公开(公告)号：US10938396B2

公开(公告)日：2021-03-02

申请号：US16352043

申请日：2019-03-13

Applicant: Apple Inc.

Inventor： Abhishek Agrawal ,  Alon Cohen ,  Gil Horovitz ,  Somnath Kundu ,  Run Levinger ,  Stefano Pellerano ,  Jahnavi Sharma ,  Evgeny Shumaker ,  Izhak Hod

IPC: H03L7/081 ,  H03L7/083

Abstract: A quadrature based voltage controlled oscillator (VCO) local oscillator (LO) system is disclosed. The system includes a phase detector, a quadrature phase VCO, a quadrature control path, an in-phase control path, and an in-phase VCO. The phase detector is configured to compare and generate phase error between a reference clock and an in-phase VCO output. The quadrature control path configured to generate a quadrature control voltage based on a quadrature VCO output and the in-phase VCO output. The quadrature phase VCO configured to generate the quadrature VCO output based on the quadrature control voltage and the generated phase error. The in-phase control path configured to generate an in-phase control voltage based on the quadrature VCO output and the in-phase VCO output. The in-phase VCO is configured to generate the in-phase VCO output based on the in-phase control voltage and the generated phase error. An all digital dual mode phase locked/phase tracking loop LO generate system is also disclosed.

公开(公告)号：US10928479B2

公开(公告)日：2021-02-23

申请号：US15951202

申请日：2018-04-12

Applicant: Apple Inc.

Inventor： Alon Cohen ,  Eran Gerson ,  Gaby Prechner ,  Michael Bogdanov

IPC: G01S1/30 ,  G01S13/87 ,  G01S13/32 ,  G01S7/00 ,  G01S13/08 ,  G01S13/88 ,  G01S13/82

Abstract: An apparatus for determining a distance to an object is provided. The apparatus includes a first transceiver configured to transmit a first radio frequency signal. Further, the apparatus includes a second transceiver configured to transmit a second radio frequency signal in response to receiving the first radio frequency signal. The apparatus additionally includes a processing circuit configured to determine the distance to the object based on a transmission time of the first radio frequency signal and a reception time, at the first transceiver, of a reflected component of the second radio frequency signal that is reflected by the object.

公开(公告)号：US20210013843A1

公开(公告)日：2021-01-14

申请号：US16977566

申请日：2018-03-29

Applicant: Apple Inc.

Inventor： Alon Cohen ,  Ilia Yoffe (Iofedov) ,  Miki Genossar ,  Jeremy Stein

IPC: H03F1/32 ,  H03F3/189 ,  H04B1/40 ,  H03F3/24

Abstract: Systems, methods, and circuitries are disclosed to determine parameters for predistortion circuitry in a transceiver including a transmit chain and a receive chain. In one example, a method includes providing a training signal to a power amplifier on the transmit chain. A separation circuitry is controlled to provide an amplified training signal and a first feedback signal is received from the receive chain. The separation circuitry is controlled to output a modified amplified training signal and a second feedback signal is received from the receive chain. Parameters for the predistortion circuitry are determined based the first feedback signal and the second feedback signal.