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公开(公告)号：US20210396805A1
公开(公告)日：2021-12-23
申请号：US16906715
申请日：2020-06-19
申请人： Apple Inc.
发明人： Ke Yun , Weibiao Zhang , Bruno W. Garlepp , Gin S. Yee
摘要： An apparatus includes an integrated circuit that includes an in-circuit power switch coupled to a power supply node, a functional circuit coupled between the in-circuit power switch and a ground node, a test circuit, and a test power switch coupled to the test circuit, wherein the test power switch is a replica of the in-circuit power switch. The test circuit is configured to determine characteristics of the test power switch, and to measure a voltage difference across the in-circuit power switch. The test circuit is also configured to use the characteristics of the test power switch and the voltage difference to determine a power consumption of the functional circuit.
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公开(公告)号：US20230101044A1
公开(公告)日：2023-03-30
申请号：US17485125
申请日：2021-09-24
申请人： Apple Inc.
发明人： Craig P. Finlinson , Weibiao Zhang , Tao Zeng
IPC分类号： G01K7/21
摘要： Various techniques for implementing resistive temperature sensors that rely on the resistors' temperature sensitivity to provide temperature sensing are disclosed. Temperature sensitive resistors may be implemented in a resistor stack in combination with a resistor stack of resistors that are relatively temperature indifferent. Various temperature sensor circuits implementing these temperature sensitive resistors are also disclosed. A temperature sensor circuit may implement the temperature sensitive resistors along with the resistors that are relatively stable with temperature to output a voltage signal that is indicative of the temperature sensed by the circuit. In some instances, the signal from the temperature sensitive resistors is increased through the use of a feedback resistor loop.
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公开(公告)号：US11215664B1
公开(公告)日：2022-01-04
申请号：US16906715
申请日：2020-06-19
申请人： Apple Inc.
发明人： Ke Yun , Weibiao Zhang , Bruno W. Garlepp , Gin S. Yee
摘要： An apparatus includes an integrated circuit that includes an in-circuit power switch coupled to a power supply node, a functional circuit coupled between the in-circuit power switch and a ground node, a test circuit, and a test power switch coupled to the test circuit, wherein the test power switch is a replica of the in-circuit power switch. The test circuit is configured to determine characteristics of the test power switch, and to measure a voltage difference across the in-circuit power switch. The test circuit is also configured to use the characteristics of the test power switch and the voltage difference to determine a power consumption of the functional circuit.
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公开(公告)号：US10088857B1
公开(公告)日：2018-10-02
申请号：US15715381
申请日：2017-09-26
申请人： Apple Inc.
摘要： A highly granular voltage regulator is disclosed. The voltage regulator circuit includes first and second current mirror circuits coupled to first and second control circuits, respectively. The voltage regulator circuit further includes an amplifier having an inverting input and a non-inverting input. The first current mirror circuit is coupled to the non-inverting input, whereas the second current mirror circuit is coupled to the inverting input. The first control circuit is operable to control a current provided by the first current mirror circuit, while the second control circuit is operable to control a current provided by the second current mirror circuit.
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公开(公告)号：US12098964B2
公开(公告)日：2024-09-24
申请号：US17485125
申请日：2021-09-24
申请人： Apple Inc.
发明人： Craig P. Finlinson , Weibiao Zhang , Tao Zeng
CPC分类号： G01K7/21 , G01K15/005
摘要： Various techniques for implementing resistive temperature sensors that rely on the resistors' temperature sensitivity to provide temperature sensing are disclosed. Temperature sensitive resistors may be implemented in a resistor stack in combination with a resistor stack of resistors that are relatively temperature indifferent. Various temperature sensor circuits implementing these temperature sensitive resistors are also disclosed. A temperature sensor circuit may implement the temperature sensitive resistors along with the resistors that are relatively stable with temperature to output a voltage signal that is indicative of the temperature sensed by the circuit. In some instances, the signal from the temperature sensitive resistors is increased through the use of a feedback resistor loop.
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公开(公告)号：US10566972B1
公开(公告)日：2020-02-18
申请号：US16373490
申请日：2019-04-02
申请人： Apple Inc.
发明人： Weibiao Zhang
IPC分类号： H03K19/0185 , H03K5/08 , H03K19/00 , G06F1/3296 , G06F1/324
摘要： A system and method for efficiently receiving analog input signals. In various embodiments, a functional unit includes a switch in its interface logic. The switch receives an analog input signal, and when enabled, conveys the received input signal as an analog output signal. The switch is enabled when the received enable signal is asserted. However, when the power supply voltage is at a logic low level, an output n-type device is disabled while an output p-type device is enabled. A guard p-type device serially connected with the output p-type device is disabled by other devices used to control the guard p-type device. The control devices also ensure that the body terminals of the guard p-type device and other p-type devices receive a logic high level regardless of the power supply value, which prevents forward bias currents in parasitic diodes of the p-type devices.
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