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公开(公告)号：US20210288648A1
公开(公告)日：2021-09-16
申请号：US16820659
申请日：2020-03-16
Applicant: Apple Inc.
Inventor： Nathan F. Hanagami , Hao Zhou , Jianbao Wang , Ruopeng Wang , Ludmil N. Nikolov
IPC: H03K19/0185 , H03K19/003 , H03K19/173 , H03K19/21 , H03K19/017
Abstract: A level shifter circuit with an intermediate power domain and method for operating the same is disclosed. The level shifter circuit includes an input circuit, an output circuit, and an intermediate circuit. The input circuit is coupled to receive an input signal from a first voltage domain operating according to a first supply voltage, and generates a first intermediate signal. The intermediate circuit receives the first intermediate signal and generates a second intermediate signal. The output circuit receives the intermediate signal and provides an output signal into a second voltage domain operating at a second supply voltage different from the first. A voltage multiplexer is configured to provide one of the first or second supply voltages to the intermediate circuit depending on a state of the input signal.
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Patent Agency Ranking
公开(公告)号：US20220075402A1
公开(公告)日：2022-03-10
申请号：US17017639
申请日：2020-09-10
Applicant: Apple Inc.
Inventor： Ruopeng Wang , Jay B. Fletcher
Abstract: A voltage regulator circuit includes a switch device that is coupled between an input power supply and a regulated power supply node. The voltage regulator circuit adjusts a value of a current flowing from the input power supply to the regulated power supply node by modifying a voltage level of a control node coupled to the switch device. A control circuit adjusts the voltage level of the control node using an error signal based on a comparison of the voltage level of the regulated power supply node and a reference voltage. To improve the response time of the voltage regulator circuit to changes in load current, the control circuit additionally sources current to and/or sinks current from the control node based on a voltage level of the control node.
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公开(公告)号：US11467614B2
公开(公告)日：2022-10-11
申请号：US17017639
申请日：2020-09-10
Applicant: Apple Inc.
Inventor： Ruopeng Wang , Jay B. Fletcher
Abstract: A voltage regulator circuit includes a switch device that is coupled between an input power supply and a regulated power supply node. The voltage regulator circuit adjusts a value of a current flowing from the input power supply to the regulated power supply node by modifying a voltage level of a control node coupled to the switch device. A control circuit adjusts the voltage level of the control node using an error signal based on a comparison of the voltage level of the regulated power supply node and a reference voltage. To improve the response time of the voltage regulator circuit to changes in load current, the control circuit additionally sources current to and/or sinks current from the control node based on a voltage level of the control node.
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公开(公告)号：US10146240B1
公开(公告)日：2018-12-04
申请号：US15886700
申请日：2018-02-01
Applicant: Apple Inc.
Inventor： Ruopeng Wang , Dashun Xue , Jiandong Jiang , Jay B. Fletcher
Abstract: A voltage regulator having a pre-regulator circuit is disclosed. A low dropout (LDO) voltage regulator includes an amplifier circuit, a current buffer circuit, and a pre-regulator circuit. The current buffer circuit includes a transistor having a gate terminal coupled to the amplifier output. The current buffer provides a current based at least in part on the output signal generated by the amplifier. The pre-regulator circuit is coupled to provide a dynamic supply voltage to the current buffer. They dynamic supply voltage depends at least in part on a fixed supply voltage provided thereto, as well as the output voltage provided by the LDO voltage regulator.
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公开(公告)号：US20250110543A1
公开(公告)日：2025-04-03
申请号：US18478355
申请日：2023-09-29
Applicant: Apple Inc.
Inventor： Nathan F Hanagami , Maryam Mortazavi , Ruopeng Wang , Ludmil N Nikolov , Floyd L Dankert , Enrico Zanetti , Jianbao Wang , Kiranjit Dhaliwal
IPC: G06F1/3234
Abstract: Systems and methods described herein correspond to supply harvesting operations. Power management circuitry may receive a supply voltage from other power management circuitry. This supply voltage may be a harvested supply from the other power management circuitry. Moreover, some of the power management circuitry may be operated as controller power management circuitry to supply the supply voltage via one or more rails and some of the power management circuitry may be operated as leaf power management circuitry to harvest the supply voltage from the one or more rails. Leaf power management circuitry may exclude a regulator, enabling that leaf power management circuitry to be entered into a lower power mode than previously enabled when the regulator was included.
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公开(公告)号：US11128300B1
公开(公告)日：2021-09-21
申请号：US16820659
申请日：2020-03-16
Applicant: Apple Inc.
Inventor： Nathan F. Hanagami , Hao Zhou , Jianbao Wang , Ruopeng Wang , Ludmil N. Nikolov
IPC: H03L5/00 , H03K19/0185 , H03K19/003 , H03K19/017 , H03K19/21 , H03K19/173
Abstract: A level shifter circuit with an intermediate power domain and method for operating the same is disclosed. The level shifter circuit includes an input circuit, an output circuit, and an intermediate circuit. The input circuit is coupled to receive an input signal from a first voltage domain operating according to a first supply voltage, and generates a first intermediate signal. The intermediate circuit receives the first intermediate signal and generates a second intermediate signal. The output circuit receives the intermediate signal and provides an output signal into a second voltage domain operating at a second supply voltage different from the first. A voltage multiplexer is configured to provide one of the first or second supply voltages to the intermediate circuit depending on a state of the input signal.
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