公开(公告)号：US11843387B1

公开(公告)日：2023-12-12

申请号：US17395234

申请日：2021-08-05

Applicant: Apple Inc.

Inventor： Susan A. Thompson ,  Anup K. Sharma ,  Christopher G Zeleznik ,  Harish Venkataraman

IPC: H03L7/085 ,  H03L7/081 ,  H05B47/10

CPC classification number: H03L7/085 ,  H03L7/081 ,  H05B47/10

Abstract: An optoelectronic system includes a transmit side and a receive side. The transmit side and the receive side each include an oversampled phase locked loop configured to receive a decimated system clock signal. Each phase-locked loop is configured to output a high frequency sampling clock signal that, in the case of the transmit side, may be leveraged to generate an arbitrary current waveform that, in turn, can be delayed by a delay-locked loop before being applied to a current-controlled light emitting element. The receive side can generate a clock signal at the same high frequency as the transmit side and can be configured to trigger a reset of the transmit side so that the high frequency clock signals between the transmit and receive sides are synchronized.

公开(公告)号：US20220069545A1

公开(公告)日：2022-03-03

申请号：US17378711

申请日：2021-07-18

Applicant: Apple Inc.

Inventor： Harish Venkataraman ,  Chinhan Lin ,  Fei Tan ,  Ido Luft ,  Moshe Laifenfeld ,  Susan A. Thompson

IPC: H01S5/042 ,  H03K17/687

Abstract: An optoelectronic device includes a laser diode, a driver and a reverse-bias circuit. The laser diode has a first terminal and a second terminal. The driver is coupled to drive current pulses through the laser diode between the first and second terminals. The reverse-bias circuit is configured to reverse-bias the laser diode during time intervals derived from the current pulses.

公开(公告)号：US11422207B2

公开(公告)日：2022-08-23

申请号：US16584859

申请日：2019-09-26

Applicant: Apple Inc.

Inventor： Jian Guo ,  Harish Venkataraman

IPC: G01R33/00 ,  G01V3/10

Abstract: A configurable AC/DC readout architecture that can be operated in an AC measurement mode or a DC measurement mode is disclosed. The configurable AC/DC architecture can utilize shared circuitry such as amplifiers and analog-to-digital converters (ADCs). The configurable AC/DC readout can be used other sensor configurations where both AC and DC measurement signals can captured and require readout and conversion to digital signals. The configurable AC/DC readout architecture can include a filter configured to filter out a DC signal component in the AC measurement mode. The configurable AC/DC readout architecture can include a bypass witch to bypass the filter in the DC measurement mode. A programmable gain amplifier can adjust the signal amplitude of DC or AC signals to allow use of a shared analog-to-digital converter.

公开(公告)号：US11876557B1

公开(公告)日：2024-01-16

申请号：US17379799

申请日：2021-07-19

Applicant: Apple Inc.

Inventor： Harish Venkataraman ,  Cristiano L. Niclass ,  Susan A. Thompson

IPC: H04B10/079 ,  H04L1/00

CPC classification number: H04B10/07955 ,  H04L1/0016

Abstract: An electronic device includes an optical transmitter, an optical receiver, a memory, an optical transmitter controller, and an optical receiver controller. The memory is configured to store an indicator of a next pulse repetition interval (PRI) and a set of parameters associated with operating the optical transmitter in accordance with the next PRI. The optical transmitter controller is configured to retrieve the indicator of the next PRI in response to a trigger signal; retrieve, using the indicator of the next PRI, the set of parameters; and operate the optical transmitter in accordance with the set of parameters. The optical receiver controller is configured to operate the optical receiver; update the indicator of the next PRI stored in the memory; and provide the trigger signal to the optical transmitter controller.

公开(公告)号：US11729880B1

公开(公告)日：2023-08-15

申请号：US17395304

申请日：2021-08-05

Applicant: Apple Inc.

Inventor： Susan A. Thompson ,  Harish Venkataraman ,  Yazan Z. Alnahhas

IPC: H05B45/305 ,  H05B45/31 ,  H04B10/516 ,  H04B10/50 ,  H01S5/026

CPC classification number: H05B45/305 ,  H01S5/026 ,  H04B10/502 ,  H04B10/516

Abstract: An arbitrary current waveform generator operates by oversampling an input clock signal, and decimating the oversampled clock signal to a decimated clock signal. The oversampled clock signal can be provided as a clock signal to a shift register preloaded with digital values corresponding to samples of a selected waveform to provide as output, and the decimated clock signal can be used to maintain phase synchronization with the input clock signal. Digital output of the shift register is provided to a digital to analog converter, output from which may be used to drive a current-controlled electronic circuit element.

公开(公告)号：US11763472B1

公开(公告)日：2023-09-19

申请号：US17200832

申请日：2021-03-14

Applicant: Apple Inc.

Inventor： Yazan Z. Alnahhas ,  Harish Venkataraman

IPC: G06T7/521 ,  G01S17/894

CPC classification number: G06T7/521 ,  G01S17/894 ,  G06T2207/10028

Abstract: Apparatus for optical sensing includes an illumination assembly, which directs first optical radiation toward a target scene over a first range of angles and second optical radiation over at least one second range of angles, which is smaller than and contained within the first range, while modulating the optical radiation with a carrier wave having at least one predetermined carrier frequency. A detection assembly includes an array of sensing elements, which output respective signals in response to the first and the second optical radiation. Processing circuitry drives the illumination assembly to direct the first and the second optical radiation toward the target scene in alternation, and processes the signals output by the sensing elements in response to the first optical radiation in order to compute depth coordinates of points in the target scene, while correcting the computed depth coordinates in response to the second optical radiation.

公开(公告)号：US20220350026A1

公开(公告)日：2022-11-03

申请号：US17863412

申请日：2022-07-13

Applicant: Apple Inc.

Inventor： Moshe Laifenfeld ,  Harish Venkataraman ,  Cristiano L Niclass ,  Doron Shinbox ,  Shingo Mandai ,  Susan A. Thompson

IPC: G01S17/894 ,  G01S17/10 ,  G01S7/481 ,  G01S7/4865 ,  G01S7/4863 ,  G01S7/484

Abstract: Sensing apparatus includes a radiation source, which emits pulses of optical radiation toward multiple points in a target scene. A receiver receives the optical radiation that is reflected from the target scene and outputs signals that are indicative of respective times of flight of the pulses to and from the points in the target scene. Processing and control circuitry selects a first pulse repetition interval (PRI), a second PRI, greater than the first PRI, and a third PRI, greater than the second PRI, from a permitted range of PRIs, drives the radiation source to emit sequences of the pulses at the first PRI, the second PRI, and the third PRI, and processes the signals output by the receiver in response to the first, second, and third sequences of the pulses in order to compute respective depth coordinates of the points in the target scene.