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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：US11032501B2
公开(公告)日：2021-06-08
申请号：US16272228
申请日：2019-02-11
Applicant: Apple Inc.
Inventor： Dusan Stepanovic , Sedigheh Hashemi , Mansour Keramat , Hyunsik Park
Abstract: An image sensing system and methods for operating the same are disclosed. An image sensing system includes a plurality of pixel circuits, a multiplexer configured to select one of the pixel circuit and provide analog pixel data without sampling, and a successive approximation register (SAR) analog-to-digital converter (ADC) configured to convert the analog pixel data into digital data. The SAR ADC includes a capacitive digital-to-analog converter (CDAC) configured to convert contents of the SAR into a corresponding analog signal for comparison, by a comparator, with the analog pixel data. The CDAC includes a two-dimensional array of circuit elements. A control circuit in the image sensing system is configured to cause random ones of the circuit elements of the CDAC to be selected for generation of the corresponding analog signal and add a dithering signal so a CDAC output and shuffle a multiplexer switch sequence to improve fixed pattern noise.
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公开(公告)号：US10453791B2
公开(公告)日：2019-10-22
申请号：US15890135
申请日：2018-02-06
Applicant: Apple Inc.
Inventor： Yi Chun A. Fu , Mansour Keramat , Vijay Srinivas
Abstract: Capacitor structures with pitch-matched capacitor unit cells are described. In an embodiment, the capacitor unit cells are formed by interdigitated finger electrodes. The finger electrodes may be pitch-matched in multiple metal layers within a capacitor unit cell, and the finger electrodes may be pitch-matched among an array of capacitor unit cells. Additionally, border unit cells may be pitch-matched with the capacitor unit cells.
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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：US10931243B2
公开(公告)日：2021-02-23
申请号：US16281927
申请日：2019-02-21
Applicant: Apple Inc.
Inventor： Vahid Majidzadeh Bafar , Mansour Keramat , Tao Wang
Abstract: A signal coupling method and apparatus is disclosed. A coupling network is coupled to convey signals from first functional circuit block to a second functional circuit block. The coupling network includes a first signal path having a first capacitor for providing AC coupling between the first and second functional circuit blocks. The coupling network further includes a second signal path in parallel with the first signal path. The second signal path includes a switched capacitor circuit coupled to receive a first common mode voltage corresponding to the first functional circuit block and a second common mode voltage corresponding to the second functional circuit block.
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公开(公告)号：US20200274501A1
公开(公告)日：2020-08-27
申请号：US16281927
申请日：2019-02-21
Applicant: Apple Inc.
Inventor： Vahid Majidzadeh Bafar , Mansour Keramat , Tao Wang
Abstract: A signal coupling method and apparatus is disclosed. A coupling network is coupled to convey signals from first functional circuit block to a second functional circuit block. The coupling network includes a first signal path having a first capacitor for providing AC coupling between the first and second functional circuit blocks. The coupling network further includes a second functional circuit block having a second signal path in parallel with the first signal path. The second signal path includes a switched capacitor circuit coupled to receive a first common mode voltage corresponding to the first functional circuit block and a second common mode voltage corresponding to the second functional circuit block.
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公开(公告)号：US09893737B1
公开(公告)日：2018-02-13
申请号：US15406077
申请日：2017-01-13
Applicant: Apple Inc.
Inventor： Mansour Keramat , KiYoung Nam , Vijay Srinivas
Abstract: An apparatus includes a series of analog-to-digital converter (ADC) stages and a comparison circuit coupled to a first ADC stage. The first ADC stage may be configured to compare an input signal to one or more conversion thresholds to generate a result. The first ADC stage may also be configured to generate an output signal based on a value of the result. In response to an assertion of a reset signal, the first ADC stage may be configured to set a level of the output signal voltage to a particular voltage. The comparison circuit may be configured to assert the reset signal in response to a determination that the input signal voltage exceeds an operating range defined by an upper overload threshold voltage and a lower overload threshold 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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