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95 条记录 (耗时 0.023 秒)

    System for profiling power using ton pulses
    52.
    发明授权
    System for profiling power using ton pulses 有权

    公开(公告)号：US12074519B2

    公开(公告)日：2024-08-27

    申请号：US18336746

    申请日：2023-06-16

    申请人： Ambiq Micro, Inc.

    发明人： Ivan Bogue ,  Jesse Coulon ,  Andre Belanger

    IPC分类号： H02M3/157 ,  G06F1/26 ,  H02M3/158

    CPC分类号： H02M3/157 ,  G06F1/26 ,  H02M3/158

    摘要： A system for determining a power requirement for a device powered by a buck converter on a system on chip based on Time on pulses (Ton) is disclosed. A buck converter supplies output voltage to enable the device. The buck converter is driven by a Ton pulse generator generating Ton pulses to control charging of a load capacitor. A counter counts the Ton pulses during the supply of output voltage while the device is enabled. A controller is coupled to the counter and the buck converter. The controller determines the power requirement for the device based on the count of the Ton pulses. The power requirement may be used to adjust the trim value to change the width of the Ton pulses for greater energy efficiency.

    Voice activity detection using zero crossing detection
    53.
    发明授权
    Voice activity detection using zero crossing detection 有权

    公开(公告)号：US11790931B2

    公开(公告)日：2023-10-17

    申请号：US17081378

    申请日：2020-10-27

    申请人： Ambiq Micro, Inc.

    发明人： Roger David Serwy

    IPC分类号： G10L25/09 ,  G10L15/10 ,  G10L15/02

    CPC分类号： G10L25/09 ,  G10L15/02 ,  G10L15/10

    摘要： A first VAD system outputs a pulse stream for zero crossings in an audio signal. The pulse density of the pulse stream is evaluated to identify speech. The audio signal may have noise added to it before evaluating zero crossings. A second VAD system rectifies each audio signal sample and processes each rectified sample by updating a first statistic and evaluating the rectified sample per a first threshold condition that is a function of the first statistic. Rectified samples meeting the first threshold condition may be used to update a second statistic and the rectified sample evaluated per a second threshold condition that is a function of the second statistic. Rectified samples meeting the second threshold condition may be used to update a third statistic. The audio signal sample may be selected as speech if the second statistic is less than a downscaled third statistic.

    LOW POWER AND WIDE DYNAMIC RANGE ANALOG-TO-DIGITAL CONVERTER
    54.
    发明公开
    LOW POWER AND WIDE DYNAMIC RANGE ANALOG-TO-DIGITAL CONVERTER 审中-公开

    公开(公告)号：US20230275597A1

    公开(公告)日：2023-08-31

    申请号：US18053601

    申请日：2022-11-08

    申请人： Ambiq Micro, Inc.

    发明人： Yousof Mortazavi ,  Roger Serwy

    IPC分类号： H03M1/12 ,  H03M1/18 ,  H03M1/46

    CPC分类号： H03M1/1205 ,  H03M1/183 ,  H03M1/462

    摘要： A low power high bandwidth analog to digital converter system is disclosed. A first analog signal input receives an input signal. A first programmable gain amplifier receives the input signal. An analog to digital converter (ADC) is coupled to the output of the first programmable gain amplifier and samples the input signal for conversion to a digital signal. A controller is coupled to the ADC and the first programmable gain amplifier. The controller selects and enables either a reduced power mode or a power up mode for the first programmable gain amplifier and the ADC. The power up mode is selected and enabled when the input signal is to be sampled to operate the first programmable gain amplifier and the ADC to sample the input signal.

    Buck converter with inductor sensor
    56.
    发明授权
    Buck converter with inductor sensor 有权

    公开(公告)号：US10897203B2

    公开(公告)日：2021-01-19

    申请号：US16375391

    申请日：2019-04-04

    申请人： Ambiq Micro, Inc.

    发明人： Ivan Bogue ,  Yousof Mortazavi

    IPC分类号： H02M3/156 ,  H02M3/158 ,  G05F1/56 ,  H03K17/0814 ,  H02M1/00

    摘要： A buck converter may operate in a low power mode or a high power mode based on a power requirements of a load. In the high power mode, modifications to increase frequency response include a higher polling frequency for a comparator, a lower impedance divider in a feedback circuit, a higher biasing current for a comparator, and larger switches for providing current to a reactive step-down circuit of the buck converter. In the low power mode these modifications are reversed. The buck converter may make use of an improved strong arm comparator and a circuit for sensing presence of an inductor in the reactive step-down circuit.

    Buck converter with power saving mode
    57.
    发明授权
    Buck converter with power saving mode 有权

    公开(公告)号：US10897199B2

    公开(公告)日：2021-01-19

    申请号：US16375345

    申请日：2019-04-04

    申请人： Ambiq Micro, Inc.

    发明人： Ivan Bogue ,  Yanning Lu

    IPC分类号： H02M3/158 ,  H02M1/08 ,  H02M3/157 ,  H02M1/00

    摘要： A buck converter is disclosed that may operate in a low power mode or a high power mode based on a power requirements of a load. In the high power mode, modifications to increase frequency response include a higher polling frequency for a comparator, a lower impedance divider in a feedback circuit, a higher biasing current for a comparator, and larger switches for providing current to a reactive step-down circuit of the buck converter. In the low power mode these modifications are reversed. The buck converter may make use of an improved strong arm comparator and a circuit for sensing presence of an inductor in the reactive step-down circuit.

    Strong arm comparator
    60.
    发明授权
    Strong arm comparator 有权

    公开(公告)号：US10601322B1

    公开(公告)日：2020-03-24

    申请号：US16375434

    申请日：2019-04-04

    申请人： Ambiq Micro, Inc.

    发明人： Ivan Bogue

    IPC分类号： H02M3/158 ,  H02M1/00

    摘要： A buck converter is disclosed that may operate in a low power mode or a high power mode based on a power requirements of a load. In the high power mode, modifications to increase frequency response include a higher polling frequency for a comparator, a lower impedance divider in a feedback circuit, a higher biasing current for a comparator, and larger switches for providing current to a reactive step-down circuit of the buck converter. In the low power mode these modifications are reversed. The buck converter may make use of an improved strong arm comparator and a circuit for sensing presence of an inductor in the reactive step-down circuit.