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1. 发明公开

EP2727240A1 AMPLIFIER WITH HIGH POWER SUPPLY NOISE REJECTION 有权
标题翻译：高功率电源噪声减小放大器
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
申请人： Qualcomm Incorporated
发明人： DHANASEKARAN, Vijayakumar
IPC分类号： H03F1/30
CPC分类号： H03F1/30
摘要： 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.

2. 发明公开

EP4154369A1 OVERVOLTAGE PROTECTION SCHEME FOR CONNECTOR PORTS 审中-实审
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
申请人： QUALCOMM INCORPORATED
发明人： DHANASEKARAN, Vijayakumar
IPC分类号： H02H3/20 , G06F13/42 , H01R13/66 , H02H9/04

3. 发明公开

EP3014765A1 AMPLIFIER WITH IMPROVED NOISE REDUCTION 审中-公开
标题翻译：具有改进的降噪放大器
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
申请人： Qualcomm Incorporated
发明人： HUANG, Wenchang , DHANASEKARAN, Vijayakumar
IPC分类号： H03F1/30 , H03F3/187 , H03F3/72 , H03F3/30 , H03G3/34
CPC分类号： H03F1/305 , H03F3/187 , H03F3/3022 , H03F3/72 , H03F2200/03 , H03F2200/381 , H03F2200/411 , H03F2200/453 , H03F2200/456 , H03F2203/45136 , H03F2203/7236 , H03G3/348
摘要： 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.

4. 发明公开

EP2489122A2 AMPLIFIER BIAS TECHNIQUES 有权
标题翻译：闭路设置一个放大器
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
申请人： Qualcomm Incorporated
发明人： DHANASEKARAN, Vijayakumar
IPC分类号： H03F1/30
CPC分类号： H03F1/308 , H03F3/3027 , H03F2200/447
摘要： 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.

5. 发明公开

EP4342083A1 AUDIO NON-LINEARITY CANCELLATION FOR SWITCHES FOR AUDIO AND OTHER APPLICATIONS 审中-实审
公开(公告)号：EP4342083A1
公开(公告)日：2024-03-27
申请号：EP22723928.2
申请日：2022-04-28
申请人： QUALCOMM INCORPORATED
发明人： YADAV, Kshitij , DHANASEKARAN, Vijayakumar
IPC分类号： H03F3/187 , H03K17/00 , H03K17/06

6. 发明公开

EP4200848A1 LOW-GLITCH SWITCH CONTROL FOR MODE SWITCHING OF MEMORY CELLS 审中-实审
公开(公告)号：EP4200848A1
公开(公告)日：2023-06-28
申请号：EP21766282.4
申请日：2021-08-12
申请人： QUALCOMM INCORPORATED
发明人： YADAV, Kshitij , DHANASEKARAN, Vijayakumar , WANG, Yan
IPC分类号： G11C5/14 , G11C11/4074 , G11C16/30 , H02M3/156 , H02M3/158 , G06F1/30 , G06F1/3225 , G06F1/3287 , G06F1/26

7. 发明授权

EP2489122B1 AMPLIFIER BIAS TECHNIQUES 有权
标题翻译：闭路设置一个放大器
公开(公告)号：EP2489122B1
公开(公告)日：2014-06-18
申请号：EP10771289.5
申请日：2010-10-15
申请人： Qualcomm Incorporated
发明人： DHANASEKARAN, Vijayakumar
IPC分类号： H03F1/30 , H03F3/30
CPC分类号： H03F1/308 , H03F3/3027 , H03F2200/447

8. 发明公开

EP4377807A1 UNIVERSAL SERIAL BUS (USB) HOST DATA SWITCH WITH INTEGRATED EQUALIZER 审中-公开
公开(公告)号：EP4377807A1
公开(公告)日：2024-06-05
申请号：EP22753828.7
申请日：2022-07-12
申请人： QUALCOMM INCORPORATED
发明人： DHANASEKARAN, Vijayakumar , ABDELFATTAH ALY, Khaled Mahmoud
IPC分类号： G06F13/38
CPC分类号： G06F13/385

9. 发明公开

EP3433935A1 MOBILE DEVICE WITH MULTIPLE COMMUNICATION CAPABILITIES 审中-公开
公开(公告)号：EP3433935A1
公开(公告)日：2019-01-30
申请号：EP17708375.5
申请日：2017-02-16
申请人： Qualcomm Incorporated
发明人： AZIN, Meysam , DHANASEKARAN, Vijayakumar , NELSON, Hui-ya Liao , GUSTAVSSON, Bengt Stefan , SHAH, Peter Jivan
IPC分类号： H04B1/3805

10. 发明公开

EP3130076A1 FM FILTERING FOR CLASS-G/H HEADPHONES 审中-公开
标题翻译： FM滤波器适用于G级/ H级耳机
公开(公告)号：EP3130076A1
公开(公告)日：2017-02-15
申请号：EP15714359.5
申请日：2015-03-19
申请人： Qualcomm Incorporated
发明人： DHANASEKARAN, Vijayakumar
IPC分类号： H03F3/181 , H03F3/217 , H03F3/45 , H03F3/68
CPC分类号： H04R5/033 , H03F1/0227 , H03F3/181 , H03F3/21 , H03G3/20 , H04R5/04 , H04R2420/05
摘要： 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.
摘要翻译：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。一种滤除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，以及将音频放大器部分的输出通过布置在音频放大器部分和音频输出之间的第二LC低通滤波器传递给耳机。

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