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公开(公告)号：US20220038130A1
公开(公告)日：2022-02-03
申请号：US16983619
申请日：2020-08-03
Applicant: Apple Inc.
Inventor： Heegon Kim , Abhilash Rajagopal , Samir Bouadjel
Abstract: Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node.
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公开(公告)号：US10148447B1
公开(公告)日：2018-12-04
申请号：US15264194
申请日：2016-09-13
Applicant: Apple Inc.
Inventor： Abhilash Rajagopal , Kevin White , Leland W. Lew , Paul A. Baker
Abstract: Aspects of the present disclosure involve a circuit for delivering electrical power from a direct current voltage source to an electronic system. The circuit may include a power injection circuit that injects a first portion of the power from a supply voltage of the source to a first data line and a second portion of the power from the supply voltage to a second data line. The power injection circuit may include first and second conductive paths from the supply voltage to the first and second data lines having first and second inductances, respectively, as well as a third conductive path between the first and second data lines having a third inductance greater than the first and second inductances. A conductive support structure may carry return current from the electronic system to the source.
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公开(公告)号：US20200089643A1
公开(公告)日：2020-03-19
申请号：US16134811
申请日：2018-09-18
Applicant: Apple Inc.
Inventor： Hao Shi , Gary S. Thomason , Abhilash Rajagopal , Jason W. Leung , Koussalya Balasubramanian , Venus Kumar
IPC: G06F13/40 , H01R13/646 , H04L25/02
Abstract: A data network may include a data bus and network nodes. The data bus may be a differential data bus having first and second differential signal lines that convey differential signals between the nodes. A bimodal impedance terminator may be coupled to the first and second differential signal lines at one or both ends of the data bus. The bimodal impedance terminator may include a first resistor coupled between the first differential signal line and a circuit node and a second resistor coupled between the second differential signal line and the circuit node. A capacitor may be coupled between the circuit node and ground. A third resistor may be coupled between the circuit node and ground in series with the capacitor. The bimodal impedance terminator may terminate both the differential-mode impedance and the common-mode impedance of the data bus to reduce signal reflections at the ends of the data bus.
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公开(公告)号：US20220352920A1
公开(公告)日：2022-11-03
申请号：US17867154
申请日：2022-07-18
Applicant: Apple Inc.
Inventor： Heegon Kim , Abhilash Rajagopal , Samir Bouadjel
Abstract: Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node.
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公开(公告)号：US10911268B1
公开(公告)日：2021-02-02
申请号：US16800501
申请日：2020-02-25
Applicant: Apple Inc.
Inventor： Abhilash Rajagopal , Paul A. Baker , Neven Pischl
Abstract: Systems for power over data line applications with low mode conversion are described. For example, an apparatus may include a magnetic core; a first conductive coil wound in a first winding direction around the magnetic core; a second conductive coil wound in a second winding direction around the magnetic core; a first conductive lead connecting a first end of the first conductive coil to a first pin; a second conductive lead connecting a second end of the first conductive coil to a second pin; a third conductive lead connecting a first end of the second conductive coil to a third pin, wherein lengths of the first conductive lead and the third conductive lead are equal; and a fourth conductive lead connecting a second end of the second conductive coil to a fourth pin, wherein lengths of the second conductive lead and the fourth conductive lead are equal.
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Patent Agency Ranking
公开(公告)号：US11652502B2
公开(公告)日：2023-05-16
申请号：US17867154
申请日：2022-07-18
Applicant: Apple Inc.
Inventor： Heegon Kim , Abhilash Rajagopal , Samir Bouadjel
CPC classification number: H04B1/40 , H03F3/45475 , H03H7/0138 , H03F2200/451
Abstract: Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node.
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公开(公告)号：US11528155B2
公开(公告)日：2022-12-13
申请号：US17235392
申请日：2021-04-20
Applicant: Apple Inc.
Inventor： Heegon Kim , Abhilash Rajagopal , Samir Bouadjel
Abstract: Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node. Some implementations include a first inductor with an inductance within twenty percent of 1 microhenry and a capacitance less than a tenth of a picofarad is included in a filter coupling a power supply to transmission line. The first inductor may connect to the transmission line.
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公开(公告)号：US20250102641A1
公开(公告)日：2025-03-27
申请号：US18811191
申请日：2024-08-21
Applicant: Apple Inc.
Inventor： Abhilash Rajagopal , Chentian Zhu , Heegon Kim , James C. Chiappe
IPC: G01S7/4861 , H01B11/12
Abstract: A system includes processing circuitry communicatively coupled to a coaxial cable as well as a sensor, such as a light detection and ranging (LIDAR) sensor communicatively coupled to an unshielded twisted pair (UTP) cable. The processing circuitry and LIDAR sensor may be communicatively coupled to one another via a UTP-to-coaxial converter that is communicatively coupled to both the coaxial cable and the UTP cable. The UTP-to-coaxial converter includes filter circuitry configured to receive one or more signals generated by the LIDAR sensor and generate one or more filtered signals by blocking a portion of the one or more signals having a frequency in a first frequency range. The UTP-to-coaxial converter is configured to send the one or more filtered signals to the processing circuitry via the coaxial cable.
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公开(公告)号：US20220038297A1
公开(公告)日：2022-02-03
申请号：US17235392
申请日：2021-04-20
Applicant: Apple Inc.
Inventor： Heegon Kim , Abhilash Rajagopal , Samir Bouadjel
IPC: H04L12/10
Abstract: Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node. Some implementations include a first inductor with an inductance within twenty percent of 1 microhenry and a capacitance less than a tenth of a picofarad is included in a filter coupling a power supply to transmission line. The first inductor may connect to the transmission line.
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公开(公告)号：US10592458B1
公开(公告)日：2020-03-17
申请号：US16134811
申请日：2018-09-18
Applicant: Apple Inc.
Inventor： Hao Shi , Gary S. Thomason , Abhilash Rajagopal , Jason W. Leung , Koussalya Balasubramanian , Venus Kumar
IPC: H03K17/16 , H03K19/003 , G06F13/40 , H04L25/02 , H01R13/646
Abstract: A data network may include a data bus and network nodes. The data bus may be a differential data bus having first and second differential signal lines that convey differential signals between the nodes. A bimodal impedance terminator may be coupled to the first and second differential signal lines at one or both ends of the data bus. The bimodal impedance terminator may include a first resistor coupled between the first differential signal line and a circuit node and a second resistor coupled between the second differential signal line and the circuit node. A capacitor may be coupled between the circuit node and ground. A third resistor may be coupled between the circuit node and ground in series with the capacitor. The bimodal impedance terminator may terminate both the differential-mode impedance and the common-mode impedance of the data bus to reduce signal reflections at the ends of the data bus.
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