MEASUREMENT CIRCUIT, MEASUREMENT INSTRUMENT, AND VECTOR NETWORK ANALYZER

    公开(公告)号:US20240281019A1

    公开(公告)日:2024-08-22

    申请号:US18170100

    申请日:2023-02-16

    IPC分类号: G06F1/02 G06F1/03 G06F1/08

    CPC分类号: G06F1/022 G06F1/0328 G06F1/08

    摘要: The measurement circuit includes a clock input, a frequency converter circuit, and a first signal generator circuit. The clock input is configured to receive a reference clock signal. The first signal generator circuit includes a first clock generator circuit configured to generate a first clock signal having an adaptable frequency based on the reference clock signal. The first signal generator circuit further includes a first direct digital synthesizer (DDS) circuit configured to generate a local oscillator (LO) signal based on the first clock signal and based on an adaptable frequency tuning word (FTW) of the first DDS circuit. The adaptable frequency of the first clock signal and the adaptable FTW of the first DDS circuit are configured such that an IF signal is free of spurs emitted by the first DDS circuit at least in a predetermined frequency band.

    Consumer device firmware updating via HDMI

    公开(公告)号:US12067384B2

    公开(公告)日:2024-08-20

    申请号:US17827139

    申请日:2022-05-27

    申请人: Vizio, Inc.

    发明人: W. Leo Hoarty

    IPC分类号: G06F8/65 G06F1/08 G06F1/12

    CPC分类号: G06F8/65 G06F1/08 G06F1/12

    摘要: Systems and methods for updating firmware in an audio device, such as a soundbar, operatively connected to a Smart TV, are shown and described. Firmware update data is transmitted to the audio device via an audio return channel (ARC) of an HDMI cable. In certain of the systems, the firmware update data is transmitted to the audio device when no audio is being transmitted to or played by the audio device. In other systems, the firmware update data and real-time audio data are multiplexed by the Smart TV and are sent to the audio device via the audio return channel for subsequent demultiplexing and playback of the audio.

    DYNAMIC CONFIGURATION OF SPUR CANCELLATION
    24.
    发明公开

    公开(公告)号:US20240275369A1

    公开(公告)日:2024-08-15

    申请号:US18647662

    申请日:2024-04-26

    申请人: Apple Inc.

    IPC分类号: H03K5/1252 G06F1/08 G06F13/40

    摘要: Embodiments relate to updating spur cancellation at a victim integrated circuit (IC) in accordance with dynamic changes in the operating frequencies of an aggressor IC. The aggressor IC changes its operating frequencies at an update time that is determined in advance. The update time and the changes to the operating frequencies are shared with the victim IC. The victim IC dynamically updates the relationships between frequencies of local clock signals for the victim IC and the aggressor IC. The victim IC generates a spur cancellation parameter based on the updated relationships of local clock frequencies, the update time and the changes to the operating frequencies of the aggressor IC, and configures a spur cancellation circuit. In this way, the victim IC may perform effective spur cancellation despite changes in the operating frequencies of the aggressor IC and deviation of the local clock frequencies.

    Signal generator, method of generating signal, and display device

    公开(公告)号:US20240264628A1

    公开(公告)日:2024-08-08

    申请号:US18637461

    申请日:2024-04-17

    发明人: SE-BYUNG CHAE

    摘要: A signal generator may include a reference horizontal synchronization signal generation block which generates reference horizontal synchronization signals based on a number of clock signals per a horizontal time, a frame clock calculation block which calculates a first frame clock number based on a number of the clock signals per the horizontal time, a frame clock comparation block which calculates a clock offset by comparing the first frame clock number and a second frame clock number generated based on a number of the clock signals per a frame time, a clock distribution block which generates horizontal synchronization signals by distributing a number of the clock signals corresponding to the clock offset to the reference horizontal synchronization signals, and a vertical synchronization signal generation block which generates a vertical synchronization signal based on the horizontal synchronization signals.

    Broadband Frequency Multiplier with Harmonic Suppression

    公开(公告)号:US20240223168A1

    公开(公告)日:2024-07-04

    申请号:US18148845

    申请日:2022-12-30

    IPC分类号: H03K5/00 G06F1/08 H03H7/01

    摘要: Described embodiments include a circuit having a quadrature phase generator circuit having differential generator inputs, in-phase differential generator outputs and quadrature-phase differential generator outputs. A first frequency multiplier circuit has first differential multiplier inputs and a first multiplier output, wherein the first differential multiplier inputs are coupled to the in-phase differential generator outputs. A second frequency multiplier circuit has second differential multiplier inputs and a second multiplier output. The second multiplier differential inputs are coupled to the quadrature-phase differential generator outputs. A transformer includes a primary inductor and a secondary inductor, wherein the primary inductor is coupled between the first and second multiplier outputs, and the second inductor is coupled between an output voltage terminal and a ground terminal.

    Clock Disciplining and Synchronizing
    30.
    发明公开

    公开(公告)号:US20240219954A1

    公开(公告)日:2024-07-04

    申请号:US18439593

    申请日:2024-02-12

    发明人: Aaron Foo

    IPC分类号: G06F1/08 G06F1/14

    CPC分类号: G06F1/08 G06F1/14

    摘要: An embodiment may involve receiving a signal indicative of an edge of a reference clock, wherein the reference clock has a fixed clock period, wherein a hardware clock signal generator ticks at a variable clock period, and wherein a local time value is increased by a local time increment on ticks of the hardware clock signal generator; reading the local time value and writing it to a memory as a current time value; determining a difference between the current time value and a previous time value that was written to the memory in response to receiving a previous signal from the reference clock; based on the difference, determining an adjustment to the local time increment so that the local time value increases at a rate that is closer to that of the reference clock; and modifying the local time increment by the adjustment.