Patents by Inventor Tak Ying Wong
Tak Ying Wong 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: 11543843Abstract: In one embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a loop circuit coupled to the amplifier, where the loop circuit is to receive the comparison signal and provide a regulated voltage to the amplifier as the feedback voltage in a first mode of operation, and in a second mode of operation to provide a predetermined feedback ratio point to the amplifier as the feedback voltage; and an output device coupled to the amplifier. The output device may be configured to receive a supply voltage and the comparison signal and output the regulated voltage at an output node based at least in part on the comparison signal.Type: GrantFiled: April 14, 2021Date of Patent: January 3, 2023Assignee: Silicon Laboratories Inc.Inventors: Hua Beng Chan, Rex Tak Ying Wong, Ricky Setiawan
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Publication number: 20220326725Abstract: In an embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a first loop circuit coupled to the amplifier to receive the comparison signal and output a first feedback voltage for the amplifier to use as the feedback voltage in a first mode of operation; and a second loop circuit coupled to the amplifier. The second loop circuit may be configured to receive the comparison signal and output a second feedback voltage for the amplifier to use as the feedback voltage in a second mode of operation. The second feedback voltage may be greater than the first feedback voltage, and the second loop circuit may output a regulated voltage based on the comparison signal.Type: ApplicationFiled: June 23, 2022Publication date: October 13, 2022Inventors: RICKY SETIAWAN, HUA BENG CHAN, REX TAK YING WONG
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Patent number: 11402860Abstract: In an embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a first loop circuit coupled to the amplifier to receive the comparison signal and output a first feedback voltage for the amplifier to use as the feedback voltage in a first mode of operation; and a second loop circuit coupled to the amplifier. The second loop circuit may be configured to receive the comparison signal and output a second feedback voltage for the amplifier to use as the feedback voltage in a second mode of operation. The second feedback voltage may be greater than the first feedback voltage, and the second loop circuit may output a regulated voltage based on the comparison signal.Type: GrantFiled: February 18, 2020Date of Patent: August 2, 2022Assignee: Silicon Laboratories Inc.Inventors: Ricky Setiawan, Hua Beng Chan, Rex Tak Ying Wong
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Patent number: 11144104Abstract: In one form, an integrated circuit includes a negative voltage detector circuit and a logic circuit. The negative voltage detector circuit has a power supply input coupled to a power supply voltage terminal, a ground input coupled to a ground voltage terminal, a first input coupled to a first signal terminal, a second input coupled to a second signal terminal, and an output for providing an enable signal when a voltage on the first signal terminal is less than a voltage on the ground voltage terminal by at least a predetermined amount when a signal on said second signal terminal is in a first predetermined logic state. The logic circuit has an input for receiving the enable signal. The logic circuit changes an operation of the integrated circuit in response to an activation of the enable signal.Type: GrantFiled: February 14, 2020Date of Patent: October 12, 2021Assignee: SILICON LABORATORIES INC.Inventors: Rex Tak Ying Wong, Michael R. May, Pio Balmelli
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Publication number: 20210311540Abstract: An integrated circuit includes a first plurality of circuits receiving a first internal power supply voltage, a first regulator receiving an external power supply voltage and supplying the first internal power supply voltage at a first rated power in response to the external power supply voltage when the integrated circuit is in an active mode, a second regulator receiving the external power supply voltage for supplying the first internal power supply voltage at a second rated power less than said first rated power in response to the external power supply voltage when the integrated circuit is in a low power mode, and a controller controlling a transition of the integrated circuit between the active mode and the low power mode. The controller activates all of the first plurality of circuits in the active mode, but only a subset of them while keeping remaining ones inactive in the low power mode.Type: ApplicationFiled: April 6, 2020Publication date: October 7, 2021Applicant: Silicon Laboratories Inc.Inventors: Rex Tak Ying Wong, Ricky Setiawan, Hua Beng Chan, Yushan Jiang, Pio Balmelli
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Publication number: 20210255653Abstract: In an embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a first loop circuit coupled to the amplifier to receive the comparison signal and output a first feedback voltage for the amplifier to use as the feedback voltage in a first mode of operation; and a second loop circuit coupled to the amplifier. The second loop circuit may be configured to receive the comparison signal and output a second feedback voltage for the amplifier to use as the feedback voltage in a second mode of operation. The second feedback voltage may be greater than the first feedback voltage, and the second loop circuit may output a regulated voltage based on the comparison signal.Type: ApplicationFiled: February 18, 2020Publication date: August 19, 2021Inventors: RICKY SETIAWAN, HUA BENG CHAN, REX TAK YING WONG
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Publication number: 20210255654Abstract: In one embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a loop circuit coupled to the amplifier, where the loop circuit is to receive the comparison signal and provide a regulated voltage to the amplifier as the feedback voltage in a first mode of operation, and in a second mode of operation to provide a predetermined feedback ratio point to the amplifier as the feedback voltage; and an output device coupled to the amplifier. The output device may be configured to receive a supply voltage and the comparison signal and output the regulated voltage at an output node based at least in part on the comparison signal.Type: ApplicationFiled: April 14, 2021Publication date: August 19, 2021Inventors: HUA BENG CHAN, REX TAK YING WONG, RICKY SETIAWAN
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Publication number: 20210255678Abstract: In one form, an integrated circuit includes a negative voltage detector circuit and a logic circuit. The negative voltage detector circuit has a power supply input coupled to a power supply voltage terminal, a ground input coupled to a ground voltage terminal, a first input coupled to a first signal terminal, a second input coupled to a second signal terminal, and an output for providing an enable signal when a voltage on the first signal terminal is less than a voltage on the ground voltage terminal by at least a predetermined amount when a signal on said second signal terminal is in a first predetermined logic state. The logic circuit has an input for receiving the enable signal. The logic circuit changes an operation of the integrated circuit in response to an activation of the enable signal.Type: ApplicationFiled: February 14, 2020Publication date: August 19, 2021Applicant: Silicon Laboratories Inc.Inventors: Rex Tak Ying Wong, Michael R. May, Pio Balmelli
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Patent number: 11029716Abstract: In one embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a loop circuit coupled to the amplifier, where the loop circuit is to receive the comparison signal and provide a regulated voltage to the amplifier as the feedback voltage in a first mode of operation, and in a second mode of operation to provide a predetermined feedback ratio point to the amplifier as the feedback voltage; and an output device coupled to the amplifier. The output device may be configured to receive a supply voltage and the comparison signal and output the regulated voltage at an output node based at least in part on the comparison signal.Type: GrantFiled: February 18, 2020Date of Patent: June 8, 2021Assignee: Silicon Laboratories Inc.Inventors: Hua Beng Chan, Rex Tak Ying Wong, Ricky Setiawan
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Patent number: 7649384Abstract: A high-voltage tolerant output driver for use in a switching regulator is provided herein. The driver allows the switching regulator to regulate supply voltages that exceed device breakdown limits for the process technology from which the high-voltage tolerant output driver is fabricated. Unregulated supply voltages can vary over a wide range. The regulator only needs two intermediate voltages.Type: GrantFiled: February 5, 2008Date of Patent: January 19, 2010Assignee: Broadcom CorporationInventors: Seng Poh Ho, Tak Ying Wong, Yow Ching Cheng, Ricky Setiawan
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Publication number: 20090195267Abstract: A high-voltage tolerant output driver for use in a switching regulator is provided herein. The driver allows the switching regulator to regulate supply voltages that exceed device breakdown limits for the process technology from which the high-voltage tolerant output driver is fabricated. Unregulated supply voltages can vary over a wide range. The regulator only needs two intermediate voltages.Type: ApplicationFiled: February 5, 2008Publication date: August 6, 2009Applicant: Broadcom CorporationInventors: Seng Poh Ho, Tak Ying Wong, Yow Ching Cheng, Ricky Setiawan
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Patent number: 6798249Abstract: A current mode logic (CML) flip flop includes a first CML latch and a second CML latch. A plurality of pull-up switches are responsive to a reset signal. Outputs of the first and second CML latches are pulled up to a supply voltage through the pull-up switches. The first CML latch includes a first pull-up isolation switch driven by the reset signal for resetting the latch.Type: GrantFiled: November 26, 2002Date of Patent: September 28, 2004Assignee: Broadcom CorporationInventors: Tak Ying Wong, David Ho, Wee Teck Lee, Khim Leng Low
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Publication number: 20040100307Abstract: A current mode logic (CML) flip flop includes a first CML latch and a second CML latch. A plurality of pull-up switches are responsive to a reset signal. Outputs of the first and second CML latches are pulled up to a supply voltage through the pull-up switches. The first CML latch includes a first pull-up isolation switch driven by the reset signal for resetting the latch.Type: ApplicationFiled: November 26, 2002Publication date: May 27, 2004Applicant: Broadcom CorporationInventors: Tak Ying Wong, David Ho, Wee Teck Lee, Khim Leng Low