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公开(公告)号：US20210255678A1
公开(公告)日：2021-08-19
申请号：US16791210
申请日：2020-02-14
Applicant: Silicon Laboratories Inc.
Inventor： Rex Tak Ying Wong , Michael R. May , Pio Balmelli
IPC: G06F1/26 , G01R19/165 , G06F13/40
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US11144104B2
公开(公告)日：2021-10-12
申请号：US16791210
申请日：2020-02-14
Applicant: Silicon Laboratories Inc.
Inventor： Rex Tak Ying Wong , Michael R. May , Pio Balmelli
IPC: G06F1/26 , G06F13/40 , G01R19/165 , G06F11/22
Abstract: 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.
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公开(公告)号：US12189408B2
公开(公告)日：2025-01-07
申请号：US17847404
申请日：2022-06-23
Applicant: Silicon Laboratories Inc.
Inventor： Ricky Setiawan , Hua Beng Chan , Rex Tak Ying Wong
Abstract: 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.
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公开(公告)号：US11543843B2
公开(公告)日：2023-01-03
申请号：US17230266
申请日：2021-04-14
Applicant: Silicon Laboratories Inc.
Inventor： Hua Beng Chan , Rex Tak Ying Wong , Ricky Setiawan
Abstract: 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.
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公开(公告)号：US20210311540A1
公开(公告)日：2021-10-07
申请号：US16841138
申请日：2020-04-06
Applicant: Silicon Laboratories Inc.
Inventor： Rex Tak Ying Wong , Ricky Setiawan , Hua Beng Chan , Yushan Jiang , Pio Balmelli
IPC: G06F1/3237 , H02M1/00 , G06F1/3234 , G06F1/28 , G06F1/3296
Abstract: 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.
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公开(公告)号：US11029716B1
公开(公告)日：2021-06-08
申请号：US16793154
申请日：2020-02-18
Applicant: Silicon Laboratories Inc.
Inventor： Hua Beng Chan , Rex Tak Ying Wong , Ricky Setiawan
Abstract: 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.
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