公开(公告)号：US20170187336A1

公开(公告)日：2017-06-29

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

IPC: H03F1/34 ,  H03F3/21 ,  H03F3/45 ,  H03F3/183

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.

公开(公告)号：US09385649B2

公开(公告)日：2016-07-05

申请号：US14290665

申请日：2014-05-29

Applicant: QUALCOMM INCORPORATED

Inventor： Le Wang ,  Arash Mehrabi

IPC: H03K3/26 ,  H03B5/04 ,  H03B5/20 ,  H04B5/04 ,  H03K3/30 ,  H03K3/0231 ,  H03K4/50

CPC classification number: H03B5/04 ,  H03B5/20 ,  H03K3/0231 ,  H03K3/30 ,  H03K4/50 ,  H04B5/04

Abstract: Cancelling a delay in a comparator of an RC oscillator configured to generate a clock pulse, including: selectively coupling a plurality of current sources to a first capacitor, a second capacitor, and a resistor, wherein the plurality of current source charge and discharge the first capacitor and the second capacitor, and charge the resistor; charging the first capacitor at a higher rate during a first phase of the clock pulse than a second phase of the clock pulse, and charging the second capacitor at a higher rate during a third phase of the clock pulse than a fourth phase of the clock pulse; and generating the clock pulse by enabling the comparator to compare a voltage on the first or second capacitor with a voltage on the resistor.

Abstract translation: 取消被配置为产生时钟脉冲的RC振荡器的比较器中的延迟，包括：选择性地将多个电流源耦合到第一电容器，第二电容器和电阻器，其中所述多个电流源对第一 电容器和第二电容器，并对电阻充电; 在时钟脉冲的第一相位期间以比时钟脉冲的第二相位更高的速率对第一电容器充电，并且在时钟脉冲的第三相位期间以比时钟脉冲的第四相位更高的速率对第二电容器充电 ; 并通过使比较器将第一或第二电容器上的电压与电阻器上的电压进行比较来产生时钟脉冲。

公开(公告)号：US09380388B2

公开(公告)日：2016-06-28

申请号：US13629855

申请日：2012-09-28

Applicant: QUALCOMM Incorporated

Inventor： Seyfollah S Bazarjani ,  Arash Mehrabi

IPC: G06F17/00 ,  H04R5/04 ,  H04S1/00

CPC classification number: H04R5/04 ,  H04S1/00 ,  H04S1/005

Abstract: Techniques for removing crosstalk from a system, e.g., an audio system, having first and second (e.g., left and right) channels. In an aspect, first and second output voltages of corresponding first and second amplifiers are sampled during a calibration mode, in which one of the amplifiers is driven with a reference voltage, and the output of the other of the amplifiers is configured to have a high impedance. The sampled first and second output voltages may be digitized for processing by a processor to estimate a crosstalk removal function. The crosstalk removal function may then be multiplied with the input signals and added in a cross-channel manner to the first and second input signals prior to amplification to remove crosstalk from the system. In certain aspects, multiple reference voltages may be applied during the calibration mode to improve the estimate of the crosstalk removal function.

Abstract translation: 用于从具有第一和第二（例如左和右）通道的系统（例如音频系统）去除串扰的技术。 在一个方面，在校准模式期间对相应的第一和第二放大器的第一和第二输出电压进行采样，其中放大器之一以参考电压驱动，另一个放大器的输出被配置为具有高 阻抗。 采样的第一和第二输出电压可被数字化以供处理器处理以估计串扰消除功能。 然后可以将串扰消除功能与输入信号相乘，并且在放大之前以交叉通道方式添加到第一和第二输入信号以从系统中去除串扰。 在某些方面，可以在校准模式期间施加多个参考电压以改善串扰消除功能的估计。

公开(公告)号：US09103866B2

公开(公告)日：2015-08-11

申请号：US13675995

申请日：2012-11-13

Applicant: QUALCOMM Incorporated

Inventor： Arash Mehrabi

IPC: G01R31/00 ,  H01R13/66 ,  G01R31/04 ,  H01R13/70 ,  H01R13/703 ,  H01R24/58 ,  H04R5/04 ,  H04M1/725 ,  H01R107/00 ,  H04M1/60

CPC classification number: G01R31/04 ,  H01R13/70 ,  H01R13/7031 ,  H01R24/58 ,  H01R2107/00 ,  H01R2201/16 ,  H04M1/6058 ,  H04M1/72527 ,  H04R5/04 ,  H04R2420/05

Abstract: A particular apparatus includes a receptacle having a first pin configured to contact a tip region of the device plug at a first location when the device plug is inserted into the receptacle. The first location may be located between a midpoint of the tip region and a tip of the device plug. The receptacle further includes a second pin configured to contact a second region of the device plug at a second location. The receptacle further includes a third pin configured to contact a third region of the device plug at a third location. The receptacle further includes a fourth pin configured to contact a fourth region of the device.

Abstract translation: 特定装置包括具有第一销的插座，该第一插脚构造成当装置插头插入插座时在第一位置处接触装置插头的尖端区域。 第一位置可以位于尖端区域的中点和设备插头的尖端之间。 插座还包括第二引脚，其构造成在第二位置处接触设备插头的第二区域。 插座还包括构造成在第三位置处接触设备插头的第三区域的第三引脚。 插座还包括被配置为接触设备的第四区域的第四引脚。

公开(公告)号：US09438192B2

公开(公告)日：2016-09-06

申请号：US14242285

申请日：2014-04-01

Applicant: QUALCOMM Incorporated

Inventor： Wenchang Huang ,  Peter Jivan Shah ,  Meysam Azin ,  Arash Mehrabi

IPC: H03F1/02 ,  H03G3/00 ,  H03G1/00 ,  H03F3/45

CPC classification number: H03G3/008 ,  H03F3/45475 ,  H03F2200/129 ,  H03F2200/267 ,  H03F2203/45118 ,  H03F2203/45156 ,  H03F2203/45514 ,  H03G1/0088 ,  H03G3/001

Abstract: An apparatus includes an operational amplifier and a plurality of capacitors coupled to an input terminal of the operational amplifier and configured to be selectively coupled to receive one of an input voltage signal and an output voltage signal of the operational amplifier.

Abstract translation: 一种装置包括运算放大器和耦合到运算放大器的输入端的多个电容器，并被配置为选择性地耦合以接收运算放大器的输入电压信号和输出电压信号中的一个。

公开(公告)号：US20140314243A1

公开(公告)日：2014-10-23

申请号：US13900141

申请日：2013-05-22

Applicant: QUALCOMM Incorporated

Inventor： Arash Mehrabi

IPC: H04R3/00

CPC classification number: H04R3/002 ,  H04R29/001 ,  H04R2420/05

Abstract: A method and an apparatus are provided. The apparatus reduces noise in headphones due to a change in a current or a voltage in headphones while determining an impedance of the headphones. The apparatus generates a digital waveform that reduces noise in the headphones when applied for an impedance determination. The apparatus converts the digital waveform to an analog waveform. The apparatus applies the analog waveform to an input of the headphones while reducing the noise in the headphones due to the application of the analog waveform for the impedance determination. The apparatus determines the impedance of the headphones based on the applied analog waveform. A first derivative of the analog waveform may be continuous. In particular, the analog waveform may be “s” shaped. The digital waveform may be generated based on a ramp digital waveform. The ramp digital waveform may be generated based on a step digital waveform.

Abstract translation: 提供了一种方法和装置。 该装置在确定耳机的阻抗的同时，由于耳机中的电流或电压的变化而降低了耳机中的噪声。 该装置产生数字波形，当应用于阻抗确定时，其可减少耳机中的噪声。 该装置将数字波形转换为模拟波形。 该装置将模拟波形应用于耳机的输入，同时由于应用模拟波形用于阻抗确定，从而降低了耳机中的噪声。 该装置基于所应用的模拟波形确定耳机的阻抗。 模拟波形的一阶导数可以是连续的。 特别地，模拟波形可以是“s”形的。 可以基于斜坡数字波形来生成数字波形。 斜坡数字波形可以基于步进数字波形来生成。