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公开(公告)号：US20190250208A1
公开(公告)日：2019-08-15
申请号：US15892739
申请日：2018-02-09
Applicant: QUALCOMM Incorporated
Inventor： Vijayakumar DHANASEKARAN , Qubo ZHOU , Lennart Karl-Axel MATHE
CPC classification number: G01R31/2884 , G01R31/2856 , G01R31/2858 , G01R31/2896 , H01L22/32 , H01L22/34 , H01L23/585 , H01L28/20 , H01L29/92
Abstract: Various features relate to a test ring including an integrated circuit. The test ring is located around a periphery of the integrated circuit. The test ring includes a first terminal, a second terminal, and a first circuit element, wherein the first terminal is coupled to the first circuit element, and the first circuit element is coupled to the second terminal, wherein the first terminal, the first circuit element and the second terminal are coupled together in series.
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公开(公告)号：US20170054367A1
公开(公告)日：2017-02-23
申请号：US14830415
申请日：2015-08-19
Applicant: QUALCOMM Incorporated
Inventor： Vijayakumar DHANASEKARAN
IPC: H02M3/158
CPC classification number: H02M3/158 , H02M3/156 , H02M3/335 , H02M3/33561 , H02M2001/0003 , H02M2001/009
Abstract: A method and an apparatus for DC-to-DC conversion are provided. The apparatus is a DC-to-DC converter including a first feedback current control circuit coupled to a first voltage output of the DC-to-DC converter. The first feedback current control circuit is configured to generate a first control current based on a voltage difference between a first reference voltage and the first voltage output of the DC-to-DC converter. The apparatus further includes a constant charge comparator coupled to the first feedback current control circuit and configured to compare an integrated error signal to a threshold to generate a comparison result, the integrated error signal comprising an integration of a first error signal over time, the first error signal based on the first control current.
Abstract translation: 提供了一种DC-DC转换的方法和装置。 该装置是DC-DC转换器，其包括耦合到DC-DC转换器的第一电压输出的第一反馈电流控制电路。 第一反馈电流控制电路被配置为基于第一参考电压和DC-DC转换器的第一电压输出之间的电压差产生第一控制电流。 该装置还包括恒定电荷比较器，其耦合到第一反馈电流控制电路并且被配置为将积分误差信号与阈值进行比较以产生比较结果，所述积分误差信号包括随时间的积分的第一误差信号，第一 基于第一控制电流的误差信号。
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公开(公告)号：US20240179465A1
公开(公告)日：2024-05-30
申请号：US18060279
申请日：2022-11-30
Applicant: QUALCOMM Incorporated
CPC classification number: H04R5/04 , H03F1/3205 , H03F3/185 , H04R2420/07 , H04R2420/09
Abstract: A wireless device may include a plug that is shared by high speed data, analog audio signals, and power. Switches may be included on wires between the plug and the circuits that provide the high-speed data, analog audio signals and power to isolate those circuits from overvoltage conditions. Linearizer circuits may be included to provide gate driving signals to the switches, e.g., during transmission of analog audio signals. The linearizer circuits may include digital-to-analog converters to apply a gain factor to analog audio signals.
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公开(公告)号：US20230232155A1
公开(公告)日：2023-07-20
申请号：US17580505
申请日：2022-01-20
Applicant: QUALCOMM Incorporated
Inventor： Vijayakumar DHANASEKARAN
CPC classification number: H04R5/04 , H04R3/04 , H04R2420/03 , H03F3/45475
Abstract: An aspect of the disclosure relates to an apparatus, including an audio interface including first and second outputs; a crosstalk cancelling circuit including first and second inputs coupled to the first and second outputs of the audio interface, respectively; a first summer including a first input coupled to the first output of the audio interface and a second input coupled to a first output of the crosstalk cancelling circuit; a second summer including a first input coupled to the second output of the audio interface and a second input coupled to a second output of the crosstalk cancelling circuit; a first digital to analog converter (DAC) including an input coupled to an output of the first summer; and a second DAC including an input coupled to an output of the second summer.
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公开(公告)号：US20220376730A1
公开(公告)日：2022-11-24
申请号：US17323685
申请日：2021-05-18
Applicant: QUALCOMM Incorporated
Inventor： Kshitij YADAV , Vijayakumar DHANASEKARAN
Abstract: An aspect includes an apparatus including a first amplifier; a first field effect transistor (FET) including a first source coupled to an output of the first amplifier, and a first drain for coupling to a first load; and a first gate drive circuit including an input coupled to the output of the first amplifier and an output coupled to a first gate of the first FET. Another aspect includes a method including amplifying a first audio signal using a first audio amplifier to generate a first voltage; generating a first gate voltage based on the first voltage; applying the first gate voltage to a first gate of a first field effect transistor (FET) coupled between the first audio amplifier and a first audio transducer; and applying the first voltage to a first source of the first FET.
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Patent Agency Ranking
公开(公告)号：US20150296300A1
公开(公告)日：2015-10-15
申请号：US14251543
申请日：2014-04-11
Applicant: QUALCOMM Incorporated
Inventor： Vijayakumar DHANASEKARAN
CPC classification number: H04R5/033 , H03F1/0227 , H03F3/181 , H03F3/21 , H03G3/20 , H04R5/04 , H04R2420/05
Abstract: A radio frequency filtering circuit for audio headphones includes a switching power supply, audio amplifier section, one or more outputs from the audio amplifier section to one or more corresponding channels of the audio headphones, one or more L-C low pass filters arranged between the switching power supply and the audio amplifier section, and one or more L-C low pass filters arranged between the audio amplifier section and the one or more corresponding channels of the audio headphones. A method of filtering radio frequency signals for audio headphones includes providing an input voltage from a switching power supply section of a filtering circuit, passing the input voltage through an L-C low pass filter arranged between the switching power supply section and an audio amplifier section, and passing an output of the audio amplifier section through a second L-C low pass filter arranged between the audio amplifier section and an audio output to the headphones.
Abstract translation: 用于音频耳机的射频滤波电路包括开关电源，音频放大器部分，从音频放大器部分到音频耳机的一个或多个相应通道的一个或多个输出，一个或多个LC低通滤波器，布置在开关电源 电源和音频放大器部分，以及布置在音频放大器部分和音频耳机的一个或多个相应通道之间的一个或多个LC低通滤波器。 一种过滤用于音频耳机的射频信号的方法包括从滤波电路的开关电源部分提供输入电压，使输入电压通过布置在开关电源部分和音频放大器部分之间的LC低通滤波器，以及 通过布置在音频放大器部分和耳机的音频输出之间的第二LC低通滤波器使音频放大器部分的输出通过。
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公开(公告)号：US20240178663A1
公开(公告)日：2024-05-30
申请号：US18070414
申请日：2022-11-28
Applicant: QUALCOMM Incorporated
Inventor： Kshitij YADAV , Vijayakumar DHANASEKARAN , Khaled Mahmoud ABDELFATTAH ALY , Ramkumar SIVAKUMAR , Dongyang TANG , Chienchung YANG
IPC: H02H9/04
CPC classification number: H02H9/046
Abstract: An ESD trigger circuit is provided for protecting a pass transistor coupled to an integrated circuit terminal. The integrated circuit terminal couples through a diode to a voltage node. In response to an electrostatic shock at the integrated circuit terminal, the diode conducts charge to the voltage node to pulse a voltage of the voltage node. The ESD trigger circuit responds to the pulse of the voltage by coupling the voltage node to a gate of the pass transistor.
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公开(公告)号：US20230049081A1
公开(公告)日：2023-02-16
申请号：US17974030
申请日：2022-10-26
Applicant: QUALCOMM Incorporated
Inventor： Kshitij YADAV , Vijayakumar DHANASEKARAN
Abstract: An aspect includes an apparatus including a first amplifier; a first field effect transistor (FET) including a first source coupled to an output of the first amplifier, and a first drain for coupling to a first load; and a first gate drive circuit including an input coupled to the output of the first amplifier and an output coupled to a first gate of the first FET. Another aspect includes a method including amplifying a first audio signal using a first audio amplifier to generate a first voltage; generating a first gate voltage based on the first voltage; applying the first gate voltage to a first gate of a first field effect transistor (FET) coupled between the first audio amplifier and a first audio transducer; and applying the first voltage to a first source of the first FET.
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公开(公告)号：US20220059138A1
公开(公告)日：2022-02-24
申请号：US17000163
申请日：2020-08-21
Applicant: QUALCOMM Incorporated
Inventor： Kshitij YADAV , Vijayakumar DHANASEKARAN , Yan WANG
Abstract: An apparatus for power supply mode switching includes a first voltage regulator to output a first voltage, a second voltage regulator to output a second voltage, a third voltage regulator to output a third voltage, an electronic load, a first switch between the first voltage regulator and the electronic load, a second switch between the second voltage regulator and the electronic load, and a third switch between the third voltage regulator and the electronic load. And, a method for power supply mode switching includes supplying power to an electronic load with a first voltage; switching to a second voltage; maintaining coupling of the electronic load with the second voltage while a voltage across the electronic load is less than a reference voltage; and switching to a third voltage when the voltage is greater than or equal to the reference voltage and the third voltage is less than the second voltage.
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公开(公告)号：US20180352321A1
公开(公告)日：2018-12-06
申请号：US15613871
申请日：2017-06-05
Applicant: QUALCOMM Incorporated
Inventor： Jingxue LU , Vijayakumar DHANASEKARAN , Meysam AZIN , Arash MASHAYEKHI , Kshitij YADAV
CPC classification number: H04R1/1091 , H03F1/26 , H03F3/183 , H03F3/187 , H03F3/2173 , H03F3/45475 , H03F3/68 , H03F2200/03 , H04R1/06
Abstract: An example apparatus includes an output jack including a ground pole and a power output pole, a power supply circuit configured to generate a power signal, a coupler circuit operably coupled to the ground pole and the power output pole of the output jack, such that the coupler circuit is configured to couple the power signal with a noise signal on the ground pole to generate a combined output signal on the power output pole.
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