Patents by Inventor Shengyuan Li
Shengyuan Li 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: 10707564Abstract: The present disclosure relates to the technical field of unmanned aerial vehicles, and in particular, to an unmanned aerial vehicle. The unmanned aerial vehicle includes at least a first dual-polarized antenna and a second dual-polarized antenna, wherein the first dual-polarized antenna is provided in a horizontal direction of the unmanned aerial vehicle, and the second dual-polarized antenna is provided in a vertical direction of the unmanned aerial vehicle. As the antenna designed in this structure is applied to the unmanned aerial vehicle of the present application, a weak signal in a vertical polarization direction is compensated by a strong electromagnetic signal in a horizontal polarization direction, and therefore an image transmission height of the unmanned aerial vehicle is increased in the vertical direction.Type: GrantFiled: September 26, 2018Date of Patent: July 7, 2020Assignee: AUTEL ROBOTICS CO., LTD.Inventors: Zhuanpeng Cheng, Shengyuan Li
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Patent number: 10418946Abstract: An envelope tracking device includes circuitry that senses a current of an input state of the envelope tracking device. The circuitry also senses an output voltage of the envelope tracking device, and turns on at least one of a first and a second output switches to generate an output current based on at least one of the sensed current and the sensed voltage.Type: GrantFiled: January 8, 2018Date of Patent: September 17, 2019Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITEDInventors: Xiaofeng Lin, Leon Samuel Wang, Shengyuan Li, Junjie Lu, Xicheng Jiang
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Patent number: 10326363Abstract: A device, a circuit, and a method for current bypass are provided. The device includes circuitry detects an overload condition at a switching regulator output, enables a current bypass path including a linear current source in response to detecting the overload condition, and digitizes a difference between a load current and a switching regulator output current. The linear current source generates an active current assist signal based on the digitized difference between the load current and the switching regulator output current.Type: GrantFiled: November 16, 2017Date of Patent: June 18, 2019Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITEDInventors: Shengyuan Li, Junjie Lu, Cheng Huang, Xiaofeng Lin, Leon Samuel Wang, Xicheng Jiang
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Publication number: 20190036203Abstract: The present disclosure relates to the technical field of unmanned aerial vehicles, and in particular, to an unmanned aerial vehicle. The unmanned aerial vehicle includes at least a first dual-polarized antenna and a second dual-polarized antenna, wherein the first dual-polarized antenna is provided in a horizontal direction of the unmanned aerial vehicle, and the second dual-polarized antenna is provided in a vertical direction of the unmanned aerial vehicle. As the antenna designed in this structure is applied to the unmanned aerial vehicle of the present application, a weak signal in a vertical polarization direction is compensated by a strong electromagnetic signal in a horizontal polarization direction, and therefore an image transmission height of the unmanned aerial vehicle is increased in the vertical direction.Type: ApplicationFiled: September 26, 2018Publication date: January 31, 2019Inventors: Zhuanpeng CHENG, Shengyuan LI
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Publication number: 20180198274Abstract: A device, a circuit, and a method for current bypass are provided. The device includes circuitry detects an overload condition at a switching regulator output, enables a current bypass path including a linear current source in response to detecting the overload condition, and digitizes a difference between a load current and a switching regulator output current. The linear current source generates an active current assist signal based on the digitized difference between the load current and the switching regulator output current.Type: ApplicationFiled: November 16, 2017Publication date: July 12, 2018Applicant: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Shengyuan LI, Junjie LU, Cheng HUANG, Xiaofeng LIN, Leon Samuel WANG, Xicheng JIANG
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Publication number: 20180198415Abstract: An envelope tracking device includes circuitry that senses a current of an input state of the envelope tracking device. The circuitry also senses an output voltage of the envelope tracking device, and turns on at least one of a first and a second output switches to generate an output current based on at least one of the sensed current and the sensed voltage.Type: ApplicationFiled: January 8, 2018Publication date: July 12, 2018Applicant: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Xiaofeng LIN, Leon Samuel WANG, Shengyuan LI, Junjie LU, Xicheng JIANG
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Patent number: 9496873Abstract: In one embodiment, a method for increasing speed of a differential input pair. The method comprises applying a first boost current to a first input of the differential input pair during a transition of a first signal applied to the first input; storing the first boost current; ending the application of the first boost current in response to the stored first boost current exceeding a first threshold; applying a second boost current to a second input of the differential input pair during a transition of a second signal applied to the second input; storing the second boost current; and ending the application of the second boost current in response to the stored second boost current exceeding a second threshold.Type: GrantFiled: August 4, 2014Date of Patent: November 15, 2016Assignee: QUALCOMM INCORPORATEDInventors: Shengyuan Li, Iulian Mirea
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Patent number: 9455712Abstract: In one embodiment, a circuit comprises a phase interpolator that converts a single-ended input to a pair of symmetric differential signals within a first voltage domain. The circuit further comprises a comparator that converts the symmetric differential signals into single-ended output in a second different voltage domain. In one embodiment, the single ended output of the comparator is configured to be coupled to drive a switching driver in a switching regulator. In one embodiment, the interpolator comprises a first inverter, a second inverter, and a third inverter connected in series. The interpolator further comprises a first resistor and a second resistor connected in series. The second inverter provides a first output signal. Outputs of the first inverter and the third inverter are connected by the series connected resistors. A node between the resistors provides a second output signal. The first and second output signals are inverted and symmetric.Type: GrantFiled: August 1, 2014Date of Patent: September 27, 2016Assignee: QUALCOMM INCORPORATEDInventor: Shengyuan Li
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Publication number: 20160036313Abstract: The present disclosure includes programmable snubber circuits and methods. In one embodiment, a circuit is configured between first and second power supply terminals. A programmable snubber circuit may be configured between the first and second power supplies to reduce ringing on the power supplies. In one embodiment, the circuit is a switching regulator and the power supply terminals are internal power supply terminals. The snubber circuit may be programmed to reduce ringing caused by switching currents through parasitic inductances in a package.Type: ApplicationFiled: August 4, 2014Publication date: February 4, 2016Inventors: Shengyuan Li, Chunlei Shi, Loc Nguyen
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Publication number: 20160036444Abstract: In one embodiment, a circuit comprises a phase interpolator that converts a single-ended input to a pair of symmetric differential signals within a first voltage domain. The circuit further comprises a comparator that converts the symmetric differential signals into single-ended output in a second different voltage domain. In one embodiment, the single ended output of the comparator is configured to be coupled to drive a switching driver in a switching regulator. In one embodiment, the interpolator comprises a first inverter, a second inverter, and a third inverter connected in series. The interpolator further comprises a first resistor and a second resistor connected in series. The second inverter provides a first output signal. Outputs of the first inverter and the third inverter are connected by the series connected resistors. A node between the resistors provides a second output signal. The first and second output signals are inverted and symmetric.Type: ApplicationFiled: August 1, 2014Publication date: February 4, 2016Inventor: Shengyuan Li
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Publication number: 20160036443Abstract: In one embodiment, a method for increasing speed of a differential input pair, The method comprises applying a first boost current to a first input of the differential input pair during a transition of a first signal applied to the first input; storing the first boost current; ending the application of the first boost current in response to the stored first boost current exceeding a first threshold; applying a second boost current to a second input of the differential input pair during a transition of a second signal applied to the second input; storing the second boost current; and ending the application of the second boost current in response to the stored second boost current exceeding a second threshold.Type: ApplicationFiled: August 4, 2014Publication date: February 4, 2016Inventors: Shengyuan Li, Iulian Mirea
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Patent number: 9236789Abstract: The present disclosure includes programmable snubber circuits and methods. In one embodiment, a circuit is configured between first and second power supply terminals. A programmable snubber circuit may be configured between the first and second power supplies to reduce ringing on the power supplies. In one embodiment, the circuit is a switching regulator and the power supply terminals are internal power supply terminals. The snubber circuit may be programmed to reduce ringing caused by switching currents through parasitic inductances in a package.Type: GrantFiled: August 4, 2014Date of Patent: January 12, 2016Assignee: QUALCOMM IncorporatedInventors: Shengyuan Li, Chunlei Shi, Loc Nguyen
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Patent number: 8841943Abstract: Various apparatuses, methods and systems for damping a current driver are disclosed herein. For example, some embodiments provide an apparatus for supplying current, including an output transistor connected between a voltage supply and a current output, and an active clamp connected between the current output and a current sink. The active clamp is adapted to connect the current output to the current sink when a voltage at the current output reaches a predetermined state relative to a voltage at a control input of the output transistor.Type: GrantFiled: May 27, 2011Date of Patent: September 23, 2014Assignee: Texas Instruments IncorporatedInventors: Shengyuan Li, Douglas Warren Dean, Indumini Ranmuthu
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Patent number: 8699534Abstract: An optical disk drive system associated with a laser diode is described. The optical disk drive system comprises a current generator for receiving input signals; a current switch coupled to receive timing signals; a current driver coupled to receive output signals from the current switch and the current generator, the current driver further comprising a driver with wave shape control selected from the group consisting of a laser diode read driver and a laser diode write driver, wherein the driver with shape control is operative for transmitting at least one output signal that is a scaled version of at least one of the output signals received from the current generator, wherein the current driver is operative for transmitting at least one output signal driving the laser diode.Type: GrantFiled: August 9, 2013Date of Patent: April 15, 2014Assignee: Texas Instruments IncorporatedInventors: Douglas Warren Dean, Shengyuan Li, Indumini W. Ranmuthu
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Publication number: 20130329759Abstract: An optical disk drive system associated with a laser diode is described. The optical disk drive system comprises a current generator for receiving input signals; a current switch coupled to receive timing signals; a current driver coupled to receive output signals from the current switch and the current generator, the current driver further comprising a driver with wave shape control selected from the group consisting of a laser diode read driver and a laser diode write driver, wherein the driver with shape control is operative for transmitting at least one output signal that is a scaled version of at least one of the output signals received from the current generator, wherein the current driver is operative for transmitting at least one output signal driving the laser diode.Type: ApplicationFiled: August 9, 2013Publication date: December 12, 2013Applicant: Texas Instruments IncorporatedInventors: Douglas Warren Dean, Shengyuan Li, Indumini W. Ranmuthu
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Patent number: 8537868Abstract: An optical disk drive system associated with a laser diode is described. The optical disk drive system comprises a current generator for receiving input signals; a current switch coupled to receive timing signals; a current driver coupled to receive output signals from the current switch and the current generator, the current driver further comprising a driver with wave shape control selected from the group consisting of a laser diode read driver and a laser diode write driver, wherein the driver with shape control is operative for transmitting at least one output signal that is a scaled version of at least one of the output signals received from the current generator, wherein the current driver is operative for transmitting at least one output signal driving the laser diode.Type: GrantFiled: October 29, 2012Date of Patent: September 17, 2013Assignee: Texas Instruments IncorporatedInventors: Douglas Warren Dean, Shengyuan Li, Indumini Ranmuthu
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Patent number: 8437232Abstract: A high frequency modulator is described. It comprises: a first converter for receiving a constant current signal and transmitting a first converted signal; an adder coupled the first converter and operative for transmitting a summed signal in response to receiving the first converted signal and selectively receiving a triangular signal; a first oscillator coupled to the adder for receiving the summed signal, the first oscillator operative for transmitting a time varying current signal; a second converter coupled to the first oscillator for receiving the time varying current signal and operative for transmitting a second converted signal; and an output device selectively coupled to the second converter and operative for transmitting an output signal in response to receiving either the second converted signal or an offset signal.Type: GrantFiled: December 8, 2009Date of Patent: May 7, 2013Assignee: Texas Instruments IncorporatedInventors: Akihiko Doi, Shengyuan Li, Indumini Ranmuthu
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Patent number: 8325583Abstract: An optical disk drive system associated with a laser diode is described. The optical disk drive system comprises a current generator for receiving input signals; a current switch coupled to receive timing signals; a current driver coupled to receive output signals from the current switch and the current generator, the current driver further comprising a driver with wave shape control selected from the group consisting of a laser diode read driver and a laser diode write driver, wherein the driver with shape control is operative for transmitting at least one output signal that is a scaled version of at least one of the output signals received from the current generator, wherein the current driver is operative for transmitting at least one output signal driving the laser diode.Type: GrantFiled: April 12, 2010Date of Patent: December 4, 2012Assignee: Texas Instruments IncorporatedInventors: Douglas Warren Dean, Shengyuan Li, Indumini W. Ranmuthu
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Publication number: 20120300606Abstract: Various apparatuses, methods and systems for damping a current driver are disclosed herein. For example, some embodiments provide an apparatus for supplying current, including an output transistor connected between a voltage supply and a current output, and an active clamp connected between the current output and a current sink. The active clamp is adapted to connect the current output to the current sink when a voltage at the current output reaches a predetermined state relative to a voltage at a control input of the output transistor.Type: ApplicationFiled: May 27, 2011Publication date: November 29, 2012Inventors: Shengyuan Li, Douglas Warren Dean, Indumini Ranmuthu
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Patent number: D698054Type: GrantFiled: March 30, 2012Date of Patent: January 21, 2014Assignee: Shenzhen Bang-Bell Electronics Co., Ltd.Inventors: Lin He, Jian Li, Shengyuan Li