Patents by Inventor Jiqing Yang
Jiqing Yang 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: 9614445Abstract: Systems and methods are provided for signal processing. An example error amplifier for processing a reference signal and an input signal associated with a current of a power conversion system includes a first operational amplifier, a second operational amplifier, a first transistor, a second transistor, a current mirror component, a switch, a first resistor and a second resistor. The first operational amplifier includes a first input terminal, a second input terminal and a first output terminal, the first input terminal being configured to receive a reference signal. The first transistor includes a first transistor terminal, a second transistor terminal and a third transistor terminal, the first transistor terminal being configured to receive a first amplified signal from the first output terminal, the third transistor terminal being coupled to the second input terminal.Type: GrantFiled: August 16, 2013Date of Patent: April 4, 2017Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Liqiang Zhu, Jiqing Yang, Yaozhang Chen, Zhuoyan Li, Qiang Luo, Lieyi Fang
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Patent number: 9585222Abstract: Systems and methods for dimming control using TRIAC dimmers are provided. An example apparatus for a power conversion system includes: a process-and-drive component configured to receive an input signal and output a drive signal to a switch to affect a current that flows through a primary winding of a power conversion system. The input signal includes a first pulse associated with a first input period and a second pulse associated with a second input period. The drive signal is associated with a first modulation period for the first input period and a second modulation period for the second input period. The process-and-drive component is further configured to: determine the first modulation period for the first input period; change the drive signal between a first logic level and a second logic level at a modulation frequency during the first modulation period; determine the second modulation period for the second input period.Type: GrantFiled: August 5, 2014Date of Patent: February 28, 2017Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Liqiang Zhu, Jiqing Yang, Zhuoyan Li, Lieyi Fang
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Patent number: 9426850Abstract: System and method are provided for generating a plurality of channel currents. The system includes a channel reference generator configured to receive a first reference current and generate at least a first channel driving current and a second channel driving current, a first channel current divider configured to receive the first channel driving current and generate a first input current, a second input current, and a third input current, a second channel current divider configured to receive the second channel driving current and generate a fourth input current, a fifth input current, and a sixth input current, a first channel driver configured to receive the first input current, the second input current, and the third input current and generate a first channel current, and a second channel driver configured to receive the fourth input current, the fifth input current, and the sixth input current and generate a second channel current.Type: GrantFiled: February 26, 2015Date of Patent: August 23, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jiqing Yang, Meng Li, Liqiang Zhu, Lieyi Fang
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Patent number: 9276571Abstract: System and method are provided for driving a transistor. The system includes a floating-voltage generator, a first driving circuit, and a second driving circuit. The floating-voltage generator is configured to receive a first bias voltage and generate a floating voltage, the floating-voltage generator being further configured to change the floating voltage if the first bias voltage changes and to maintain the floating voltage to be lower than the first bias voltage by a first predetermined value in magnitude. The first driving circuit is configured to receive an input signal, the first bias voltage and the floating voltage. The second driving circuit is configured to receive the input signal, a second bias voltage and a third bias voltage, the first driving circuit and the second driving circuit being configured to generate an output signal to drive a transistor.Type: GrantFiled: December 13, 2013Date of Patent: March 1, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jiqing Yang, Meng Li, Qiang Luo, Lieyi Fang
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Publication number: 20160014861Abstract: Systems and methods for dimming control using TRIAC dimmers are provided. An example apparatus for a power conversion system includes: a process-and-drive component configured to receive an input signal and output a drive signal to a switch to affect a current that flows through a primary winding of a power conversion system. The input signal includes a first pulse associated with a first input period and a second pulse associated with a second input period. The drive signal is associated with a first modulation period for the first input period and a second modulation period for the second input period. The process-and-drive component is further configured to: determine the first modulation period for the first input period; change the drive signal between a first logic level and a second logic level at a modulation frequency during the first modulation period; determine the second modulation period for the second input period.Type: ApplicationFiled: November 4, 2014Publication date: January 14, 2016Inventors: Liqiang Zhu, Jiqing Yang, Zhuoyan Li, Lieyi Fang
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Publication number: 20160014865Abstract: Systems and methods for dimming control using TRIAC dimmers are provided. An example apparatus for a power conversion system includes: a process-and-drive component configured to receive an input signal and output a drive signal to a switch to affect a current that flows through a primary winding of a power conversion system. The input signal includes a first pulse associated with a first input period and a second pulse associated with a second input period. The drive signal is associated with a first modulation period for the first input period and a second modulation period for the second input period. The process-and-drive component is further configured to: determine the first modulation period for the first input period; change the drive signal between a first logic level and a second logic level at a modulation frequency during the first modulation period; determine the second modulation period for the second input period.Type: ApplicationFiled: August 5, 2014Publication date: January 14, 2016Inventors: Liqiang Zhu, Jiqing Yang, Zhuoyan Li, Lieyi Fang
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Publication number: 20150318789Abstract: System and method for regulating a power conversion system. An example system controller for regulating a power conversion system includes a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a primary winding of a power conversion system, a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal, and a third controller terminal associated with a third controller voltage. The first controller voltage is equal to a sum of the third controller voltage and a first voltage difference. The second controller voltage is equal to a sum of the third controller voltage and a second voltage difference.Type: ApplicationFiled: May 20, 2015Publication date: November 5, 2015Inventors: Jiqing Yang, Jun Zhou, Liqiang Zhu, Qiang Luo, Lieyi Fang
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Publication number: 20150237691Abstract: System and method are provided for generating a plurality of channel currents. The system includes a channel reference generator configured to receive a first reference current and generate at least a first channel driving current and a second channel driving current, a first channel current divider configured to receive the first channel driving current and generate a first input current, a second input current, and a third input current, a second channel current divider configured to receive the second channel driving current and generate a fourth input current, a fifth input current, and a sixth input current, a first channel driver configured to receive the first input current, the second input current, and the third input current and generate a first channel current, and a second channel driver configured to receive the fourth input current, the fifth input current, and the sixth input current and generate a second channel current.Type: ApplicationFiled: February 26, 2015Publication date: August 20, 2015Inventors: Jiqing Yang, Meng Li, Liqiang Zhu, Lieyi Fang
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Patent number: 9071151Abstract: System and method for regulating a power conversion system. An example system controller for regulating a power conversion system includes a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a primary winding of a power conversion system, a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal, and a third controller terminal associated with a third controller voltage. The first controller voltage is equal to a sum of the third controller voltage and a first voltage difference. The second controller voltage is equal to a sum of the third controller voltage and a second voltage difference.Type: GrantFiled: January 4, 2013Date of Patent: June 30, 2015Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jiqing Yang, Jun Zhou, Liqiang Zhu, Qiang Luo, Lieyi Fang
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Patent number: 9000681Abstract: System and method are provided for generating a plurality of channel currents. The system includes a channel reference generator configured to receive a first reference current and generate at least a first channel driving current and a second channel driving current, a first channel current divider configured to receive the first channel driving current and generate a first input current, a second input current, and a third input current, a second channel current divider configured to receive the second channel driving current and generate a fourth input current, a fifth input current, and a sixth input current, a first channel driver configured to receive the first input current, the second input current, and the third input current and generate a first channel current, and a second channel driver configured to receive the fourth input current, the fifth input current, and the sixth input current and generate a second channel current.Type: GrantFiled: August 22, 2011Date of Patent: April 7, 2015Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jiqing Yang, Meng Li, Liqiang Zhu, Lieyi Fang
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Publication number: 20150023069Abstract: Systems and methods are provided for signal processing. An example error amplifier for processing a reference signal and an input signal associated with a current of a power conversion system includes a first operational amplifier, a second operational amplifier, a first transistor, a second transistor, a current mirror component, a switch, a first resistor and a second resistor. The first operational amplifier includes a first input terminal, a second input terminal and a first output terminal, the first input terminal being configured to receive a reference signal. The first transistor includes a first transistor terminal, a second transistor terminal and a third transistor terminal, the first transistor terminal being configured to receive a first amplified signal from the first output terminal, the third transistor terminal being coupled to the second input terminal.Type: ApplicationFiled: August 16, 2013Publication date: January 22, 2015Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Liqiang Zhu, Jiqing Yang, Yaozhang Chen, Zhuoyan Li, Qiang Luo, Lieyi Fang
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Publication number: 20140177280Abstract: System and method for regulating a power conversion system. An example system controller for regulating a power conversion system includes a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a primary winding of a power conversion system, a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal, and a third controller terminal associated with a third controller voltage. The first controller voltage is equal to a sum of the third controller voltage and a first voltage difference. The second controller voltage is equal to a sum of the third controller voltage and a second voltage difference.Type: ApplicationFiled: January 4, 2013Publication date: June 26, 2014Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Jiqing Yang, Jun Zhou, Liqiang Zhu, Qiang Luo, Lieyi Fang
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Publication number: 20140103970Abstract: System and method are provided for driving a transistor. The system includes a floating-voltage generator, a first driving circuit, and a second driving circuit. The floating-voltage generator is configured to receive a first bias voltage and generate a floating voltage, the floating-voltage generator being further configured to change the floating voltage if the first bias voltage changes and to maintain the floating voltage to be lower than the first bias voltage by a first predetermined value in magnitude. The first driving circuit is configured to receive an input signal, the first bias voltage and the floating voltage. The second driving circuit is configured to receive the input signal, a second bias voltage and a third bias voltage, the first driving circuit and the second driving circuit being configured to generate an output signal to drive a transistor.Type: ApplicationFiled: December 13, 2013Publication date: April 17, 2014Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Jiqing Yang, Meng Li, Qiang Luo, Lieyi Fang
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Patent number: 8648630Abstract: System and method are provided for driving a transistor. The system includes a floating-voltage generator, a first driving circuit, and a second driving circuit. The floating-voltage generator is configured to receive a first bias voltage and generate a floating voltage, the floating-voltage generator being further configured to change the floating voltage if the first bias voltage changes and to maintain the floating voltage to be lower than the first bias voltage by a first predetermined value in magnitude. The first driving circuit is configured to receive an input signal, the first bias voltage and the floating voltage. The second driving circuit is configured to receive the input signal, a second bias voltage and a third bias voltage, the first driving circuit and the second driving circuit being configured to generate an output signal to drive a transistor.Type: GrantFiled: November 15, 2011Date of Patent: February 11, 2014Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jiqing Yang, Meng Li, Qiang Luo, Lieyi Fang
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Publication number: 20130093474Abstract: System and method are provided for driving a transistor. The system includes a floating-voltage generator, a first driving circuit, and a second driving circuit. The floating-voltage generator is configured to receive a first bias voltage and generate a floating voltage, the floating-voltage generator being further configured to change the floating voltage if the first bias voltage changes and to maintain the floating voltage to be lower than the first bias voltage by a first predetermined value in magnitude. The first driving circuit is configured to receive an input signal, the first bias voltage and the floating voltage. The second driving circuit is configured to receive the input signal, a second bias voltage and a third bias voltage, the first driving circuit and the second driving circuit being configured to generate an output signal to drive a transistor.Type: ApplicationFiled: November 15, 2011Publication date: April 18, 2013Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Jiqing Yang, Meng Li, Qiang Luo, Lieyi Fang
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Publication number: 20130033105Abstract: System and method are provided for generating a plurality of channel currents. The system includes a channel reference generator configured to receive a first reference current and generate at least a first channel driving current and a second channel driving current, a first channel current divider configured to receive the first channel driving current and generate a first input current, a second input current, and a third input current, a second channel current divider configured to receive the second channel driving current and generate a fourth input current, a fifth input current, and a sixth input current, a first channel driver configured to receive the first input current, the second input current, and the third input current and generate a first channel current, and a second channel driver configured to receive the fourth input current, the fifth input current, and the sixth input current and generate a second channel current.Type: ApplicationFiled: August 22, 2011Publication date: February 7, 2013Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Jiqing Yang, Meng Li, Liqiang Zhu, Lieyi Fang