Patents by Inventor Wingo Cheong
Wingo Cheong 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: 11909255Abstract: In one embodiment, a battery backup unit (BBU) cut-off and recharge circuit includes: a first transistor, a power entry connection connected to a main power supply, where power from the power entry connection flows to application circuits for an electronic device, and the first transistor is positioned between a BBU and the power entry connection, and a microcontroller, where the microcontroller is operative to: detect a loss of power from the main power supply, turn on the first transistor to enable the BBU to discharge through the power entry connection to application circuits, detect a status of charge (SOC) for the BBU, and upon detecting that the SOC is under a predefined threshold, set the BBU cut-off and recharge circuit to a lockdown state by turning off the first transistor.Type: GrantFiled: March 24, 2022Date of Patent: February 20, 2024Assignee: CISCO TECHNOLOGY, INC.Inventors: Xiqun Zhu, Sung Kee Baek, Wingo Cheong, Steven Anthony Granzella, Joel Goergen, Charles Calvin Byers
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Publication number: 20220216712Abstract: In one embodiment, a battery backup unit (BBU) cut-off and recharge circuit includes: a first transistor, a power entry connection connected to a main power supply, where power from the power entry connection flows to application circuits for an electronic device, and the first transistor is positioned between a BBU and the power entry connection, and a microcontroller, where the microcontroller is operative to: detect a loss of power from the main power supply, turn on the first transistor to enable the BBU to discharge through the power entry connection to application circuits, detect a status of charge (SOC) for the BBU, and upon detecting that the SOC is under a predefined threshold, set the BBU cut-off and recharge circuit to a lockdown state by turning off the first transistor.Type: ApplicationFiled: March 24, 2022Publication date: July 7, 2022Inventors: Xiqun ZHU, Sung Kee BAEK, Wingo CHEONG, Steven Anthony GRANZELLA, Joel GOERGEN, Charles Calvin BYERS
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Patent number: 11342762Abstract: In one embodiment, a battery backup unit (BBU) cut-off and recharge circuit includes: a first transistor, a power entry connection connected to a main power supply, where power from the power entry connection flows to application circuits for an electronic device, and the first transistor is positioned between a BBU and the power entry connection, and a microcontroller, where the microcontroller is operative to: detect a loss of power from the main power supply, turn on the first transistor to enable the BBU to discharge through the power entry connection to application circuits, detect a status of charge (SOC) for the BBU, and upon detecting that the SOC is under a predefined threshold, set the BBU cut-off and recharge circuit to a lockdown state by turning off the first transistor.Type: GrantFiled: November 13, 2020Date of Patent: May 24, 2022Assignee: CISCO TECHNOLOGY, INC.Inventors: Xiqun Zhu, Sung Kee Baek, Wingo Cheong, Steven Anthony Granzella, Joel Goergen, Charles Calvin Byers
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Publication number: 20210066936Abstract: In one embodiment, a battery backup unit (BBU) cut-off and recharge circuit includes: a first transistor, a power entry connection connected to a main power supply, where power from the power entry connection flows to application circuits for an electronic device, and the first transistor is positioned between a BBU and the power entry connection, and a microcontroller, where the microcontroller is operative to: detect a loss of power from the main power supply, turn on the first transistor to enable the BBU to discharge through the power entry connection to application circuits, detect a status of charge (SOC) for the BBU, and upon detecting that the SOC is under a predefined threshold, set the BBU cut-off and recharge circuit to a lockdown state by turning off the first transistor.Type: ApplicationFiled: November 13, 2020Publication date: March 4, 2021Inventors: Xiqun ZHU, Sung Kee BAEK, Wingo CHEONG, Steven Anthony GRANZELLA, Joel GOERGEN, Charles Calvin BYERS
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Patent number: 10868431Abstract: In one embodiment, a battery backup unit (BBU) cut-off and recharge circuit includes: a first transistor, a power entry connection connected to a main power supply, where power from the power entry connection flows to application circuits for an electronic device, and the first transistor is positioned between a BBU and the power entry connection, and a microcontroller, where the microcontroller is operative to: detect a loss of power from the main power supply, turn on the first transistor to enable the BBU to discharge through the power entry connection to application circuits, detect a status of charge (SOC) for the BBU, and upon detecting that the SOC is under a predefined threshold, set the BBU cut-off and recharge circuit to a lockdown state by turning off the first transistor.Type: GrantFiled: January 16, 2018Date of Patent: December 15, 2020Assignee: Cisco Technology, Inc.Inventors: Xiqun Zhu, Sung Kee Baek, Wingo Cheong, Steven Anthony Granzella, Joel Goergen, Charles Calvin Byers
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Publication number: 20190222035Abstract: In one embodiment, a battery backup unit (BBU) cut-off and recharge circuit includes: a first transistor, a power entry connection connected to a main power supply, where power from the power entry connection flows to application circuits for an electronic device, and the first transistor is positioned between a BBU and the power entry connection, and a microcontroller, where the microcontroller is operative to: detect a loss of power from the main power supply, turn on the first transistor to enable the BBU to discharge through the power entry connection to application circuits, detect a status of charge (SOC) for the BBU, and upon detecting that the SOC is under a predefined threshold, set the BBU cut-off and recharge circuit to a lockdown state by turning off the first transistor.Type: ApplicationFiled: January 16, 2018Publication date: July 18, 2019Inventors: Xiqun Zhu, Sung Kee Baek, Wingo Cheong, Steven Anthony Granzella, Joel Goergen, Charles Calvin Byers
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Publication number: 20100020486Abstract: An electronic system includes a chassis defining a substantially plane-shaped cavity. The chassis is arranged to contain an air stream (e.g., provided by a cooling subsystem) which flows from an air intake side of the chassis to an air exhaust side of the chassis through the substantially plane-shaped cavity. The air intake side of the chassis is opposite the air exhaust side of the chassis. The electronic system further includes a jacket circuit board disposed within the plane-shaped cavity, and a set of pluggable electronic modules. The jacket circuit board is oriented within the plane-shaped cavity to receive cooling from the air stream. Each pluggable electronic module is arranged to (i) electronically connect to the jacket circuit board through a front of the chassis and (ii) define a supplemental ventilation port through which air passes to augment the air stream.Type: ApplicationFiled: July 23, 2008Publication date: January 28, 2010Applicant: CISCO TECHNOLOGY, INC.Inventors: Susheela N. Narasimhan, Hang Tran, Branimir Tasic, John Borg, Wingo Cheong, Nguyen Nguyen
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Patent number: 7643290Abstract: An electronic system includes a chassis defining a substantially plane-shaped cavity. The chassis is arranged to contain an air stream (e.g., provided by a cooling subsystem) which flows from an air intake side of the chassis to an air exhaust side of the chassis through the substantially plane-shaped cavity. The air intake side of the chassis is opposite the air exhaust side of the chassis. The electronic system further includes a jacket circuit board disposed within the plane-shaped cavity, and a set of pluggable electronic modules. The jacket circuit board is oriented within the plane-shaped cavity to receive cooling from the air stream. Each pluggable electronic module is arranged to (i) electronically connect to the jacket circuit board through a front of the chassis and (ii) define a supplemental ventilation port through which air passes to augment the air stream.Type: GrantFiled: July 23, 2008Date of Patent: January 5, 2010Assignee: Cisco Technology, Inc.Inventors: Susheela N. Narasimhan, Hang Tran, Branimir Tasic, John Borg, Wingo Cheong, Nguyen Nguyen