公开(公告)号：US20180173670A1

公开(公告)日：2018-06-21

申请号：US15847555

申请日：2017-12-19

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Junming HAN ,  Bingzhao ZHANG ,  Jie PENG ,  Yongwang LIU

IPC分类号： G06F13/42 ,  H03F3/45 ,  G06F13/40

CPC分类号： G06F13/4282 ,  G06F13/4072 ,  H03F3/2171 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/45659 ,  H03F3/4569 ,  H03F2203/45276 ,  H03F2203/45418 ,  H03F2203/45426 ,  H03F2203/45466

摘要： A drive circuit for a serial communications system is provided. The drive circuit may include a mode controller, a pre-drive circuit, and a main drive circuit. The main drive circuit includes multiple mode control switches and at least one pair of differential switches. The mode controller is configured to: generate a mode control signal, and transmit the mode control signal to the main drive circuit. The pre-drive circuit is configured to: convert a differential digital signal into a differential control signal, and transmit the differential control signal to the main drive circuit. The main drive circuit controls on/off states of the multiple mode control switches according to the mode control signal, and works in corresponding working modes. The drive circuit controls the states of the mode control switches in the main drive circuit, so that the main drive circuit works in different working modes.

公开(公告)号：US20170063309A1

公开(公告)日：2017-03-02

申请号：US15186273

申请日：2016-06-17

申请人： QUALCOMM Incorporated

发明人： Kshitij YADAV ,  Vijayakumar DHANASEKARAN

IPC分类号： H03F1/26 ,  H04B1/40 ,  H04R3/00 ,  H03F3/183 ,  H03F3/45

CPC分类号： H03F1/26 ,  H03F1/0277 ,  H03F1/305 ,  H03F1/34 ,  H03F3/183 ,  H03F3/187 ,  H03F3/211 ,  H03F3/213 ,  H03F3/45475 ,  H03F3/72 ,  H03F2200/03 ,  H03F2200/129 ,  H03F2200/135 ,  H03F2200/144 ,  H03F2200/153 ,  H03F2200/156 ,  H03F2200/159 ,  H03F2200/234 ,  H03F2200/312 ,  H03F2200/372 ,  H03F2200/408 ,  H03F2200/414 ,  H03F2200/421 ,  H03F2200/459 ,  H03F2203/21109 ,  H03F2203/45051 ,  H03F2203/45116 ,  H03F2203/45118 ,  H03F2203/45134 ,  H03F2203/45138 ,  H03F2203/45156 ,  H03F2203/45206 ,  H03F2203/45221 ,  H03F2203/45264 ,  H03F2203/45276 ,  H03F2203/45512 ,  H03F2203/45526 ,  H03F2203/45528 ,  H03F2203/45534 ,  H03F2203/45546 ,  H03F2203/45548 ,  H03F2203/45601 ,  H03F2203/45616 ,  H03F2203/45632 ,  H03F2203/45652 ,  H03F2203/45682 ,  H03F2203/45698 ,  H03F2203/45718 ,  H03F2203/45726 ,  H03F2203/7212 ,  H03F2203/7215 ,  H03F2203/7224 ,  H03F2203/7231 ,  H04B1/40 ,  H04R3/007

摘要： An audio amplifier, including: at least a two stage amplifier configured to receive an input signal and output an amplified output signal, the at least a two stage amplifier including at least one stage amplifier and an output stage amplifier; and an auxiliary stage amplifier having an input coupled to an output of the at least one stage amplifier and an input of the output stage amplifier.

摘要翻译： 一种音频放大器，包括：至少两级放大器，被配置为接收输入信号并输出​​放大的输出信号，所述至少两级放大器包括至少一个级放大器和输出级放大器; 以及辅助级放大器，其具有耦合到所述至少一个级放大器的输出和所述输出级放大器的输入的输入。

公开(公告)号：US20180198413A1

公开(公告)日：2018-07-12

申请号：US15537571

申请日：2016-04-25

申请人： Mitsubishi Electric Corporation

发明人： Tomokazu OGOMI ,  Takayuki NAKAI

IPC分类号： H03F1/02 ,  H03F3/72 ,  H03G3/30 ,  H03F3/45 ,  G01R33/09 ,  G01R33/00

CPC分类号： H03F1/0211 ,  G01R33/0023 ,  G01R33/09 ,  H03F1/0277 ,  H03F3/45076 ,  H03F3/45475 ,  H03F3/72 ,  H03F2200/414 ,  H03F2200/417 ,  H03F2200/421 ,  H03F2203/45138 ,  H03F2203/45276 ,  H03F2203/45526 ,  H03F2203/45686 ,  H03F2203/45701 ,  H03G1/0088 ,  H03G3/30 ,  H03G5/12 ,  H03G5/14

摘要： In a sensor reader, an IC chip has a function for amplifying and outputting a sensor signal from each sensor element included in a sensor array, and includes a plurality of channel amplifiers connected each of the sensor elements. When an output switch is closed and the IC chip is in the outputting state, channel switches operate sequentially, and sensor amplification signals are output sequentially from the channel amplifiers. When the output switch is open and the IC chip is in the non-outputting state, a bias current of an operational amplifier of the channel amplifier is decreased, the IC chip is set to a low power consumption state, and gain of the operational amplifier is decreased.

公开(公告)号：US20180152156A1

公开(公告)日：2018-05-31

申请号：US15818547

申请日：2017-11-20

申请人： REALTEK SEMICONDUCTOR CORPORATION

发明人： KUAN-YU SHIH

IPC分类号： H03F3/45 ,  H03F1/02

CPC分类号： H03F3/45224 ,  H03F1/0211 ,  H03F3/45475 ,  H03F3/45636 ,  H03F3/4565 ,  H03F3/45654 ,  H03F2200/144 ,  H03F2200/267 ,  H03F2200/48 ,  H03F2203/45031 ,  H03F2203/45032 ,  H03F2203/45151 ,  H03F2203/45156 ,  H03F2203/45276 ,  H03F2203/45404 ,  H03F2203/45418 ,  H03F2203/45424 ,  H03F2203/45692

摘要： An operational amplifier and a differential amplifying circuit thereof. The differential amplifying circuit receives a differential input signal and outputs a differential output signal. The differential amplifying circuit includes an output port that has a first terminal and a second terminal, the differential output signal being outputted via the first and second terminals; a first transistor pair receiving the differential input signal via two first ends and coupling to the first and second terminals respectively via two second ends; a second transistor pair receiving the differential input signal via two first ends and coupling to the first and second terminals respectively via two second ends; and a third transistor pair receiving a control signal via two first ends and coupling to the first and second terminals respectively via two second ends. The control signal controls the third transistor pair to switch on or off and/or controls the current flowing therethrough.

公开(公告)号：US09843297B2

公开(公告)日：2017-12-12

申请号：US14814080

申请日：2015-07-30

申请人： COSEMI TECHNOLOGIES, INC.

发明人： Robert Monroe Smith ,  Charles Phillip McClay

IPC分类号： H03F3/45 ,  H03F3/08 ,  H03F1/56 ,  H03F1/02 ,  H03F1/08

CPC分类号： H03F1/56 ,  H03F1/0205 ,  H03F1/083 ,  H03F3/08 ,  H03F3/45076 ,  H03F3/45085 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/45605 ,  H03F3/45609 ,  H03F3/45618 ,  H03F3/45753 ,  H03F3/45757 ,  H03F3/45766 ,  H03F3/45977 ,  H03F3/45982 ,  H03F3/45991 ,  H03F2200/135 ,  H03F2200/18 ,  H03F2200/222 ,  H03F2200/228 ,  H03F2200/36 ,  H03F2200/393 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2200/462 ,  H03F2200/471 ,  H03F2200/474 ,  H03F2200/72 ,  H03F2200/75 ,  H03F2203/45036 ,  H03F2203/45051 ,  H03F2203/45114 ,  H03F2203/45116 ,  H03F2203/45138 ,  H03F2203/45146 ,  H03F2203/45152 ,  H03F2203/45154 ,  H03F2203/45166 ,  H03F2203/45202 ,  H03F2203/45208 ,  H03F2203/45221 ,  H03F2203/45276 ,  H03F2203/45336 ,  H03F2203/45374 ,  H03F2203/45398 ,  H03F2203/45528 ,  H03F2203/45541 ,  H03F2203/45556 ,  H03F2203/45564 ,  H03F2203/45566 ,  H03F2203/45592 ,  H03F2203/45594 ,  H03F2203/45652 ,  H03F2203/45682 ,  H03F2203/45702

摘要： A balanced differential transimpedance amplifier with a single-ended input operational over a wide variation in the dynamic range of input signals. A threshold circuit is employed to either or a combination of (1) generate a varying decision threshold to ensure a proper slicing over a wide range of input current signal levels; and (2) generate a bias current and voltage applied to an input of a transimpedance stage to cancel out a dependence of the transimpedance stage voltage input on input current signal levels.

公开(公告)号：US20160294336A1

公开(公告)日：2016-10-06

申请号：US14814080

申请日：2015-07-30

申请人： TYCO ELECTRONICS CORPORATION

发明人： ROBERT MONROE SMITH ,  CHARLES PHILLIP MCCLAY

IPC分类号： H03F1/56 ,  H03F3/08 ,  H03F3/45 ,  H03F1/02

CPC分类号： H03F1/56 ,  H03F1/0205 ,  H03F1/083 ,  H03F3/08 ,  H03F3/45076 ,  H03F3/45085 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/45605 ,  H03F3/45609 ,  H03F3/45618 ,  H03F3/45753 ,  H03F3/45757 ,  H03F3/45766 ,  H03F3/45977 ,  H03F3/45982 ,  H03F3/45991 ,  H03F2200/135 ,  H03F2200/18 ,  H03F2200/222 ,  H03F2200/228 ,  H03F2200/36 ,  H03F2200/393 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2200/462 ,  H03F2200/471 ,  H03F2200/474 ,  H03F2200/72 ,  H03F2200/75 ,  H03F2203/45036 ,  H03F2203/45051 ,  H03F2203/45114 ,  H03F2203/45116 ,  H03F2203/45138 ,  H03F2203/45146 ,  H03F2203/45152 ,  H03F2203/45154 ,  H03F2203/45166 ,  H03F2203/45202 ,  H03F2203/45208 ,  H03F2203/45221 ,  H03F2203/45276 ,  H03F2203/45336 ,  H03F2203/45374 ,  H03F2203/45398 ,  H03F2203/45528 ,  H03F2203/45541 ,  H03F2203/45556 ,  H03F2203/45564 ,  H03F2203/45566 ,  H03F2203/45592 ,  H03F2203/45594 ,  H03F2203/45652 ,  H03F2203/45682 ,  H03F2203/45702

摘要： A balanced differential transimpedance amplifier with a single-ended input operational over a wide variation in the dynamic range of input signals. A threshold circuit is employed to either or a combination of (1) generate a varying decision threshold to ensure a proper slicing over a wide range of input current signal levels; and (2) generate a bias current and voltage applied to an input of a transimpedance stage to cancel out a dependence of the transimpedance stage voltage input on input current signal levels.

摘要翻译： 平衡差分跨阻放大器，具有单端输入，可在输入信号的动态范围内进行广泛的变化。 阈值电路被采用或（或）组合（1）产生变化的判定阈值以确保在宽范围的输入电流信号电平上的适当的分片; 并且（2）产生施加到跨阻抗级的输入的偏置电流和电压，以消除跨导级电压输入对输入电流信号电平的依赖性。