公开(公告)号：EP3127236A1

公开(公告)日：2017-02-08

申请号：EP15708667.9

申请日：2015-02-26

Applicant: Qualcomm Incorporated

Inventor： AZIN, Meysam ,  MEHRABI, Arash ,  HUANG, Wenchang

IPC: H03F3/00 ,  H03F3/181 ,  H03F3/187 ,  H03H19/00

CPC classification number: H03F3/185 ,  H03F3/005 ,  H03F3/181 ,  H03F3/187 ,  H03F3/45179 ,  H03F3/45183 ,  H03F2200/03 ,  H03F2203/45016 ,  H03F2203/45514 ,  H03H19/004 ,  H04R3/00

Abstract: An integrated DC blocking amplifier circuit (100), including: an operational amplifier (110) configured in a differential amplifier; and at least first and second two-stage switched-capacitor circuits, each two stage switched-capacitor circuit including a first-stage circuit(140,144) and a second-stage circuit (142,146), wherein the first two-stage switched capacitor circuit is connected to a positive feedback path of the operational amplifier and the second two-stage switched capacitor circuit is connected to a negative feedback path of the operational amplifier, wherein the first-stage circuit is switched at a relatively low switching frequency, while the second-stage circuit is switched at a relatively high switching frequency.

Abstract translation: 一种集成直流阻塞放大器电路，包括：配置在差分放大器中的运算放大器; 以及至少第一和第二两级开关电容器电路，每个两级开关电容器电路包括第一级电路和第二级电路，其中所述第一两级开关电容器电路连接到正侧反馈 运算放大器和第二两级开关电容电路的路径连接到运算放大器的负侧反馈路径，其中第一级电路以相对低的开关频率切换，而第二级电路被切换 在相对高的开关频率。

公开(公告)号：EP3127237A1

公开(公告)日：2017-02-08

申请号：EP15714360.3

申请日：2015-03-19

Applicant: Qualcomm Incorporated

Inventor： HUANG, Wenchang ,  SHAH, Peter Jivan ,  AZIN, Meysam ,  MEHRABI, Arash

IPC: H03G1/00 ,  H03G3/00

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，并且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之一。

公开(公告)号：EP3134970A1

公开(公告)日：2017-03-01

申请号：EP15722298.5

申请日：2015-04-14

Applicant: Qualcomm Incorporated

Inventor： AZIN, Meysam ,  HUANG, Wenchang ,  WANG, Le

IPC: H03K5/24 ,  H03K17/06 ,  H03F3/45

CPC classification number: H04L25/0276 ,  H03F3/245 ,  H03F3/45475 ,  H03F2203/45514 ,  H03K5/2481 ,  H03K17/063 ,  H04L25/0272

Abstract: An apparatus includes a transmission gate configured to generate a signal based on a first differential input signal and a second differential input signal. The apparatus further includes biasing circuitry responsive to the transmission gate and configured to output a bias voltage based on the signal.

Abstract translation: 一种装置包括：传输门，被配置为基于第一差分输入信号和第二差分输入信号产生信号。 该装置还包括响应于传输门并被配置为基于该信号输出偏置电压的偏置电路。

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

IPC: H03F1/30 ,  H03F3/187 ,  H03F3/72 ,  H03F3/30 ,  H03G3/34

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.