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公开(公告)号：US20240427361A1
公开(公告)日：2024-12-26
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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公开(公告)号：US11137787B1
公开(公告)日：2021-10-05
申请号：US17006680
申请日：2020-08-28
Applicant: Apple Inc.
Inventor： Soheil Golara , Mansour Keramat , Seyedeh Sedigheh Hashemi
Abstract: A comparator circuit included in a computer system employs an inverter circuit as a high-speed comparison circuit. To allow the inverter circuit to compare an input signal to a particular threshold value, a trip point of the inverter circuit is adjusted to match the threshold value by modifying a voltage level of a power supply node coupled to the inverter. To modify the voltage level of the power supply node, a replica of the inverter circuit is biased to generate a bias signal that corresponds to the trip point of the inverter circuit. A comparator circuit compares the bias signal to the threshold value, and adjusts the voltage level of the power supply node using results of the comparison. An output circuit adjusts an output of the inverter circuit to generate a full-rail output signal.
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公开(公告)号：US12241920B2
公开(公告)日：2025-03-04
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：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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Patent Agency Ranking
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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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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公开(公告)号：US11296599B1
公开(公告)日：2022-04-05
申请号：US17235718
申请日：2021-04-20
Applicant: Apple Inc.
Inventor： Soheil Golara , Ali Mesgarani , Seyedeh Sedigheh Hashemi , Mansour Keramat
Abstract: A power supply circuit included in a computer system regulates a power supply voltage using an input power supply. During startup, the power supply circuit uses a first reference voltage that is generated using the input power supply to regulated the power supply voltage. After a period of time has elapsed, the power supply circuit switches to using a more accurate second reference voltage that is generated using the regulated power supply voltage.
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公开(公告)号：US11114938B1
公开(公告)日：2021-09-07
申请号：US17006700
申请日：2020-08-28
Applicant: Apple Inc.
Inventor： Soheil Golara , Ali Mesgarani , Mansour Keramat , Seyedeh Sedigheh Hashemi
IPC: H02M3/07
Abstract: A power supply circuit included in a computer system is configured to generate a particular voltage level on a regulated power supply node using multiple charge pump circuits coupled together via a regulation device to provide regulation. A first charge pump circuit is configured to, using a voltage of an input power supply node, generate an intermediate voltage level, which is regulated by the regulation device. The second charge pump is configured to generate a voltage level on the regulated power supply node using a regulated version of intermediate voltage level. An impedance of the regulation device is adjusted using results of comparing the voltage level of the regulated power supply node to a reference voltage.
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