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1.发明公开公开(公告)号：US20240356577A1
公开(公告)日：2024-10-24
申请号：US18762436
申请日：2024-07-02
Applicant: Apple Inc.
Inventor： Saihua Lin
CPC classification number: H04B1/48 , H04B1/006 , H04B1/0064 , H04B2001/485
Abstract: Embodiments disclosed herein relate to reducing insertion loss in a transceiver while improving an operating efficiency of the transceiver. To do so, the transceiver may include isolation circuitry with harmonic distortion rejection circuitry, an electrostatic discharge filter, an out-of-band noise filter, and/or a matching network. In particular, the harmonic distortion rejection circuitry may enable a second harmonic signal to pass from a power amplifier of a transmitter of the transceiver to ground. The electrostatic discharge filter may also provide a path to ground for electrostatic discharge, and the out-of-band noise filter may provide a path to ground for noise signals. The isolation circuitry may substantially remove or decrease interference caused by undesirable signals while reducing a power consumption and thus improving an operating efficiency of the transceiver.
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公开(公告)号：US11978578B2
公开(公告)日：2024-05-07
申请号：US17823756
申请日：2022-08-31
Applicant: Apple Inc.
Inventor： Hongrui Wang , Saihua Lin , Abbas Komijani , Sohrab Emami-Neyestanak
CPC classification number: H01F27/2804 , H01F5/003 , H01F17/0013 , H01F38/14 , H03H7/0115 , H03H7/09 , H03H7/427 , H01F2017/0026 , H01F2027/2814 , H03H2001/0085
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：US20240048105A1
公开(公告)日：2024-02-08
申请号：US18485171
申请日：2023-10-11
Applicant: Apple Inc.
Inventor： Saihua Lin , Hongrui Wang , Sohrab Emami-Neyestanak
CPC classification number: H03F3/195 , H03F3/213 , H03F2200/451 , H03F2200/294
Abstract: The present disclosure relates to systems and methods for operating transceiver circuitry to transmit or receive signals on various frequency ranges. To do so, a transmitter or a receiver of the transceiver circuitry is selectively coupled to or uncoupled from an antenna of the transceiver circuitry. Additionally, radio frequency filters may be individually or collectively coupled to and/or uncoupled from the antenna to filter different frequencies in the transmitting or receiving signals.
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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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5.发明授权公开(公告)号：US11411596B1
公开(公告)日：2022-08-09
申请号：US17328783
申请日：2021-05-24
Applicant: Apple Inc.
Inventor： Saihua Lin
Abstract: Embodiments disclosed herein relate to reducing insertion loss in a transceiver while improving an operating efficiency of the transceiver. To do so, the transceiver may include isolation circuitry with harmonic distortion rejection circuitry, an electrostatic discharge filter, an out-of-band noise filter, and/or a matching network. In particular, the harmonic distortion rejection circuitry may enable a second harmonic signal to pass from a power amplifier of a transmitter of the transceiver to ground. The electrostatic discharge filter may also provide a path to ground for electrostatic discharge, and the out-of-band noise filter may provide a path to ground for noise signals. The isolation circuitry may substantially remove or decrease interference caused by undesirable signals while reducing a power consumption and thus improving an operating efficiency of the transceiver.
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Patent Agency Ranking
公开(公告)号：US20210055402A1
公开(公告)日：2021-02-25
申请号：US16549689
申请日：2019-08-23
Applicant: Apple Inc.
Inventor： Saihua Lin , Sohrab Emami-Neyestanak , Hongrui Wang
Abstract: A sensor circuit included in a computer system may include multiple antennae and transceiver circuits that include transmitter and receiver circuits. A particular transceiver circuit may transmit, via a particular antenna, a transmit signal that is a modulated version of a baseband signal, and generate a leakage signal based on leakage between transmitter and receiver circuits included in the particular transceiver circuit. A different transceiver circuit may generate a received signal using a reflected version of the transmitted signal that is received via a different antenna. An output signal may be generated using the received and leakage signals.
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公开(公告)号：US20190305919A1
公开(公告)日：2019-10-03
申请号：US15937467
申请日：2018-03-27
Applicant: Apple Inc.
Inventor： Saihua Lin , Sohrab Emami-Neyestanak
IPC: H04L5/14
Abstract: A triplexer having integrated switching circuitry is disclosed. In one embodiment, a triplexer is used, in a transmit mode, to combine a clock signal, a control signal, and a modulated (e.g., a radio frequency, or RF) signal into a composite signal for transmission over a transmission line. In a receive mode, the triplexer receives and separates the composite signal into the clock signal, the control signal, and the modulated signal. The triplexer further includes switching circuitry integrated therein. The switching circuitry is operable to switch the triplexer between the transmit and receive modes.
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公开(公告)号：US11824593B2
公开(公告)日：2023-11-21
申请号：US17941975
申请日：2022-09-09
Applicant: Apple Inc.
Inventor： Hongrui Wang , Abbas Komijani , Saihua Lin , Sohrab Emami-Neyestanak
IPC: H04B17/21 , H04B17/345 , H03B5/18
CPC classification number: H04B17/21 , H03B5/1829 , H04B17/345 , H04B2215/065
Abstract: An electronic device may include a harmonic rejection mixer with a delay line, mixer array, and load. The delay line may generate LO phases. Each mixer in the array may have a first input that receives an LO phase and a second input coupled to an input switch and the first input of the next mixer circuit through an inter-mixer switch. The load may include a set of switches. In a transmit mode, the input switches and set of switches may be closed while the inter-mixer switches are open. In a self-calibration mode, the input switches and set of switches may be open while the inter-mixer switches are closed. A controller may sweep through phase codes for the programmable delay line while storing a digital output from the load. The controller may calibrate the phase code based on the digital output.
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公开(公告)号：US20230093489A1
公开(公告)日：2023-03-23
申请号：US17688652
申请日：2022-03-07
Applicant: Apple Inc.
Inventor： Saihua Lin
Abstract: An electronic device may include wireless circuitry with a processor, a transceiver, an antenna, and a front-end module coupled between the transceiver and the antenna. The front-end module may include one or more power amplifiers for amplifying a signal for transmission through the antenna. A power amplifier may include an amplitude modulation distortion compensation circuit coupled to the input of the power amplifier. The compensation circuit may include adaptive biasing transistors each having a first source-drain terminal coupled to the input of the power amplifier, a second source-drain terminal coupled to a supply voltage, and a gate terminal configured to receive a control voltage via a big resistor. The control voltage can be set to a voltage level so that the adaptive biasing transistors are only turned on when the voltage swing at the input of the power amplifier is relatively large.
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公开(公告)号：US11296802B1
公开(公告)日：2022-04-05
申请号：US17031753
申请日：2020-09-24
Applicant: Apple Inc.
Inventor： Hongrui Wang , Abbas Komijani , Saihua Lin , Sohrab Emami-Neyestanak
IPC: H04B17/21 , H04B17/345 , H03B5/18
Abstract: An electronic device may include a harmonic rejection mixer with a delay line, mixer array, and load. The delay line may generate LO phases. Each mixer in the array may have a first input that receives an LO phase and a second input coupled to an input switch and the first input of the next mixer circuit through an inter-mixer switch. The load may include a set of switches. In a transmit mode, the input switches and set of switches may be closed while the inter-mixer switches are open. In a self-calibration mode, the input switches and set of switches may be open while the inter-mixer switches are closed. A controller may sweep through phase codes for the programmable delay line while storing a digital output from the load. The controller may calibrate the phase code based on the digital output.
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