Patents by Inventor Chiu Keung TANG
Chiu Keung TANG 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: 12009811Abstract: A regeneration circuit includes a first inverting circuit, a second inverting circuit, a first transistor coupled to an input of the second inverting circuit, and a second transistor coupled to an input of the first inverting circuit. The regeneration circuit also includes a third transistor including a gate coupled to a gate of the first transistor, a first switch configured to couple the third transistor to the input of the second inverting circuit based on a voltage of the first inverting circuit, a fourth transistor including a gate coupled to a gate of the second transistor, and a second switch configured to couple the fourth transistor to the input of the first inverting circuit based on a voltage of the second inverting circuit.Type: GrantFiled: June 1, 2023Date of Patent: June 11, 2024Assignee: QUALCOMM INCORPORATEDInventors: Chiu Keung Tang, Zhiqin Chen
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Publication number: 20230396247Abstract: A regeneration circuit includes a first inverting circuit, a second inverting circuit, a first transistor coupled to an input of the second inverting circuit, and a second transistor coupled to an input of the first inverting circuit. The regeneration circuit also includes a third transistor including a gate coupled to a gate of the first transistor, a first switch configured to couple the third transistor to the input of the second inverting circuit based on a voltage of the first inverting circuit, a fourth transistor including a gate coupled to a gate of the second transistor, and a second switch configured to couple the fourth transistor to the input of the first inverting circuit based on a voltage of the second inverting circuit.Type: ApplicationFiled: June 1, 2023Publication date: December 7, 2023Inventors: Chiu Keung TANG, Zhiqin CHEN
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Patent number: 11711077Abstract: A regeneration circuit includes a first inverting circuit and a second inverting circuit. The regeneration circuit also includes a first transistor coupled to an input of the second inverting circuit, and a second transistor coupled to an input of the first inverting circuit, a third transistor and a fourth transistor. A gate of the first transistor and a gate of the fourth transistor are coupled to a first input, and a gate of the second transistor and a gate of the fourth transistor are coupled to a second input. The regeneration circuit further includes a first switch and a second switch. The first switch and the third transistor are coupled in series between a first rail and the first transistor, and the second switch and the fourth transistor are coupled in series between the first rail and the second transistor.Type: GrantFiled: June 2, 2022Date of Patent: July 25, 2023Assignee: QUALCOMM INCORPORATEDInventors: Chiu Keung Tang, Zhiqin Chen
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Patent number: 11329639Abstract: A novel delay circuit for quadrature clock generation with insensitivity to process, voltage, temperature (PVT) variations and equal rising/falling edges is disclosed. In one implementation, the delay circuit includes a first N-substage having a sinking current source, configured to receive an input signal and to generate a rising edge of an output signal of the delay circuit, wherein the output signal is a delayed version of the input signal. The delay circuit further includes a first P-substage having a sourcing current source, configured to receive the input signal and to generate a falling edge of the output signal, where the sinking current source and the sourcing current source are variable in response to respective ones of a plurality of bias voltages.Type: GrantFiled: March 25, 2021Date of Patent: May 10, 2022Assignee: QUALCOMM INCORPORATEDInventors: Chiu Keung Tang, Zhiqin Chen
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Patent number: 11193961Abstract: Apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc.Type: GrantFiled: May 4, 2020Date of Patent: December 7, 2021Assignee: Intel CorporationInventors: Gerhard Schrom, J. Keith Hodgson, Alexander Lyakhov, Chiu Keung Tang, Narayanan Raghuraman, Narayanan Natarajan
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Publication number: 20200264214Abstract: Described are apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc. In one example, apparatus comprises: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: ApplicationFiled: May 4, 2020Publication date: August 20, 2020Applicant: Intel CorporationInventors: Gerhard SCHROM, J. Keith HODGSON, Alexander LYAKHOV, Chiu Keung TANG, Narayanan RAGHURAMAN, Narayanan NATARAJAN
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Patent number: 10641799Abstract: Apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), and compensator for a voltage regulator (VR), are provided. In one example, an apparatus includes: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: GrantFiled: January 22, 2019Date of Patent: May 5, 2020Assignee: Intel CorporationInventors: Gerhard Schrom, J. Keith Hodgson, Alexander Lyakhov, Chiu Keung Tang, Narayanan Raghuraman, Narayanan Natarajan
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Publication number: 20190154739Abstract: Described are apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc. In one example, apparatus comprises: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: ApplicationFiled: January 22, 2019Publication date: May 23, 2019Applicant: Intel CorporationInventors: Gerhard SCHROM, J. Keith HODGSON, Alexander LYAKHOV, Chiu Keung TANG, Narayanan RAGHURAMAN, Narayanan NATARAJAN
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Patent number: 10191526Abstract: A transmit driver is configured to operate under distinct supply voltage provided at output differential terminals. The transmit driver includes differential input transistors, first and second pairs of over-voltage protection differential transistors, and a current source coupled in series between the output terminals and a lower voltage rail. The transmit driver includes a first bias voltage generator configured to generate a first bias voltage based on the supply voltage across the output differential terminals. The first bias voltage is applied to the control terminals of the first pair of over-voltage protection transistors. The transmit driver includes a second bias generator for generating a second (substantially fixed) bias voltage for the control terminals of the second pair of over-voltage protection transistors. The transmit driver may be configured to operate based on a 3.3V supply voltage provided by an HDMI sink, or based on a 1.8V supply voltage provided by a bridge chip.Type: GrantFiled: November 8, 2016Date of Patent: January 29, 2019Assignee: QUALCOMM IncorporatedInventors: Madjid Hafizi, Chiu Keung Tang
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Patent number: 10184961Abstract: Described are apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc. In one example, apparatus comprises: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: GrantFiled: September 26, 2016Date of Patent: January 22, 2019Assignee: Intel CorporationInventors: Gerhard Schrom, J. Keith Hodgson, Alexander Lyakhov, Chiu Keung Tang, Narayanan Raghuraman, Narayanan Natarajan
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Publication number: 20180129256Abstract: A transmit driver is configured to operate under distinct supply voltage provided at output differential terminals. The transmit driver includes differential input transistors, first and second pairs of over-voltage protection differential transistors, and a current source coupled in series between the output terminals and a lower voltage rail. The transmit driver includes a first bias voltage generator configured to generate a first bias voltage based on the supply voltage across the output differential terminals. The first bias voltage is applied to the control terminals of the first pair of over-voltage protection transistors. The transmit driver includes a second bias generator for generating a second (substantially fixed) bias voltage for the control terminals of the second pair of over-voltage protection transistors. The transmit driver may be configured to operate based on a 3.3V supply voltage provided by an HDMI sink, or based on a 1.8V supply voltage provided by a bridge chip.Type: ApplicationFiled: November 8, 2016Publication date: May 10, 2018Inventors: Madjid Hafizi, Chiu Keung Tang
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Patent number: 9733282Abstract: Apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc. are provided here. An apparatus is provided which comprises: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: GrantFiled: November 17, 2014Date of Patent: August 15, 2017Assignee: Intel CorporationInventors: Gerhard Schrom, J. Keith Hodgson, Alexander Lyakhov, Chiu Keung Tang, Narayanan Raghuraman, Narayanan Natarajan
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Patent number: 9696350Abstract: Described is an apparatus having a non-linear control to manage power supply droop at an output of a voltage regulator. The apparatus comprises: a first inductor for coupling to a load; a capacitor, coupled to the first inductor, and for coupling to the load; a first high-side switch couple to the first inductor; a first low-side switch coupled to the first inductor; a bridge controller to control when to turn on and off the first high-side and first low-side switches; and a non-linear control (NLC) unit to monitor output voltage on the load, and to cause the bridge controller to turn on the first high-side switch and turn off the first low-side switch when a voltage droop is detected on the load.Type: GrantFiled: May 31, 2013Date of Patent: July 4, 2017Assignee: Intel CorporationInventors: Edward A. Burton, Gerhard Schrom, Michael W. Rogers, Alexander Lyakhov, Ravi Sankar Vunnam, Jonathan P. Douglas, Fabrice Paillet, J. Keith Hodgson, William Dawson Kesling, Chiu Keung Tang, Narayanan Raghuraman, Narayanan Natarajan, Samie Samaan, George Geannopoulos
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Publication number: 20170030947Abstract: Described are apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc. In one example, apparatus comprises: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: ApplicationFiled: September 26, 2016Publication date: February 2, 2017Inventors: Gerhard SCHROM, J. Keith Hodgson, Alexander Lyakhov, Chiu Keung Tang, Narayanan Raghuraman, Narayanan Natarajan
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Publication number: 20150069995Abstract: Described are apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc. In one example, apparatus comprises: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: ApplicationFiled: November 17, 2014Publication date: March 12, 2015Inventors: Gerhard SCHROM, J. Keith HODGSON, Alexander LYAKHOV, Chiu Keung TANG, Narayanan RAGHURAMAN, Narayanan NATARAJAN
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Patent number: 8890737Abstract: Described are apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc. In one example, an apparatus comprises: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: GrantFiled: June 28, 2013Date of Patent: November 18, 2014Assignee: Intel CorporationInventors: Gerhard Schrom, J. Keith Hodgson, Alexander Lyakhov, Chiu Keung Tang, Narayanan Raghuraman, Narayanan Natarajan
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Publication number: 20140266832Abstract: Described are apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc. In one example, apparatus comprises: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: ApplicationFiled: June 28, 2013Publication date: September 18, 2014Inventors: Gerhard SCHROM, J. Keith HODGSON, Alexander LYAKHOV, Chiu Keung TANG, Narayanan RAGHURAMAN, Narayanan NATARAJAN