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公开(公告)号：EP2727240A1
公开(公告)日：2014-05-07
申请号：EP12735407.4
申请日：2012-06-29
Applicant: Qualcomm Incorporated
Inventor： DHANASEKARAN, Vijayakumar
IPC: H03F1/30
CPC classification number: H03F1/30
Abstract: An amplifier with high power supply rejection is disclosed. In an exemplary implementation, an amplifier includes a first stage configured to receive a signal to be amplified, a second stage comprising an input transistor coupled to the first stage, and further comprising at least one additional transistor, and a voltage regulator configured to received a first supply voltage and generate a regulated supply voltage, the first supply voltage coupled to the at least one additional transistor, the regulated supply voltage coupled to the first stage and the input transistor of the second stage to improve power supply noise rejection of the apparatus.
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公开(公告)号：WO2022040003A1
公开(公告)日：2022-02-24
申请号：PCT/US2021/045699
申请日：2021-08-12
Applicant: QUALCOMM INCORPORATED
Inventor： YADAV, Kshitij , DHANASEKARAN, Vijayakumar , WANG, Yan
IPC: G11C5/14 , G11C11/4074 , G11C16/30 , H02M3/156 , H02M3/158 , G06F1/30 , G06F1/3225 , G06F1/3287 , G06F1/26
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：WO2019156734A1
公开(公告)日：2019-08-15
申请号：PCT/US2018/064374
申请日：2018-12-07
Applicant: QUALCOMM INCORPORATED
Inventor： DHANASEKARAN, Vijayakumar , ZHOU, Qubo , MATHE, Lennart Karl-Axel
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：WO2015156976A1
公开(公告)日：2015-10-15
申请号：PCT/US2015/021542
申请日：2015-03-19
Applicant: QUALCOMM INCORPORATED
Inventor： DHANASEKARAN, Vijayakumar
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：WO2014100512A1
公开(公告)日：2014-06-26
申请号：PCT/US2013/076748
申请日：2013-12-19
Applicant: QUALCOMM INCORPORATED
Inventor： DHANASEKARAN, Vijayakumar
CPC classification number: H03F1/0227 , H03F3/3022 , H03F3/45183 , H03F3/45475 , H03F2200/408 , H03F2200/513
Abstract: Exemplary embodiments are directed to operating a multi-stage amplifier with low-voltage supply voltages. A multi-stage amplifier may include a first path of an amplifier output stage configured to convey an output signal if a first supply voltage is greater than a threshold voltage. The multi-stage amplifier may also include a second path of the amplifier output stage configured to convey the output signal if the first supply voltage is less than or equal to the threshold voltage.
Abstract translation: 示例性实施例涉及操作具有低电压电源电压的多级放大器。 多级放大器可以包括放大器输出级的第一路径，其被配置为在第一电源电压大于阈值电压时传送输出信号。 多级放大器还可以包括放大器输出级的第二路径，其被配置为在第一电源电压小于或等于阈值电压时传送输出信号。
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Patent Agency Ranking
公开(公告)号：EP4154369A1
公开(公告)日：2023-03-29
申请号：EP21733614.8
申请日：2021-05-21
Applicant: QUALCOMM INCORPORATED
Inventor： DHANASEKARAN, Vijayakumar
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公开(公告)号：EP3014765A1
公开(公告)日：2016-05-04
申请号：EP14738698.1
申请日：2014-06-18
Applicant: Qualcomm Incorporated
Inventor： HUANG, Wenchang , DHANASEKARAN, Vijayakumar
CPC classification number: H03F1/305 , H03F3/187 , H03F3/3022 , H03F3/72 , H03F2200/03 , H03F2200/381 , H03F2200/411 , H03F2200/453 , H03F2200/456 , H03F2203/45136 , H03F2203/7236 , H03G3/348
Abstract: An amplifier with improved noise reduction is disclosed. In an exemplary embodiment, an apparatus includes at least one capacitor configured to receive an adjustable current and generate a corresponding ramp voltage configured to control coupling between a main amplifier output and a secondary amplifier output. The apparatus also includes at least one comparator configured to adjust the adjustable current to generate the ramp voltage with selected ramp-up or ramp-down voltage characteristics.
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公开(公告)号：EP2489122A2
公开(公告)日：2012-08-22
申请号：EP10771289.5
申请日：2010-10-15
Applicant: Qualcomm Incorporated
Inventor： DHANASEKARAN, Vijayakumar
IPC: H03F1/30
CPC classification number: H03F1/308 , H03F3/3027 , H03F2200/447
Abstract: Techniques for generating a bias voltage for a class AB amplifier having first and second active transistors. In an exemplary embodiment, a diode-coupled first transistor supports a first current, and the gate voltage of the first transistor is coupled to the gate voltage of the first active transistor. The first current is split into a second current and a first auxiliary current supported by a second transistor, which is biased at a desired common-mode output voltage of the class AB amplifier. The first auxiliary current is further combined with a third current to be supported by a third transistor, with the third transistor configured to replicate the characteristic of the second active transistor. Further techniques are provided for setting the drain voltage of the third transistor to be close to the common-mode output voltage. The techniques described herein may be used to provide a bias voltage for the NMOS and/or PMOS active transistors in a class AB amplifier.
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公开(公告)号：WO2023009307A1
公开(公告)日：2023-02-02
申请号：PCT/US2022/036845
申请日：2022-07-12
Applicant: QUALCOMM INCORPORATED
IPC: G06F13/38
Abstract: An aspect relates to an apparatus including a first pair of switching devices configured to selectively couple an application processor to a Universal Serial Bus (USB) differential data transmission lines; a USB host port connector coupled to the USB differential data transmission lines; a second pair of switching devices configured to selectively couple an audio circuit to the USB differential data transmission lines; and an equalizer including differential terminals coupled to the USB differential data transmission lines, respectively.
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公开(公告)号：WO2022245518A1
公开(公告)日：2022-11-24
申请号：PCT/US2022/026790
申请日：2022-04-28
Applicant: QUALCOMM INCORPORATED
Inventor： YADAV, Kshitij , DHANASEKARAN, Vijayakumar
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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