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公开(公告)号：US20230083084A1
公开(公告)日：2023-03-16
申请号：US17508016
申请日：2021-10-22
Applicant: Apple Inc.
Inventor： Soheil Golara , Seyedeh Sedigheh Hashemi , Mansour Keramat
Abstract: A reference generator circuit included in a computer system may employ multiple field-effect transistors to generate a reference voltage whose value is based on the threshold voltages of the multiple field-effect transistors. The reference generator circuit can include a current source that generates a bias current. One of more stages included in the reference generator circuit can generate, using the bias current, respective output voltages whose values are based on differences in threshold voltages of field-effect transistors included in the stages. The output voltages can be combined to generate different reference voltage values.
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2.发明申请公开(公告)号：US20210247793A1
公开(公告)日：2021-08-12
申请号：US17181950
申请日：2021-02-22
Applicant: Apple Inc.
Inventor： Seyedeh Sedigheh Hashemi , Vahid Majidzadeh Bafar , Ali Mesgarani , Mansour Keramat
IPC: G05F3/26 , G05F3/20 , G11C11/4074 , G11C5/14
Abstract: A power detect circuit is disclosed. A power detect circuit includes a voltage multiplier that receives an external supply voltage and generates a second supply voltage that is greater than the former. A voltage regulator is coupled to receive the second supply voltage and outputs a regulated supply voltage. A bandgap circuit is coupled to receive the second supply voltage when a first switch is closed, and the regulated supply voltage when a second switch is closed. The bandgap circuit generates a reference voltage for the voltage regulator, as well as one or more output voltages. A comparator circuit is coupled to receive the one or more output voltages from the bandgap circuit, and may compare these one or more output voltages to the regulated supply voltage.
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公开(公告)号：US20250003809A1
公开(公告)日：2025-01-02
申请号：US18345253
申请日：2023-06-30
Applicant: Apple Inc.
Inventor： Soheil GOLARA , Daniel Joel Bankman , Robin Gupta , Seyedeh Sedigheh Hashemi , Mansour Keramat
IPC: G01K7/01
Abstract: The present disclosure describes embodiments of a temperature sensor with full band PSR. The temperature sensor can include a reference voltage generator, a temperature circuit, and an analog-to-digital converter (ADC). The reference voltage generator is configured to generate a reference voltage. The temperature circuit is configured to operate under a substantially constant bias current and to generate a temperature signal proportional to temperature. The ADC is electrically coupled to the reference voltage generator and the temperature circuit and configured to convert the temperature signal to a digital representation based on a sampling frequency. The ADC comprises a frequency generator configured to generate a modulation frequency having a random variation. The sampling frequency is modulated by the modulation frequency.
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4.发明授权公开(公告)号：US11841726B2
公开(公告)日：2023-12-12
申请号：US17181950
申请日：2021-02-22
Applicant: Apple Inc.
Inventor： Seyedeh Sedigheh Hashemi , Vahid Majidzadeh Bafar , Ali Mesgarani , Mansour Keramat
IPC: G05F3/26 , G05F3/20 , G11C5/14 , G11C11/4074
CPC classification number: G05F3/26 , G05F3/205 , G11C5/147 , G11C11/4074
Abstract: A power detect circuit is disclosed. A power detect circuit includes a voltage multiplier that receives an external supply voltage and generates a second supply voltage that is greater than the former. A voltage regulator is coupled to receive the second supply voltage and outputs a regulated supply voltage. A bandgap circuit is coupled to receive the second supply voltage when a first switch is closed, and the regulated supply voltage when a second switch is closed. The bandgap circuit generates a reference voltage for the voltage regulator, as well as one or more output voltages. A comparator circuit is coupled to receive the one or more output voltages from the bandgap circuit, and may compare these one or more output voltages to the regulated supply voltage.
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公开(公告)号：US12055962B2
公开(公告)日：2024-08-06
申请号：US17508016
申请日：2021-10-22
Applicant: Apple Inc.
Inventor： Soheil Golara , Seyedeh Sedigheh Hashemi , Mansour Keramat
Abstract: A reference generator circuit included in a computer system may employ multiple field-effect transistors to generate a reference voltage whose value is based on the threshold voltages of the multiple field-effect transistors. The reference generator circuit can include a current source that generates a bias current. One of more stages included in the reference generator circuit can generate, using the bias current, respective output voltages whose values are based on differences in threshold voltages of field-effect transistors included in the stages. The output voltages can be combined to generate different reference voltage values.
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Patent Agency Ranking
公开(公告)号：US11988565B2
公开(公告)日：2024-05-21
申请号：US17313844
申请日：2021-05-06
Applicant: Apple Inc.
Inventor： Ali Mesgarani , Farzan Farbiz , Ke Yun , Dusan Stepanovic , Seyedeh Sedigheh Hashemi , Mansour Keramat
Abstract: A sensor system included in an integrated circuit includes multiple sensor circuits and a control circuit. Using characterization data, a model may be generated that defines a relationship between measurable parameters of the integrated circuit and an operating characteristic of the integrated circuit. The control circuit can combine, using a function included in the model, data from the multiple sensor circuits to determine a value of the operating characteristic that is more accurate than a sensor circuit configured to measure a single parameter of the integrated circuit that varies with the operating characteristic.
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公开(公告)号：US20240110959A1
公开(公告)日：2024-04-04
申请号：US17986612
申请日：2022-11-14
Applicant: Apple Inc.
Inventor： Arunvenkatesh Alagappan , Soheil Golara , Seyedeh Sedigheh Hashemi
Abstract: An integrated circuit can include frequency monitoring circuitry. The frequency monitoring circuitry may include a voltage based frequency monitoring circuit for monitoring an input clock signal having an input clock frequency within a first set of frequencies and a coarse frequency monitoring circuit for monitoring an input clock signal having an input clock frequency within a second set of frequencies different than the first set of frequencies. The voltage based frequency monitoring circuit can be configured to generate an output voltage having a first value when the input clock frequency is greater than a reference frequency and having a second value when the input clock frequency is less than the reference frequency. The coarse frequency monitoring circuit can include a reference counter and an input clock counter that generates a count value used to compute the input clock frequency.
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公开(公告)号：US12216484B2
公开(公告)日：2025-02-04
申请号：US18340759
申请日：2023-06-23
Applicant: Apple Inc.
Inventor： Sechang Oh , Soheil Golara , Denis C. Daly , Seyedeh Sedigheh Hashemi , Mansour Keramat
Abstract: A voltage reference circuit included in a computer system includes an asymmetric amplifier circuit that includes two metal-oxide semiconductor field-effect transistors with different threshold voltages. The voltage reference circuit also includes an output circuit that generates, using a control signal, a bias signal and an output current that is used by a divider circuit to generate a reference voltage and a feedback voltage. The reference voltage and bias signal are used by the amplifier circuit to generate the control signal, which is based on a difference between the transistors' threshold voltages.
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9.发明授权公开(公告)号：US12079022B2
公开(公告)日：2024-09-03
申请号：US18493796
申请日：2023-10-24
Applicant: Apple Inc.
Inventor： Seyedeh Sedigheh Hashemi , Vahid Majidzadeh Bafar , Ali Mesgarani , Mansour Keramat
IPC: G05F3/26 , G05F3/20 , G11C5/14 , G11C11/4074
CPC classification number: G05F3/26 , G05F3/205 , G11C5/147 , G11C11/4074
Abstract: A power detect circuit is disclosed. A power detect circuit includes a voltage multiplier that receives an external supply voltage and generates a second supply voltage that is greater than the former. A voltage regulator is coupled to receive the second supply voltage and outputs a regulated supply voltage. A bandgap circuit is coupled to receive the second supply voltage when a first switch is closed, and the regulated supply voltage when a second switch is closed. The bandgap circuit generates a reference voltage for the voltage regulator, as well as one or more output voltages. A comparator circuit is coupled to receive the one or more output voltages from the bandgap circuit, and may compare these one or more output voltages to the regulated supply voltage.
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公开(公告)号：US20220357212A1
公开(公告)日：2022-11-10
申请号：US17313844
申请日：2021-05-06
Applicant: Apple Inc.
Inventor： Ali Mesgarani , Farzan Farbiz , Ke Yun , Dusan Stepanovic , Seyedeh Sedigheh Hashemi , Mansour Keramat
Abstract: A sensor system included in an integrated circuit includes multiple sensor circuits and a control circuit. Using characterization data, a model may be generated that defines a relationship between measurable parameters of the integrated circuit and an operating characteristic of the integrated circuit. The control circuit can combine, using a function included in the model, data from the multiple sensor circuits to determine a value of the operating characteristic that is more accurate than a sensor circuit configured to measure a single parameter of the integrated circuit that varies with the operating characteristic.
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