltage on an LED. Any change in the voltage is caused to be corrected by the negative feedback closed-loop circuit in conjunction with a current source.Type: GrantFiled: July 20, 2007Date of Patent: August 24, 2010Assignees: Vimicro Corporation, Wuxi Vimicro CorporationInventors: Jane Xiaoying Yu, Wei Bing Jing
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Patent number: 7728577Abstract: Techniques pertaining to device and method for controlling an analog signal are disclosed. Using a single connection (e.g., a connector or a pin) without an external resistive element (e.g., a resistor), an analog output is digitally controlled and produced. In one embodiment, a precisely controlled current is generated from coded data. A control unit is designed to control a working mode based on an input signal from the connection. The working mode includes a default mode, a programmable mode, a testing mode and a shutdown mode. Under the programmable mode, a user determines a signal coupled in from the connection as desired, and a code unit codes the signal in accordance with a predefined protocol. The code unit then sends the coded data to a decode unit. The decode unit is designed to generate or control the current by the decoded data.Type: GrantFiled: July 14, 2007Date of Patent: June 1, 2010Assignee: Vimicro CorporationInventors: Jane Xiaoying Yu, Baohong Cheng
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Patent number: 7683680Abstract: A phase comparison of timing signals is made by combinational circuitry which receives the timing signals and a window signal, the window signal identifying edges of the timing signals to be compared. The comparison may result in a charge pumped output which can be fed back to control the phase of one of the timing signals. The phase comparator and charge pump circuit can be included in a multiplier circuitry in which the phase of an input signal is directly compared to the phase of an edge of the multiplied signal.Type: GrantFiled: August 30, 2005Date of Patent: March 23, 2010Assignee: Rambus, Inc.Inventors: William J. Dally, Ramin Farjad-Rad, Teva J. Stone, Xiaoying Yu, John W. Poulton
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Publication number: 20080238398Abstract: Techniques pertaining to device and method for controlling an analog signal are disclosed. Using a single connection (e.g., a connector or a pin) without an external resistive element (e.g., a resistor), an analog output is digitally controlled and produced. According to one aspect of the present invention, a precisely controlled current is generated from a coded data that represents. A control unit is designed to control a working mode based on an input signal from the connection. In one embodiment, the working mode includes a default mode, a programmable mode, a testing mode and a shutdown mode. Under the programmable mode, a user determines a signal coupled in from the connection as desired, and a code unit codes the signal in accordance with a predefined protocol. The code unit then sends the coded data to a decode unit.Type: ApplicationFiled: July 14, 2007Publication date: October 2, 2008Inventors: Xiaoying YU, Baohong Cheng
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Patent number: 7109804Abstract: A relaxation oscillator for generating an oscillator output signal having a predetermined frequency. The relaxation oscillator includes an interleaved charge pump for providing a restoring charge to an integrator in response to at least one charge pump control signal. The relaxation oscillator further includes an integrator having an integrator input connected to the current summing node. The integrator is adapted to produce an integrator output signal having the predetermined frequency at an integrator output. A comparator having an input connected to the integrator output is adapted to generate the oscillator output signal having the predetermined frequency in response to the integrator output signal.Type: GrantFiled: April 27, 2004Date of Patent: September 19, 2006Assignee: Maxim Integrated Products, Inc.Inventors: Urs H. Mader, Yvonne Ko, Franco Cocetta, Jeff Kotowski, Xiaoying Yu
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Publication number: 20060082399Abstract: A phase comparison of timing signals is made by combinational circuitry which receives the timing signals and a window signal, the window signal identifying edges of the timing signals to be compared. The comparison may result in a charge pumped output which can be fed back to control the phase of one of the timing signals. The phase comparator and charge pump circuit can be included in a multiplier circuitry in which the phase of an input signal is directly compared to the phase of an edge of the multiplied signal.Type: ApplicationFiled: August 30, 2005Publication date: April 20, 2006Applicant: Rambus, Inc.Inventors: William Dally, Ramin Farjad-Rad, Teva Stone, Xiaoying Yu, John Poulton
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Publication number: 20050237118Abstract: A relaxation oscillator for generating an oscillator output signal having a predetermined frequency. The relaxation oscillator includes an interleaved charge pump for providing a restoring charge to an integrator in response to at least one charge pump control signal. The relaxation oscillator further includes an integrator having an integrator input connected to the current summing node. The integrator is adapted to produce an integrator output signal having the predetermined frequency at an integrator output. A comparator having an input connected to the integrator output is adapted to generate the oscillator output signal having the predetermined frequency in response to the integrator output signal.Type: ApplicationFiled: April 27, 2004Publication date: October 27, 2005Inventors: Urs Mader, Yvonne Ko, Franco Cocetta, Jeff Kotowski, Xiaoying Yu
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Patent number: 6937073Abstract: A phase comparison of timing signals is made by combinational circuitry which receives the timing signals and a window signal, the window signal identifying edges of the timing signals to be compared. The comparison may result in a charge pumped output which can be fed back to control the phase of one of the timing signals. The phase comparator and charge pump circuit can be included in a multiplier circuitry in which the phase of an input signal is directly compared to the phase of an edge of the multiplied signal.Type: GrantFiled: May 4, 2001Date of Patent: August 30, 2005Assignee: Rambus Inc.Inventors: William J. Dally, Ramin Farjad-Rad, Teva J. Stone, Xiaoying Yu, John W. Poulton
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Patent number: 6897575Abstract: A device for converting wind energy into electrical energy for powering a vehicle, the device including a wind turbine positioned on the vehicle and a generator positioned within the vehicle and connected between the wind turbine and systems of the vehicle. When the vehicle is in motion, wind impinges on the wind turbine and causes the wind turbine to rotate. The generator converts rotational energy of the wind turbine into electrical energy. The electrical energy is provided to power the systems of the vehicle and the batteries of the vehicle are recharged.Type: GrantFiled: April 16, 2003Date of Patent: May 24, 2005Inventor: Xiaoying Yu
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Patent number: 6476656Abstract: The timing circuit includes at least one delay element and its supply voltage is obtained from an active current source. The current source is a current mirror which is driven by a differential amplifier. The differential amplifier compares a voltage on the delay element supply line to a voltage on a current control node connected to a voltage controlled current source. An RC compensating circuit may be coupled to the current control node.Type: GrantFiled: August 9, 2001Date of Patent: November 5, 2002Assignee: Velio Communications, Inc.Inventors: William J. Dally, Ramin Farjad-Rad, Teva J. Stone, Xiaoying Yu, John W. Poulton
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Publication number: 20010054925Abstract: The timing circuit includes at least one delay element and its supply voltage is obtained from an active current source. The current source is a current mirror which is driven by a differential amplifier. The differential amplifier compares a voltage on the delay element supply line to a voltage on a current control node connected to a voltage controlled current source. An RC compensating circuit may be coupled to the current control node.Type: ApplicationFiled: August 9, 2001Publication date: December 27, 2001Applicant: Velio Communications, Inc.Inventors: William J. Dally, Ramin Farjad-Rad, Teva J. Stone, Xiaoying Yu, John W. Poulton
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Patent number: 6316987Abstract: The timing circuit includes at least one delay element and its supply voltage is obtained from an active current source. The current source is a current mirror which is driven by a differential amplifier. The differential amplifier compares a voltage on the delay clement supply line to a voltage on a current control node connected to a voltage controlled current source. An RC compensating circuit may be coupled to the current control node.Type: GrantFiled: December 1, 1999Date of Patent: November 13, 2001Assignee: Velio Communications, Inc.Inventors: William J. Dally, Ramin Farjad-Rad, Teva J. Stone, Xiaoying Yu, John W. Poulton
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Publication number: 20010015663Abstract: A phase comparison of timing signals is made by combinational circuitry which receives the timing signals and a window signal, the window signal identifying edges of the timing signals to be compared. The comparison may result in a charge pumped output which can be fed back to control the phase of one of the timing signals. The phase comparator and charge pump circuit can be included in a multiplier circuitry in which the phase of an input signal is directly compared to the phase of an edge of the multiplied signal.Type: ApplicationFiled: May 4, 2001Publication date: August 23, 2001Applicant: Velio Communications, Inc.Inventors: William J. Dally, Ramin Farjad-Rad, Teva J. Stone, Xiaoying Yu, John W. Poulton
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Patent number: 6275072Abstract: A phase comparison of timing signals is made by combinational circuitry which receives the timing signals and a window signal, the window signal identifying edges of the timing signals to be compared. The comparison may result in a charge pumped output which can be fed back to control the phase of one of the timing signals. The phase comparator and charge pump circuit can be included in a multiplier circuitry in which the phase of an input signal is directly compared to the phase of an edge of the multiplied signal.Type: GrantFiled: October 7, 1999Date of Patent: August 14, 2001Assignee: Velio Communications, Inc.Inventors: William J. Dally, Ramin Farjad-Rad, Teva J. Stone, Xiaoying Yu, John W. Poulton