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公开(公告)号：US20180269839A1
公开(公告)日：2018-09-20
申请号：US15986527
申请日：2018-05-22
Applicant: QUALCOMM Incorporated
Inventor： Arash Mehrabi , Zongyu Dong , Vijayakumar Dhanasekaran , Dongyang Tang , Chien-Chung Yang
CPC classification number: H03F1/34 , H03F1/0272 , H03F1/3211 , H03F3/183 , H03F3/21 , H03F3/45475 , H03F2200/153 , H03F2200/21 , H03F2203/45136 , H03F2203/45151 , H03F2203/45522 , H03F2203/45528 , H03F2203/45562 , H03F2203/45594
Abstract: An apparatus includes a reference voltage circuit having a bandgap input and a reference voltage output. The apparatus also includes a digital-to-analog converter (DAC) coupled to the reference voltage output and having a digital signal input. The apparatus includes an amplifier having a first input coupled to an output of the DAC. The first input is coupled to an output of the amplifier via a feedback resistor. The apparatus includes a resistor coupled to the reference voltage output and having a body terminal coupled to the output of the amplifier.
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公开(公告)号：US10003312B2
公开(公告)日：2018-06-19
申请号：US14841490
申请日：2015-08-31
Applicant: QUALCOMM Incorporated
Inventor： Vijayakumar Dhanasekaran
CPC classification number: H03F3/183 , H03F1/34 , H03F1/56 , H03F3/187 , H03F3/45071 , H03F3/45475 , H03F2200/03 , H03F2200/234 , H03F2200/387 , H03F2203/45136 , H03F2203/45521 , H03F2203/45522 , H03F2203/45528 , H04R3/00 , H04R2420/03 , H04R2420/05
Abstract: An apparatus includes a resistor having an input coupled to an output of an amplifier. The apparatus also includes a feedback circuit coupled to an output of the resistor and to an input of the amplifier. The feedback circuit includes a first component of a voltage divider.
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公开(公告)号：US20170277645A1
公开(公告)日：2017-09-28
申请号：US15080166
申请日：2016-03-24
Applicant: QUALCOMM Incorporated
Inventor： Meysam Azin , Vijayakumar Dhanasekaran , Hui-ya Liao Nelson , Bengt Stefan Gustavsson , Peter Jivan Shah
CPC classification number: G06F13/4022 , G06F13/4068 , H04B1/3805 , H04M1/0202
Abstract: An interface unit of a mobile device coupled to an auxiliary device, the interface unit including: a first plurality of switches configured for power delivery to the auxiliary device; at least one isolation unit coupled to the first plurality of switches, the at least one isolation unit configured to isolate the multiple signals and to prevent disruption of data communication between the mobile device and the auxiliary device; and a second plurality of switches configured for the data communication between the mobile device and the auxiliary device, the second plurality of switches configured to bypass the at least one isolation unit.
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14.发明申请REFERENCE AMPLIFIER COUPLED TO A VOLTAGE DIVIDER CIRCUIT TO PROVIDE FEEDBACK FOR AN AMPLIFIER 有权参考放大器耦合到电压分路器电路，为放大器提供反馈公开(公告)号：US20160020736A1
公开(公告)日：2016-01-21
申请号：US14334442
申请日：2014-07-17
Applicant: QUALCOMM Incorporated
Inventor： Vijayakumar Dhanasekaran
CPC classification number: H03F3/183 , H03F3/187 , H03F3/211 , H03F3/45071 , H03F3/45475 , H03F3/45941 , H03F2200/03 , H03F2200/156 , H03F2203/45116 , H03F2203/45512 , H03F2203/45521 , H03F2203/45528
Abstract: An apparatus includes a voltage divider circuit and a reference amplifier coupled to the voltage divider circuit. The reference amplifier is configured to provide a feedback voltage to input circuitry of an amplifier.
Abstract translation: 一种装置包括分压器电路和耦合到分压器电路的参考放大器。 参考放大器被配置为向放大器的输入电路提供反馈电压。
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公开(公告)号：US20150002228A1
公开(公告)日：2015-01-01
申请号：US14078050
申请日：2013-11-12
Applicant: QUALCOMM Incorporated
Inventor： Wenchang Huang , Vijayakumar Dhanasekaran
IPC: H03F1/30
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.
Abstract translation: 公开了一种具有改进的降噪功能的放大器。 在示例性实施例中，一种装置包括至少一个电容器，其配置成接收可调电流并产生相应的斜坡电压，该斜坡电压被配置为控制主放大器输出和辅助放大器输出之间的耦合。 该装置还包括至少一个比较器，配置成调整可调电流以产生具有选定的斜升或斜降电压特性的斜坡电压。
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Patent Agency Ranking
公开(公告)号：US20140167860A1
公开(公告)日：2014-06-19
申请号：US13720884
申请日：2012-12-19
Applicant: QUALCOMM INCORPORATED
Inventor： Vijayakumar Dhanasekaran
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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公开(公告)号：US11424720B2
公开(公告)日：2022-08-23
申请号：US16827280
申请日：2020-03-23
Applicant: QUALCOMM Incorporated
Inventor： Pradeep Silva , Ramkumar Sivakumar , Qubo Zhou , Xinwang Zhang , Hanil Lee , Dongyang Tang , Vijayakumar Dhanasekaran
Abstract: A power amplifier provides reduction of click and pop in audio applications. The power amplifier includes a first amplifier and an auxiliary amplifier. The auxiliary amplifier is used to ramp the power amplifier output from ground to an offset voltage to reduce the “click and pop” sound. The first amplifier and the auxiliary amplifier having a shared feedback loop. An output of the first amplifier and an output of the auxiliary amplifier may be switchably coupled to the shared feedback loop. A wave generator controls a switch to couple the first amplifier output or the auxiliary amplifier output to the shared feedback loop.
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公开(公告)号：US10194234B2
公开(公告)日：2019-01-29
申请号：US15613871
申请日：2017-06-05
Applicant: QUALCOMM Incorporated
Inventor： Jingxue Lu , Vijayakumar Dhanasekaran , Meysam Azin , Arash Mashayekhi , Kshitij Yadav
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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公开(公告)号：US20180374705A1
公开(公告)日：2018-12-27
申请号：US15632040
申请日：2017-06-23
Applicant: QUALCOMM Incorporated
Inventor： Vijayakumar Dhanasekaran , Ramkumar Sivakumar , Arash Mehrabi
IPC: H01L21/265 , H01L27/08 , H01L29/93 , H01L29/861 , H01L27/02 , H01L29/87 , H01L29/06
Abstract: A transient signal protection circuit includes an input node coupled to a signal line configured to carry an output signal from a first circuit to a second circuit, wherein the signal line is subject to experiencing an unwanted reverse signal from the second circuit to the first circuit. The transient signal protection circuit also includes a comparator module configured to output a clamping signal when it is determined that the unwanted reverse signal includes a value that falls outside an acceptable range of the first circuit; and a power switch coupled to the comparator module and configured to couple the input node to a sink node when the comparator module outputs the clamping signal.
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公开(公告)号：US09998077B2
公开(公告)日：2018-06-12
申请号：US15188364
申请日：2016-06-21
Applicant: QUALCOMM Incorporated
Inventor： Arash Mehrabi , Zongyu Dong , Vijayakumar Dhanasekaran , Dongyang Tang , Chien-Chung Yang
CPC classification number: H03F1/34 , H03F1/0272 , H03F1/3211 , H03F3/183 , H03F3/21 , H03F3/45475 , H03F2200/153 , H03F2200/21 , H03F2203/45136 , H03F2203/45151 , H03F2203/45522 , H03F2203/45528 , H03F2203/45562 , H03F2203/45594
Abstract: An apparatus includes an amplifier having a first input and a second input. A first feedback resistor is coupled to the first input and has a first body terminal coupled to a first bias terminal. A second feedback resistor is coupled to the second input and has a second body terminal coupled to a second bias terminal.
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