公开(公告)号：EP2195926A2

公开(公告)日：2010-06-16

申请号：EP08807652.6

申请日：2008-09-15

Applicant: NXP B.V.

Inventor： BOUHAMAME, Mohamed ,  LOCOCO, Luca ,  ROBERT, Sebastien

IPC: H03H11/12 ,  H03F1/34 ,  H03F3/50 ,  H03F3/195

CPC classification number: H03F3/50 ,  H03F1/26 ,  H03F1/32 ,  H03F1/34 ,  H03F1/56 ,  H03F3/195 ,  H03F3/45475 ,  H03F2200/144 ,  H03F2200/213 ,  H03F2200/378 ,  H03F2200/408 ,  H03F2200/411 ,  H03F2200/435 ,  H03F2200/451 ,  H03F2203/45136 ,  H03F2203/45522 ,  H03F2203/5006 ,  H03F2203/5021 ,  H03F2203/5024 ,  H03F2203/5031 ,  H03F2203/5036 ,  H03F2203/5039 ,  H03G5/14 ,  H03H11/1213 ,  H03H11/1291

Abstract: A tunable RF filter, comprising: an emitter follower stage (2); and a common emitter stage (4); the common emitter stage (4) providing feedback to the emitter follower stage (2). The common emitter stage (4) may comprise a first transistor (Ti) being the only transistor of the common emitter stage (4); and the emitter follower stage (2) may comprise a second transistor (T2) being the only transistor of the emitter follower stage (2). A further tunable RF filter provides improved linearity, comprising: an emitter follower stage (22); a joint common emitter and emitter follower stage (24); and a gain stage (26); a common emitter output of the joint common emitter and emitter follower stage (24) providing feedback to the emitter follower stage (22), and an emitter follower output of the joint common emitter and emitter follower stage (24) providing an input to the gain stage (26).

公开(公告)号：EP1811654A1

公开(公告)日：2007-07-25

申请号：EP06100667.2

申请日：2006-01-20

Applicant: STMicroelectronics SA ,  STMicroelectronics Design and Application S.R.O.

Inventor： Saman, Hynek ,  Murin, Peter ,  Boksa, Martin ,  Panus, Pavel

IPC: H03F1/30

CPC classification number: H03F3/45928 ,  H03F3/45475 ,  H03F2200/459 ,  H03F2203/45136 ,  H03F2203/45166 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45534 ,  H03F2203/45586 ,  H03F2203/45591 ,  H03F2203/45601 ,  H03F2203/45616 ,  H03G1/0088

Abstract: The invention concerns a circuit comprising a first sensitive node, a first component connected between the first sensitive node and a first terminal of a first switch, said first switch controlled by a first control signal variable between a supply voltage level and a second voltage level, and a second switch comprising a first terminal connected to the first terminal of said first switch, and a second terminal connected to a clean voltage level, said second switch controlled to connect the first node of said first switch to said clean voltage level when said first switch is in a non-conducting state.

Abstract translation: 本发明涉及一种电路，包括第一敏感节点，连接在第一敏感节点和第一开关的第一终端之间的第一组件，所述第一开关由电源电压电平和第二电压电平之间的第一控制信号变化控制， 以及第二开关，包括连接到所述第一开关的第一端子的第一端子和连接到清洁电压电平的第二端子，所述第二开关被控制为当所述第一开关被连接到所述第一开关的第一节点时， 开关处于非导通状态。

公开(公告)号：EP1735907A4

公开(公告)日：2007-07-18

申请号：EP05725392

申请日：2005-03-10

Applicant: GCT SEMICONDUCTOR INC

Inventor： PARK JOONBAE ,  LEE SEUNG-WOOK ,  LEE JEONG-WOO ,  LEE KYEONGHO

IPC: H03F3/45 ,  H03F3/21

CPC classification number: H03F3/211 ,  H03F3/45475 ,  H03F3/45659 ,  H03F2203/45136 ,  H03F2203/45138 ,  H03F2203/45166 ,  H03F2203/45168 ,  H03F2203/45434 ,  H03F2203/45522 ,  H03F2203/45591

Abstract: A variable-gain amplifier circuit uses a pair of single-ended operational amplifiers (100, 110) to amplify complementary portions of a differential input signal (IN, INB). By using two single-ended amplifiers (100, 110) instead of a single differential amplifier, linearity is significantly improved. In addition, common mode feedback circuitry is eliminated along with harmonic distortion and other forms of noise which tend to negative affect the quality of the signal output from the circuit.

公开(公告)号：EP0143493B1

公开(公告)日：1991-06-19

申请号：EP84201675.0

申请日：1984-11-20

Applicant: Centralab Inc.

Inventor： Hilgers, John Louis

IPC: H03H1/00 ,  H01C17/22

CPC classification number: H03F3/45475 ,  H01H85/046 ,  H01L23/5256 ,  H01L2924/0002 ,  H03F2203/45522 ,  H03G1/0088 ,  H03H7/24 ,  H05K1/0293 ,  H05K1/092 ,  H05K3/28 ,  H05K2201/09727 ,  H05K2201/10181 ,  H01L2924/00

公开(公告)号：EP3314756A1

公开(公告)日：2018-05-02

申请号：EP16722235.5

申请日：2016-05-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： GRAMEGNA, Giuseppe

IPC: H03F1/32 ,  H03F3/45

CPC classification number: H03F1/3211 ,  H03F1/302 ,  H03F3/45098 ,  H03F3/45103 ,  H03F3/45206 ,  H03F3/45475 ,  H03F2200/408 ,  H03F2200/447 ,  H03F2200/513 ,  H03F2203/45101 ,  H03F2203/45372 ,  H03F2203/45512 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45594 ,  H03F2203/45628 ,  H03F2203/45631 ,  H03F2203/45646 ,  H03F2203/45672 ,  H03F2203/45681 ,  H03F2203/45691 ,  H03F2203/45701 ,  H03F2203/45722

Abstract: A circuit comprises: a circuit input; a circuit output; at least one passive feedback loop coupled between the circuit output and the circuit input; an active element, coupled in a feed-forward path of the circuit between the circuit input and the circuit output and configured to drive the at least one feedback loop in order to establish a function of the circuit, wherein the feed-forward path of the circuit comprises a second node (Vx) and a first node which are internal nodes of the active element and which are coupled between the circuit input and the circuit output, wherein the first node is configured to have a first voltage, the first voltage being a function of the circuit output, wherein the active element comprises a first voltage drop element coupled between the second node (Vx) and the first node.

公开(公告)号：EP3309850A2

公开(公告)日：2018-04-18

申请号：EP17196034.7

申请日：2017-10-11

Applicant: MediaTek Inc.

Inventor： WEN, Sung-Han ,  CHEN, Kuan-Ta

IPC: H01L49/02 ,  H03F3/45

CPC classification number: H01L28/20 ,  H01L27/0802 ,  H01L29/0649 ,  H03F1/3211 ,  H03F3/45475 ,  H03F3/45973 ,  H03F2203/45424 ,  H03F2203/45522 ,  H03F2203/45524

Abstract: An impedance circuit includes a poly-resistor and a controller. The poly-resistor has a first terminal and a second terminal. The controller generates a first control voltage and a second control voltage. The resistance between the first terminal and the second terminal of the poly-resistor is determined according to the first control voltage and the second control voltage. The second control voltage is different from the first control voltage. The proposed impedance circuit can improve the linearity of the poly-resistor.

Abstract translation: 阻抗电路包括一个多电阻和一个控制器。 该多晶硅电阻器具有第一端子和第二端子。 控制器产生第一控制电压和第二控制电压。 根据第一控制电压和第二控制电压确定多晶硅电阻的第一端子和第二端子之间的电阻。 第二控制电压不同于第一控制电压。 所提出的阻抗电路可以改善多晶硅电阻器的线性度。

公开(公告)号：EP3062440A4

公开(公告)日：2017-04-19

申请号：EP14855915

申请日：2014-09-29

Applicant: SAMSUNG ELECTRONICS CO LTD

Inventor： YANG DONG-IL

IPC: H03F1/32 ,  H02M3/156 ,  H03F1/02 ,  H03F3/193 ,  H03F3/195 ,  H03F3/45

CPC classification number: H03F1/0216 ,  H02M1/44 ,  H02M3/156 ,  H03F1/0227 ,  H03F3/193 ,  H03F3/195 ,  H03F3/245 ,  H03F3/45475 ,  H03F2200/102 ,  H03F2200/351 ,  H03F2200/451 ,  H03F2200/555 ,  H03F2200/78 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45591 ,  H03F2203/45594 ,  H03K3/0377

Abstract: Various embodiments of the present invention relate to a power amplification device and method, wherein the power amplification device can comprise: a power amplifier; a switch mode converter for controlling a bias of the power amplifier; a comparator for providing a switching signal to the switch mode converter according to an envelope signal; and a control unit for determining whether a switching frequency of the switch mode converter is within a specific band and applying an offset to the switching frequency so as to deviate from the specific band if the switching frequency of the switch mode converter is within the specific band. Various other embodiments can be carried out.

公开(公告)号：EP2961063A1

公开(公告)日：2015-12-30

申请号：EP15172191.7

申请日：2015-06-15

Applicant: NXP B.V.

Inventor： Brekelmans, Johannes, Hubertus, Antonius

IPC: H03F3/195 ,  H03F1/34 ,  H03F3/08 ,  H03F3/45 ,  H03G1/00 ,  H03H11/12

CPC classification number: H03G3/18 ,  H03F1/34 ,  H03F3/087 ,  H03F3/195 ,  H03F3/45475 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2203/45116 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45522 ,  H03F2203/45526 ,  H03F2203/45528 ,  H03F2203/45534 ,  H03F2203/45536 ,  H03F2203/45562 ,  H03F2203/45591 ,  H03F2203/45594 ,  H03F2203/45616 ,  H03F2203/45618 ,  H03F2203/45644 ,  H03F2203/45686 ,  H03F2203/45702 ,  H03G1/0088

Abstract: Embodiments of variable gain transimpedance amplifiers are described. In an embodiment, the variable gain transimpedance amplifier may include an amplifier coupled to an adjustable gain feedback network, the adjustable gain feedback network including a selectable set of Resistor-Capacitor (RC) branches, each RC branch having one or more unit RC elements, each unit RC element being comprised of a unit resistor and a unit capacitor arranged in parallel.

Abstract translation: 描述可变增益互阻放大器的实施例。 在一个实施例中，可变增益跨阻抗放大器可以包括耦合到可调增益反馈网络的放大器，所述可调增益反馈网络包括可选择的电阻 - 电容（RC）分支组，每个RC分支具有一个或多个单元RC元件， 每个单元RC元件由单元电阻器和并联布置的单位电容器组成。

公开(公告)号：EP2845317A1

公开(公告)日：2015-03-11

申请号：EP13784519.4

申请日：2013-02-26

Applicant: Samsung Electronics Co., Ltd.

Inventor： LEE, Jong-Woo

IPC: H03F3/45 ,  H03H11/04

CPC classification number: H03F3/45076 ,  H03F1/34 ,  H03F3/45475 ,  H03F2200/405 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45534 ,  H03F2203/45536 ,  H03F2203/45591 ,  H03F2203/45594 ,  H03G1/0088 ,  H03G1/0094 ,  H03H11/126 ,  H03H11/1291 ,  H03H2210/025 ,  H03H2210/036

Abstract: An amplifier circuit is provided. The amplifier circuit includes an operational amplifier, a feedback resistor for changing gain and cutoff frequency characteristics of the operational amplifier, and a feedback variable capacitor for changing the cutoff frequency characteristics of the operational amplifier, wherein a capacitance of the feedback variable capacitor increases exponentially according to a digital control code, and the cutoff frequency of the operational amplifier is inversely proportional to the capacitance of the feedback variable capacitor and varies linearly on a logarithmic scale.

公开(公告)号：EP2793393A1

公开(公告)日：2014-10-22

申请号：EP13164614.3

申请日：2013-04-21

Applicant: Kornienkov, Alexey

Inventor： Kornienkov, Alexey

IPC: H03F1/32 ,  H03F3/183 ,  H03G5/16

CPC classification number: H03F3/45475 ,  H03F1/3211 ,  H03F3/187 ,  H03F2203/45411 ,  H03F2203/45512 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45544 ,  H03F2203/45594 ,  H03F2203/45598 ,  H03G5/28 ,  H04R3/04 ,  H04R9/12

Abstract: Method and electronic device for applying a transfer function, in particular a linearization, de-emphasis or emphasis, on a signal received from a transducer (1), wherein the device comprises at least one input (2), for the receipt of the signal, an analog circuit (3) comprising at least one filter (4) for signal processing, and an output (5) for the processed signal. The_device further comprises a microcontroller circuit which is coupled to at least one electronic part (6) of the analog circuit (3) and adapted to adjust the electric properties of at least the one electronic part (6).

Abstract translation: 来自换能器（1）接收到用于施加的传递函数，尤其是线性化，去加重或强调，在一个信号的方法和电子设备，worin所述装置包括至少一个输入端（2），用于接收所述信号的 到模拟电路（3）包括用于信号处理的至少一个过滤器（4），并输出（5）用于将处理后的信号。 The_device还包括一个微控制器电路的所有其耦合到至少一个电子部件的模拟电路（3）和angepasst调整至少一个电子部件的电特性的（6）（6）。