公开(公告)号：US20190253024A1

公开(公告)日：2019-08-15

申请号：US16342409

申请日：2017-10-18

申请人： Carrier Corporation

发明人： Ronie LAVON ,  Dan MELANSON

IPC分类号： H03F1/30 ,  F23N5/08 ,  H03G1/00

CPC分类号： H03F1/30 ,  F23N5/082 ,  H03F1/34 ,  H03F3/087 ,  H03F3/45475 ,  H03F2200/126 ,  H03F2200/156 ,  H03F2200/261 ,  H03F2200/447 ,  H03F2203/45136 ,  H03F2203/45286 ,  H03F2203/45518 ,  H03F2203/45524 ,  H03F2203/45536 ,  H03G1/0088 ,  H03G2201/502

摘要： An amplifier assembly (100) includes an amplifier (102) having an input terminal, an output terminal and a feedback terminal; a first feedback path connecting the output terminal to the feedback terminal; a second feedback path connecting the output terminal to the feedback terminal; a switch (124) positioned in the second feedback path, the switch (124) opening or closing in response to a voltage at the output terminal relative to a breakpoint, when the switch (124) is open, the amplifier assembly (100) has a first gain and when the switch (124) is closed, the amplifier assembly (100) has a second gain; and a thermally variable element (152) connected to the switch (124), the thermally variable element (152) configured to generate a compensation voltage to maintain the breakpoint in response to varying temperature of the switch (152).

公开(公告)号：US20190013819A1

公开(公告)日：2019-01-10

申请号：US16020678

申请日：2018-06-27

申请人： STMicroelectronics S.r.I.

发明人： Luigino D'Alessio ,  Germano Nicollini

IPC分类号： H03M1/46

CPC分类号： H03M1/466 ,  H03F1/3211 ,  H03F3/005 ,  H03F3/45475 ,  H03F2200/156 ,  H03F2200/159 ,  H03F2200/264 ,  H03F2203/45134 ,  H03F2203/45136 ,  H03F2203/45171 ,  H03F2203/45514 ,  H03F2203/45534 ,  H03F2203/45546 ,  H03F2203/45551 ,  H03M1/804

摘要： In some embodiments, a circuit for use in devices involving digital-to-analog conversion of signals includes: a capacitive digital-to-analog converter array and an amplifier. The capacitive digital-to-analog converter includes an input port for receiving a digital input signal and an output port. The amplifier includes capacitive feedback loops that include a first capacitor coupling the output of the amplifier with the input of the amplifier and a second capacitor coupled to the output port of the digital-to-analog converter array at the input of the amplifier. The circuit further includes a set of switches that include a first switch and a second switch coupled with opposed ends of the second capacitor at the input and at the output of the amplifier, respectively.

公开(公告)号：US09973146B2

公开(公告)日：2018-05-15

申请号：US15657618

申请日：2017-07-24

申请人： SHENZHEN GOODIX TECHNOLOGY CO., LTD.

发明人： Mengwen Zhang

IPC分类号： H03F3/04 ,  H03F1/02 ,  H03F1/30 ,  H03F1/32 ,  H03F3/187

CPC分类号： H03F1/0205 ,  H03F1/301 ,  H03F1/32 ,  H03F3/005 ,  H03F3/187 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/45192 ,  H03F3/45475 ,  H03F3/45659 ,  H03F3/45699 ,  H03F3/45762 ,  H03F2200/129 ,  H03F2200/156 ,  H03F2200/159 ,  H03F2200/18 ,  H03F2200/222 ,  H03F2200/252 ,  H03F2200/264 ,  H03F2200/471 ,  H03F2200/555 ,  H03F2203/45008 ,  H03F2203/45012 ,  H03F2203/45024 ,  H03F2203/45028 ,  H03F2203/45054 ,  H03F2203/45068 ,  H03F2203/45082 ,  H03F2203/45112 ,  H03F2203/45134 ,  H03F2203/45136 ,  H03F2203/45171 ,  H03F2203/45174 ,  H03F2203/45182 ,  H03F2203/45188 ,  H03F2203/45192 ,  H03F2203/45208 ,  H03F2203/45244 ,  H03F2203/45332 ,  H03F2203/45421 ,  H03F2203/45434 ,  H03F2203/45444 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45534 ,  H03F2203/45544 ,  H03F2203/45546 ,  H03F2203/45551 ,  H03F2203/45586 ,  H03F2203/45588 ,  H03F2203/45616 ,  H03F2203/45632 ,  H03F2203/45642 ,  H03F2203/45656 ,  H03F2203/45674 ,  H03F2203/45676

摘要： An amplifying circuit includes a reference voltage generating circuit, a common-mode voltage conversion circuit, a common-mode negative feedback circuit, and an amplifying sub-circuit. The reference voltage generating circuit generates a first reference voltage, a second reference voltage, and a reference common-mode voltage according to a post-stage common-mode voltage. The common-mode voltage conversion circuit converts the pre-stage output differential signal into a differential input signal according to the reference common-mode voltage. The common-mode negative feedback circuit generates a control voltage to quickly establish a common-mode negative feedback of the amplifying sub-circuit, wherein the first reference voltage and the second reference voltage are used to cancel a baseline signal of the pre-stage output differential signal. The amplifying circuit can eliminate the baseline signal, convert the common-mode voltage and quickly establish the common-mode negative feedback.

公开(公告)号：US09729113B2

公开(公告)日：2017-08-08

申请号：US15202193

申请日：2016-07-05

申请人： National Chiao Tung University

发明人： Yu-Jiu Wang ,  Ching-Yun Chu

IPC分类号： H03F3/04 ,  H03F3/45 ,  H03F1/02 ,  H03F3/16 ,  H03F1/30 ,  G05F3/24

CPC分类号： H03F3/45475 ,  G05F3/242 ,  H03F1/0205 ,  H03F1/0261 ,  H03F1/301 ,  H03F3/16 ,  H03F2200/24 ,  H03F2200/555 ,  H03F2203/45136 ,  H03F2203/45154 ,  H03F2203/45288 ,  H03F2203/45528

摘要： A bias circuit is adapted for biasing a to-be-biased transconductance cell such that the to-be-biased transconductance cell has a constant transconductance, and includes a converter and a controller. The converter receives first and second current signals, and generates, based on the first and second current signals, a first voltage signal, a second voltage signal and a bias voltage that is for biasing the to-be-biased transconductance cell. The controller receives the first and second voltage signals from the converter, generates the first and second current signals for the converter based on the first and second voltage signals so as to make a magnitude of the first voltage signal equal a magnitude of the second voltage signal.

公开(公告)号：US20160365859A1

公开(公告)日：2016-12-15

申请号：US14862520

申请日：2015-09-23

申请人： MEDIATEK INC.

发明人： Fei Song ,  Osama Shana'a ,  Yuen Hui Chee

IPC分类号： H03K19/0185 ,  H04B1/40

CPC分类号： H03K19/018514 ,  H03F3/195 ,  H03F3/3001 ,  H03F3/3028 ,  H03F3/3033 ,  H03F3/3037 ,  H03F3/45201 ,  H03F3/45475 ,  H03F3/505 ,  H03F2200/21 ,  H03F2200/42 ,  H03F2200/451 ,  H03F2200/498 ,  H03F2200/69 ,  H03F2200/75 ,  H03F2203/45136 ,  H03F2203/45168 ,  H03F2203/45224 ,  H03F2203/45258 ,  H03F2203/45301 ,  H03F2203/45496 ,  H03F2203/45544 ,  H03F2203/45596 ,  H03F2203/45656 ,  H03F2203/45674 ,  H04B1/40 ,  H04B2001/0425

摘要： A wideband highly-linear buffer circuit exhibiting a low output impedance comprises a first PFET (PFET1), a second PFET (PFET2), a first NFET (NFET1), and a second NFET (NFET2). Sources of PFET1 and PFET2 are coupled to VDD. PFET1's drain is coupled to an output lead. PFET2 acts as a current source. NFET1's drain is coupled to PFET2's drain and to PFET1's gate. NFET1's source is coupled to the output lead. NFET2's source is coupled to ground. NFET2's drain is coupled to NFET1's source and to the output lead. NFET1's gate is AC coupled to a first input lead. In a single-ended input example, NFET2's gate is AC coupled NFET1's drain. In a differential input example, NFET2's gate is AC coupled to a second input lead. In another differential input example, PFET2 is not just a current source, but rather PFET2's gate is AC coupled to the first input lead.

摘要翻译： 呈现低输出阻抗的宽带高线性缓冲电路包括第一PFET（PFET1），第二PFET（PFET2），第一NFET（NFET1）和第二NFET（NFET2）。 PFET1和PFET2的源极耦合到VDD。 PFET1的漏极耦合到输出引线。 PFET2作为电流源。 NFET1的漏极耦合到PFET2的漏极和PFET1的栅极。 NFET1的源极耦合到输出引线。 NFET2的源极耦合到地。 NFET2的漏极耦合到NFET1的源极和输出引线。 NFET1的栅极与第一个输入引线交流耦合。 在单端输入示例中，NFET2的栅极是交流耦合NFET1的漏极。 在差分输入示例中，NFET2的栅极被AC耦合到第二输入引线。 在另一个差分输入示例中，PFET2不仅仅是电流源，而是PFET2的栅极与第一个输入引线交流耦合。

公开(公告)号：US20160343525A1

公开(公告)日：2016-11-24

申请号：US15114390

申请日：2015-02-02

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： TAKASHI UMEDA ,  TAKESHI UEMURA ,  HIDEAKI FUJIURA

IPC分类号： H01H47/00 ,  G01R33/06 ,  G01C19/5776 ,  G01P15/08 ,  H03K17/00 ,  H03F3/45

CPC分类号： H01H47/00 ,  G01C19/5776 ,  G01P15/08 ,  G01R33/06 ,  H03F3/45475 ,  H03F2200/261 ,  H03F2203/45136 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45528 ,  H03F2203/45534 ,  H03F2203/45536 ,  H03F2203/45548 ,  H03F2203/45594 ,  H03F2203/45616 ,  H03F2203/45618 ,  H03K17/005

摘要： A electronic apparatus includes a switching circuit including first and second circuits and a controller that controls the switching circuit. The first and second circuits process signals of first and second sensor elements, respectively. The controller switches between the first and second circuits of the switching circuit. The electronic apparatus can have a small size.

摘要翻译： 一种电子设备，包括包括第一和第二电路的开关电路和控制开关电路的控制器。 第一和第二电路分别处理第一和第二传感器元件的信号。 控制器在开关电路的第一和第二电路之间切换。 电子设备可以具有小尺寸。

公开(公告)号：US09225294B2

公开(公告)日：2015-12-29

申请号：US14078050

申请日：2013-11-12

申请人： QUALCOMM Incorporated

发明人： Wenchang Huang ,  Vijayakumar Dhanasekaran

IPC分类号： H03F1/14 ,  H03F1/30 ,  H03F3/187 ,  H03F3/30 ,  H03F3/72

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.

摘要翻译： 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。

公开(公告)号：US09014396B2

公开(公告)日：2015-04-21

申请号：US12023854

申请日：2008-01-31

申请人： Guoqing Miao

发明人： Guoqing Miao

IPC分类号： H04B15/00 ,  H03F1/30 ,  H03F3/187 ,  H03F3/45

CPC分类号： H03F1/305 ,  H03F3/187 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2203/45136

摘要： An audio system that reduces or eliminates click and pop noise during power up and power down operations. In particular, the audio system includes an amplifier with an input adapted to receive an input audio signal and an output adapted to produce an amplified output audio signal for an associated speaker. The audio system further includes a noise reduction circuit adapted to smoothly apply and remove a DC voltage to and from the output of the amplifier in a manner that reduces or eliminates click and pop noise from being generated by the associated speaker. The DC voltage at the output of the amplifier may be derived from a DC reference voltage source and/or from the input audio signal.

摘要翻译： 一种音频系统，可在上电和关机操作期间减少或消除点击和弹出式噪音。 特别地，音频系统包括具有适于接收输入音频信号的输入的放大器和适于为相关联的扬声器产生放大的输出音频信号的输出。 该音频系统还包括一个降噪电路，适用于平滑地向放大器的输出端施加和去除直流电压，以减少或消除由相关联的扬声器产生的点击和弹出噪声。 放大器输出端的直流电压可以从直流参考电压源和/或输入音频信号导出。

公开(公告)号：US08324555B2

公开(公告)日：2012-12-04

申请号：US13217240

申请日：2011-08-25

申请人： Lester F. Ludwig

发明人： Lester F. Ludwig

IPC分类号： H03F3/45 ,  H01L21/28 ,  B82Y40/00

CPC分类号： H03F3/45475 ,  B82Y10/00 ,  G11C13/025 ,  H01L27/283 ,  H01L29/1606 ,  H01L51/0048 ,  H01L51/0545 ,  H03F3/45076 ,  H03F3/45183 ,  H03F2203/45008 ,  H03F2203/45136 ,  H03F2203/45466 ,  Y10S977/938 ,  Y10S977/953

摘要： A multiple transistor differential amplifier is implemented on a segment of a single graphene nanoribbon. Differential amplifier field effect transistors are formed on the graphene nanoribbon from a first group of electrical conductors in contact with the graphene nanoribbon and a second group of electrical conductors insulated from, but exerting electric fields on, the graphene nanoribbon thereby forming the gates of the field effect transistors. A transistor in one portion of the graphene nanoribbon and a transistor in another portion of the graphene nanoribbon are responsive to respective incoming electrical signals. A current source, also formed on the graphene nanoribbon, is connected with the differential amplifier, and the current source and the differential amplifier operating together generate an outgoing signal responsive to the incoming electrical signal. In an example application, the resulting circuit can be used to interface with electrical signals of nanoscale sensors and actuators.

摘要翻译： 在单个石墨烯纳米棒的一段上实现多晶体管差分放大器。 差分放大器场效应晶体管形成在与石墨烯纳米薄片接触的第一组电导体的石墨烯纳米棒上，和在石墨烯纳米纤维上绝缘而不是施加电场的第二组电导体，从而形成场效应的栅极 晶体管。 石墨烯纳米纤维的一部分中的晶体管和石墨烯纳米纤维的另一部分中的晶体管对相应的输入电信号是响应的。 也形成在石墨烯纳米薄片上的电流源与差分放大器连接，并且电流源和差分放大器一起工作，响应输入的电信号产生输出信号。 在示例应用中，所得到的电路可用于与纳米尺度传感器和致动器的电信号进行接口。

公开(公告)号：US20120112798A1

公开(公告)日：2012-05-10

申请号：US13289448

申请日：2011-11-04

申请人： Elmar Wagner

发明人： Elmar Wagner

IPC分类号： H02M1/00

CPC分类号： H03H11/126 ,  G05F1/561 ,  H03F2200/513 ,  H03F2203/45136 ,  H03F2203/45511 ,  H03F2203/45526

摘要： A current-to-voltage converter for providing a voltage signal based on a current signal has a first active stage having an input and an output. The first active stage is configured to receive the current signal at its input and provide the voltage signal at its output. In addition, the current-to-voltage converter has a second active stage that is coupled between the output of the first active stage and the input of the first active stage. The second active stage is configured to provide the input of the first active stage with a feedback signal that frequency-selectively counteracts amplification, by the first active stage, of signal components of a current signal applied to the input of the first active stage that have a frequency outside of a prescribed useful frequency band.

摘要翻译： 用于基于电流信号提供电压信号的电流 - 电压转换器具有具有输入和输出的第一有源级。 第一个有源级配置为在其输入端接收电流信号，并在其输出端提供电压信号。 此外，电流 - 电压转换器具有耦合在第一有源级的输出和第一有效级的输入之间的第二有源级。 第二有源级被配置为向第一有源级的输入提供反馈信号，所述反馈信号频率选择地抵消由第一有源级放大施加到具有第一有源级的输入的电流信号的信号分量， 在规定的有用频带之外的频率。