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公开(公告)号：US11829175B2
公开(公告)日：2023-11-28
申请号：US17942807
申请日：2022-09-12
Applicant: Apple Inc.
Inventor： Reetika Kumari Agarwal , Abbas Komijani
Abstract: Embodiments disclosed herein relate to a low-voltage dropout regulator and more specifically to improving a power supply rejection ratio (PSRR) of the low dropout voltage regulator. The low dropout voltage regulator may be used to generate various voltages for integrated circuits of an electronic device. In some cases, a P-type metal-oxide-semiconductor (PMOS) low dropout (LDO) voltage regulator may be used. However, the PMOS LDO may not provide a sufficient PSRR or reduction in supply noise. To address these issues, an N-type metal-oxide-semiconductor (NMOS) LDO voltage regulator having an NMOS pass transistor may be used. The NMOS LDO may provide a lower impedance than the PMOS LDO. Further, the NMOS LDO may provide an increased bandwidth and consume a smaller physical area than the PMOS LDO.
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公开(公告)号：US20230352932A1
公开(公告)日：2023-11-02
申请号：US17661503
申请日：2022-04-29
Applicant: Apple Inc.
Inventor： Junjun Li , Abbas Komijani , Hongrui Wang
CPC classification number: H02H9/046 , H01L27/0255
Abstract: An output circuit included in an integrated circuit may employ multiple protection circuits to protect driver devices from damage during an electrostatic discharge event. One protection circuit clamps a signal port to a ground supply node upon detection of the electrostatic discharge event. Another protection circuit increases the voltage level of a control terminal to one of the driver devices during the electrostatic discharge event to reduce the voltage across the driver device and prevent damage to the device.
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公开(公告)号：US20220416720A1
公开(公告)日：2022-12-29
申请号：US17900714
申请日：2022-08-31
Applicant: Apple Inc.
Inventor： Abbas Komijani , Hongrui Wang , Sohrab Emami-Neyestanak
IPC: H03B5/12
Abstract: An electronic device may include a transceiver with mixer circuitry that up-converts or down-converts signals based on a voltage-controlled oscillator (VCO) signal. The transceiver circuitry may include first, second, third, and fourth VCOs. Each VCO may include a VCO core that receives a control voltage and an inductor coupled to the VCO core. Fixed linear capacitors may be coupled between the VCO cores. A switching network may be coupled between the VCOs. Control circuitry may place the VCO circuitry in one of four different operating modes and may switch between the operating modes to selectively control current direction in each of the inductors. The VCO circuitry may generate the VCO signal within a respective frequency range in each of the operating modes. The VCO circuitry may exhibit a relatively wide frequency range across all of the operating modes while introducing minimal phase noise to the system.
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公开(公告)号：US20220415559A1
公开(公告)日：2022-12-29
申请号：US17823756
申请日：2022-08-31
Applicant: Apple Inc.
Inventor： Hongrui Wang , Saihua Lin , Abbas Komijani , Sohrab Emami-Neyestanak
Abstract: Radio frequency filtering circuitry blocks certain frequencies in an outgoing signal so that the signal may be transmitted over a desired frequency. The radio frequency filtering circuitry includes a first inductor having a first coil and a second inductor coupled to and disposed within the first coil. The second inductor has a second coil and a third coil symmetrical to the second coil. When current is applied to the radio frequency filtering circuitry, the current in the second coil causes a first induced current in the first coil and the current in the third coil causes a second induced current in the first coil, wherein the second induced current is approximately equal in magnitude and opposite in direction to the first induced current. As such, the second induced current may compensate for the first induced current.
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公开(公告)号：US11381279B2
公开(公告)日：2022-07-05
申请号：US16953244
申请日：2020-11-19
Applicant: Apple Inc.
Inventor： Yashar Rajavi , Sohrab Emami-Neyestanak , Abbas Komijani
Abstract: A transceiver having a shared filter for both transmit and receive modes is disclosed. A transceiver includes a transmitter having an output coupled to a signal node, wherein the transmitter is configured to transmit signals onto the signal node during transceiver operation in a transmit mode. The transceiver also includes a receiver having an input coupled to the signal node, and configured to receive signals from the signal node during operation in the receive mode. The transceiver further includes a first filter coupled to the signal node, wherein the filter is shared by the transmitter and the receiver. The filter is coupled between the transceiver and a first terminal of a transmission line.
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Patent Agency Ranking
公开(公告)号：US20240348254A1
公开(公告)日：2024-10-17
申请号：US18135343
申请日：2023-04-17
Applicant: Apple Inc.
Inventor： Hongrui Wang , Abbas Komijani , Hideya Oshima , Reetika K Agarwal
CPC classification number: H03L7/0893 , H02M3/07
Abstract: In a charge pump-based PLL circuit, charge pump output current variation may cause phase instability at an output of a VCO. The output current variation may be caused by low-frequency disturbances (e.g., tuning voltage (Vtune) drift with channel length modulation effect), disturbance in a gate bias voltage of a transistor, or a VDD transient. Such a low-frequency disturbance may occur during initial lock, which may affect phase settling time, or after lock, which may result in phase instability. A replica charge pump and a current filtering and compensation circuit may be implemented at the output of a main charge pump to provide error current compensation to suppress channel length modulation effect, improve phase stability, and reduce phase noise.
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公开(公告)号：US12074568B2
公开(公告)日：2024-08-27
申请号：US17941767
申请日：2022-09-09
Applicant: Apple Inc.
Inventor： Hongrui Wang , Abbas Komijani
CPC classification number: H03B5/1228 , H03B5/1243 , H03L7/0891 , H03L7/093
Abstract: Voltage-controlled oscillation circuitry includes multiple cores and multiple mode or gain boosters coupled between the multiple cores. To prevent an undesired operating mode of the voltage-controlled oscillation circuitry from dominating a desired operating mode (e.g., an in-phase operating mode or an out-of-phase operating mode), the mode boosters may increase a desired gain of the desired operating mode and decrease an undesired gain of the undesired operating modes. In particular, mode boosters coupled to terminals of the cores that are associated with the desired operating mode may be enabled, while mode boosters coupled to terminals of the cores that are associated with the undesired operating mode may be disabled.
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公开(公告)号：US11817823B2
公开(公告)日：2023-11-14
申请号：US17748904
申请日：2022-05-19
Applicant: Apple Inc.
Inventor： Hongrui Wang , Abbas Komijani
CPC classification number: H03B5/12 , H03L1/00 , H04B1/40 , H03B2200/009 , H03B2200/0092 , H03B2201/038
Abstract: To prevent an undesired operating mode of voltage-controlled oscillation (VCO) circuitry from dominating a desired operating mode (e.g., an in-phase operating mode or an out-of-phase operating mode), a supply reset and ramp pulse may be provided to the VCO circuitry when switching to a new mode, such that supply voltage to the VCO circuitry is reset (e.g., set to 0 V or another reference voltage), and gradually increased or ramped up back to a steady-state voltage (e.g., used to maintain a mode) within a time duration. Additionally or alternatively, a switch control bootstrap pulse may be provided to the VCO circuitry that is bootstrapped to (e.g., applied instantaneously or concurrently with) switching the VCO circuitry to the new mode. After a time duration, the VCO circuitry may switch back to a steady-state voltage (e.g., used to maintain the new mode).
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公开(公告)号：US11757407B2
公开(公告)日：2023-09-12
申请号：US17900714
申请日：2022-08-31
Applicant: Apple Inc.
Inventor： Abbas Komijani , Hongrui Wang , Sohrab Emami-Neyestanak
CPC classification number: H03B5/1228 , H03B5/04 , H03B5/1212 , H03B5/1243 , H03B5/1265 , H03B5/1271 , H03L7/0891 , H03L7/097 , H03L7/099
Abstract: An electronic device may include a transceiver with mixer circuitry that up-converts or down-converts signals based on a voltage-controlled oscillator (VCO) signal. The transceiver circuitry may include first, second, third, and fourth VCOs. Each VCO may include a VCO core that receives a control voltage and an inductor coupled to the VCO core. Fixed linear capacitors may be coupled between the VCO cores. A switching network may be coupled between the VCOs. Control circuitry may place the VCO circuitry in one of four different operating modes and may switch between the operating modes to selectively control current direction in each of the inductors. The VCO circuitry may generate the VCO signal within a respective frequency range in each of the operating modes. The VCO circuitry may exhibit a relatively wide frequency range across all of the operating modes while introducing minimal phase noise to the system.
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公开(公告)号：US20220407560A1
公开(公告)日：2022-12-22
申请号：US17810332
申请日：2022-06-30
Applicant: Apple Inc.
Inventor： Yashar Rajavi , Sohrab Emami-Neyestanak , Abbas Komijani
Abstract: A transceiver having a shared filter for both transmit and receive modes is disclosed. A transceiver includes a transmitter having an output coupled to a signal node, wherein the transmitter is configured to transmit signals onto the signal node during transceiver operation in a transmit mode. The transceiver also includes a receiver having an input coupled to the signal node, and configured to receive signals from the signal node during operation in the receive mode. The transceiver further includes a first filter coupled to the signal node, wherein the filter is shared by the transmitter and the receiver. The filter is coupled between the transceiver and a first terminal of a transmission line.
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