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1. 发明公开

EP0883239A1 Vorverstärker zur Verstärkung von Signalspannungen einer Signalquelle hoher Quellenimpedanz 失效
标题翻译： VorverstärkerzurVerstärkungvon Signalspannungen einer Signalquelle hoher Quellenimpedanz
公开(公告)号：EP0883239A1
公开(公告)日：1998-12-09
申请号：EP97108965.1
申请日：1997-06-04
申请人： KROHNE MESSTECHNIK GMBH & CO. KG
发明人： Van der Pol, Roland, Dipl.-Ing.
IPC分类号： H03F1/00 , H03F1/02 , H03F3/45
CPC分类号： H03F1/0233 , H03F3/45932 , H03F2200/504
摘要： Die Erfindung betrifft einen Vorverstärker zur Verstärkung von Signalspannungen einer Signalquelle (1) hoher Quellenimpedanz mit einem mit der Signalquelle (1) verbundenen Signaleingang (3), mit einer ersten mit einem ersten Versorgungsspannungspotential verbundenen Versorgungsspannungsklemme (4), mit einer zweiten mit einem zweiten Versorgungsspannungspotential verbundenen zweiten Versorgungsspannungsklemme (5) und mit einem ein Ausgangssignal liefernden Signalausgang (8).
Erfindungsgemäß ist ein solcher Vorverstärker dadurch gekennzeichnet, daß das erste und zweite Versorgungsspannungspotential abhängig von dem Ausgangssignal parallel verschiebbar sind. Alternativ oder kumulativ wird ein bekannter Vorverstärker gemäß einer zweiten Lehre der Erfindung dadurch weitergebildet, daß das Potential einer Abschirmung (24) der Signalquelle (1) von dem Ausgangssignal steuerbar ist.
摘要翻译：前置放大器具有连接到高源阻抗信号源（1）的信号输入（3），连接到第一和第二电源电压电位的两个电源电压连接（3,4）和提供输出信号的信号输出（8）。第一和第二电源电压可以根据输出信号并联变化。前置放大器可以是放大信号电压的电压跟随器。第一和第二电源电压可以直接变化。输出信号或wrt。衰减或滤波的输出信号。

2. 发明公开

EP4366163A3 DIFFERENTIAL ALL-PASS COUPLING CIRCUIT WITH COMMON MODE FEEDBACK 审中-实审
公开(公告)号：EP4366163A3
公开(公告)日：2024-10-09
申请号：EP23207140.7
申请日：2023-10-31
申请人： MediaTek Inc.
发明人： ELSHATER, Ahmed Othman Mohamed Mohamed , AWAD, Ramy , ALI, Tamer Mohammed
IPC分类号： H03F3/195 , H03F3/45
CPC分类号： H03F3/45475 , H03F3/195 , H03F2203/4554420130101 , H03F2203/4555120130101 , H03F2203/4558620130101 , H03F3/45932 , H03F2203/4508420130101 , H04L25/0276
摘要： A differential all-pass coupling circuit with common mode feedback is disclosed. An example apparatus includes an anti-aliasing circuit configured to reduce a bandwidth of a first differential signal, and a switched-capacitor circuit coupled to the anti-aliasing circuit configured to control a first switch to charge a capacitor to a first voltage based on a first difference between (i) a common mode input voltage associated with a first common mode voltage of the first differential signal and (ii) a common mode reference voltage associated with a second common mode voltage of an input stage of the receiver, control a second switch to provide a second voltage to the capacitor based on a second difference between the first differential signal and the common mode input voltage, and output a second differential signal to the input stage based on the first differential signal adjusted by the second voltage.

3. 发明公开

EP3012971A1 AMPLIFIER CIRCUIT AND AMPLIFIER-CIRCUIT CHIP 有权
标题翻译： VERSTÄRKERSCHALTUNGUNDVERSTÄRKERSCHALTUNGSCHIP
公开(公告)号：EP3012971A1
公开(公告)日：2016-04-27
申请号：EP14814595.6
申请日：2014-06-17
申请人： Asahi Kasei Microdevices Corporation
发明人： OGAWA, Tomohiko , KOIZUMI, Yoshihiko
IPC分类号： H03F3/34 , G01P3/44 , G01P15/12
CPC分类号： H03F1/56 , G01P3/44 , G01P3/487 , G01P15/12 , G01P15/123 , G01R27/02 , H03F3/45071 , H03F3/45475 , H03F3/45932 , H03F2200/261 , H03F2200/294 , H03F2200/504 , H03F2200/555 , H03F2203/45138 , H03F2203/45336 , H03F2203/45528 , H03F2203/45591 , H03F2203/45592
摘要： The present disclosure is related to an amplifier circuit in which noise components are reduced to achieve a high SN ratio, a low noise, and a small area, and an amplifier circuit IC chip. An amplifier circuit (100) includes a converter (70) configured to convert a predefined physical quantity to a resistance value, and the resistance value converted by the converter (70) is converted to a voltage value and then amplified. The converter (70) includes variable resistance sensors (71, 72) of piezoresistance elements. A bias unit (80) is configured to determine a bias current of the converter (70), and includes bias resistances (81, 82). An operation amplifier unit (90) receives, as input signals, output signals from the bias unit (80) and the converter (70), and includes feedback resistances (91, 92) respectively connected to input and output ends of a first operational amplifier (101). The first operational amplifier (101) is a whole differential operational amplifier including a common-mode feedback circuit.
摘要翻译：本公开涉及其中降低噪声分量以实现高SN比，低噪声和小面积的放大器电路以及放大器电路IC芯片。放大器电路（100）包括被配置为将预定义的物理量转换为电阻值的转换器（70），并且由转换器（70）转换的电阻值被转换为电压值，然后被放大。转换器（70）包括压阻元件的可变电阻传感器（71,72）。偏置单元（80）被配置为确定转换器（70）的偏置电流，并且包括偏置电阻（81,82）。操作放大器单元（90）接收来自偏置单元（80）和转换器（70）的输出信号作为输入信号，并且包括反馈电阻（91,92），分别连接到第一运算放大器（101）。第一运算放大器（101）是包括共模反馈电路的整体差分运算放大器。

4. 发明公开

EP2819306A1 Instrumentation amplifier and signal amplification method 有权
标题翻译： Instrumentenverstärkerund zurSignalverstärkungsverfahren。
公开(公告)号：EP2819306A1
公开(公告)日：2014-12-31
申请号：EP13173913.8
申请日：2013-06-27
申请人： IMEC
发明人： Van Helleputte, Nick , Yazicioglu, Refet Firat
IPC分类号： H03F3/45 , H03F1/34
CPC分类号： H03F1/34 , H03F3/45 , H03F3/45932 , H03F3/45941 , H03F3/68 , H03F2200/261 , H03F2203/45084 , H03F2203/45114 , H03F2203/45116
摘要： An instrumentation amplifier (1) comprising: a first amplifier (10) having one input connected to a first input (InP) of the instrumentation amplifier; a second amplifier (12) having one input connected to a second input (InN) of the instrumentation amplifier; and a feedback network (14) comprising an active filter having a first low pass filter characteristic with a first cut-off frequency in respect of differential mode signals at the first and second inputs (InP,InN) of the instrumentation amplifier and a second low pass filter characteristic with a second cut-off frequency in respect of common mode signals at the first and second inputs (InP,InN) of the instrumentation amplifier.
The invention also relates to a device for acquiring biopotential signals and a signal amplification method.
摘要翻译：一种仪表放大器（1），包括：第一放大器（10），其具有连接到所述仪表放大器的第一输入（InP）的一个输入; 第二放大器（12），其具有连接到所述仪表放大器的第二输入（InN）的一个输入端; 以及反馈网络（14），其包括有源滤波器，所述有源滤波器具有关于所述仪表放大器的第一和第二输入（InP，InN）处的差模信号的第一截止频率的第一低通滤波器特性，以及第二低对于仪器放大器的第一和第二输入（InP，InN）处的共模信号，具有第二截止频率的通滤波器特性。本发明还涉及用于获取生物电位信号的装置和信号放大方法。

5. 发明公开

EP2466745A1 Amplifier common-mode control methods 审中-公开
标题翻译： Verfahren zur Gleichtaktsteuerung einesVerstärkers
公开(公告)号：EP2466745A1
公开(公告)日：2012-06-20
申请号：EP10368049.2
申请日：2010-12-17
申请人： Dialog Semiconductor GmbH
发明人： Myles, Andrew
IPC分类号： H03F1/02 , H03F3/45
CPC分类号： H03F3/45932 , H03F1/0205 , H03F3/45183 , H03F3/45475 , H03F3/45654 , H03F3/45704 , H03F3/45717 , H03F3/45959 , H03F3/45964 , H03F2200/453 , H03F2200/456 , H03F2203/45074 , H03F2203/45078 , H03F2203/45134 , H03F2203/45354 , H03F2203/45366 , H03F2203/45406 , H03F2203/45408 , H03F2203/45528 , H03F2203/45588 , H03F2203/45642
摘要： Systems and methods for providing a fully differential amplifier performing common-mode voltage control having reduced area and power requirements are disclosed. The amplifier (A1) disclosed comprises an additional input stage (30) at the amplifier input which senses the common mode voltage of the amplifier's inputs and applies internal feedback control (Zfbkp, Zfbkn) to adjust the output common-mode voltage until the input common-mode voltage matches a target voltage (Vcmref) and thereby indirectly set the output common-mode voltage. Furthermore the internal common-mode control can be implemented in such a manner as to provide a feed-forward transconductance function in addition to common-mode control if desired. Moreover it is possible to use feedback from other amplifier stages in an amplifier chain to implement common-mode feedback.
摘要翻译：公开了提供具有减小的面积和功率要求的共模电压控制的全差分放大器的系统和方法。公开的放大器（A1）包括在放大器输入处的附加输入级（30），其感测放大器输入的共模电压，并施加内部反馈控制（Zfbkp，Zfbkn）以调整输出共模电压，直到输入公共端模式电压与目标电压（Vcmref）匹配，从而间接设置输出共模电压。此外，如果需要，除了共模控制之外，内部共模控制可以以提供前馈跨导功能的方式来实现。此外，可以使用放大器链中其他放大器级的反馈来实现共模反馈。

6. 发明授权

EP3050211B1 BASEBAND PROCESSING CIRCUITRY 有权
公开(公告)号：EP3050211B1
公开(公告)日：2018-05-30
申请号：EP14781362.0
申请日：2014-09-19
申请人： Qualcomm Incorporated
发明人： CHANG, Li-Chung , GUPTA, Bindu , GATHMAN, Timothy Donald , CHAMAS, Ibrahim Ramez
IPC分类号： H03F3/45 , H03F1/02 , H03F3/72 , H03F1/42 , H03F1/22 , H03F3/193 , H03F1/08
CPC分类号： H03H11/0466 , H03F1/0277 , H03F1/08 , H03F1/223 , H03F3/193 , H03F3/45183 , H03F3/45475 , H03F3/45932 , H03F3/72 , H03F2200/06 , H03F2200/09 , H03F2200/165 , H03F2200/168 , H03F2200/171 , H03F2200/294 , H03F2200/336 , H03F2200/411 , H03F2200/429 , H03F2200/432 , H03F2200/534 , H03F2200/541 , H03F2200/543 , H03F2203/45352 , H03F2203/45396 , H03F2203/45506 , H03F2203/45511 , H03F2203/45512 , H03F2203/45516 , H03F2203/45521 , H03F2203/45522 , H03F2203/45526 , H03F2203/45528 , H03F2203/45594 , H03F2203/45618 , H03F2203/45702 , H03F2203/45728 , H03F2203/7215 , H03F2203/7221 , H03F2203/7236 , H03H2210/021 , H03H2250/00
摘要： Techniques for designing baseband processing circuitry for radio IC's. In an aspect, techniques for differential-to-single-ended conversion in a baseband portion of the IC are disclosed to reduce the pin count and package size for RF IC's. In another aspect, the converter includes selectable narrowband and wideband amplifiers, wherein the wideband amplifiers may be implemented using transistor devices having smaller area than corresponding transistor devices of narrowband amplifiers. Further techniques for bypassing one or more elements, and for implementing a low-pass filter of the converter using an R-C filter network, are described.

7. 发明公开

EP2490331A1 Differential amplifying apparatus 审中-公开
标题翻译： Differenzverstärkungsvorrichtung
公开(公告)号：EP2490331A1
公开(公告)日：2012-08-22
申请号：EP12152605.7
申请日：2012-01-26
申请人： Canon Kabushiki Kaisha
发明人： Yamazaki, Yoshikazu
IPC分类号： H03F3/45
CPC分类号： H03F3/45932 , H03F3/45475 , H03F3/45937 , H03F2200/331 , H03F2203/45424 , H03F2203/45438 , H03F2203/45544 , H03F2203/45594 , H03F2203/45604 , H03F2203/45618
摘要： A differential amplifier amplifies the difference between a signal input to the non-inverting terminal via a capacitor and a signal input to the inverting terminal. A switch switches whether to input the signal to the non-inverting terminal via the capacitor. A resistance is connected between the non-inverting terminal and the inverting terminal. An offset voltage corrector corrects the offset voltage of the differential amplifier based on the output signal of the differential amplifier during a correction period in which the switch is controlled not to input the signal to the non-inverting terminal via the capacitor.
摘要翻译：差分放大器通过电容放大输入到非反相端的信号与输入到反相端的信号之间的差。 A开关切换是否通过电容器将信号输入到同相端子。电阻连接在非反相端子和反相端子之间。偏移电压校正器在控制开关被控制为不通过电容器将信号输入到非反相端子的校正周期期间基于差分放大器的输出信号来校正差分放大器的偏移电压。

8. 发明授权

EP0766381B1 Improved single-ended to differential converter with relaxed common-mode input requirements 失效
标题翻译：改进的单端/差分转换器具有有限的共模输入要求
公开(公告)号：EP0766381B1
公开(公告)日：2002-04-03
申请号：EP96115135.4
申请日：1996-09-20
申请人： Conexant Systems, Inc.
发明人： Stubbe, Frederic M. , Ahmed, Kashif A. , Shamlou, Daryush , Yin, Guanming
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , H03F3/45932 , H03F2203/45528

9. 发明公开

EP0766381A1 Improved single-ended to differential converter with relaxed common-mode input requirements 失效
标题翻译： Verbesserter Eintakt / Differenzumsetzer mitbeschränktemGleichtakteingangssignalbedarf
公开(公告)号：EP0766381A1
公开(公告)日：1997-04-02
申请号：EP96115135.4
申请日：1996-09-20
申请人： ROCKWELL INTERNATIONAL CORPORATION
发明人： Stubbe, Frederic M. , Ahmed, Kashif A. , Shamlou, Daryush , Yin, Guanming
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , H03F3/45932 , H03F2203/45528
摘要： A converter for converting a single-ended input V IN to a differential output signal V OUT through positive and negative output terminals is disclosed. The converter comprises a fully differential amplifier with one of its input terminals coupled to the single-ended input and its other input terminal coupled to a fixed voltage. The converter also has a first resistor ("R 1 ") coupled between the single-ended input and the positive input terminal of the fully differential amplifier, a second resistor ("R 2 ") coupled between the fixed voltage and the negative input terminal of the fully differential amplifier, a third resistor ("R 3 ") coupled between the positive input terminal and the negative output terminal of the fully differential amplifier, and a fourth resistor ("R 4 ") coupled between the negative input terminal and the positive output terminal, wherein the values of such resistors are governed by: R 3 R 1 ≠ R 4 R 2 . The same principles can be applied to differential-to-single-ended converters as well.
摘要翻译：公开了一种用于通过正和负输出端将单端输入VIN转换成差分输出信号VOUT的转换器。该转换器包括全差分放大器，其一个输入端耦合到单端输入，其另一输入端耦合到一固定电压。转换器还具有耦合在全差分放大器的单端输入端和正输入端之间的第一电阻（“R1”），耦合在固定电压与负输入端之间的第二电阻（“R2”）全差分放大器，耦合在全差分放大器的正输入端和负输出端之间的第三电阻（“R3”）和耦合在负输入端和正输出端之间的第四电阻（“R4”），其中这些电阻的值由以下控制：相同的原理也可应用于差分到单端转换器。

10. 发明授权

EP2983292B1 CLASS D SWITCHING AMPLIFIER AND METHOD OF CONTROLLING A LOUDSPEAKER 有权转让
公开(公告)号：EP2983292B1
公开(公告)日：2018-09-19
申请号：EP15177977.4
申请日：2015-07-23
申请人： STMicroelectronics S.r.l.
发明人： RAIMONDI, Marco , BOTTI, Edoardo
IPC分类号： H03F3/217 , H03F1/02 , H03F3/183 , H03F3/185 , H03F3/21 , H03F3/45
CPC分类号： H03F3/45932 , H03F1/0205 , H03F3/183 , H03F3/185 , H03F3/211 , H03F3/217 , H03F3/2173 , H03F2200/03 , H03F2200/129 , H03F2200/171 , H03F2200/258 , H03F2200/351 , H03F2200/78 , H03F2203/21106
摘要： A switching amplifier includes: a first half-bridge PWM modulator (11a); a second half-bridge PWM modulator (11b); at least one amplifier stage (8), configured to receive input signals (I IN+ , I IN- ); and a PWM control stage (10), configured to control switching of the first PWM modulator (11a) and of the second PWM modulator (11b) as a function of the input signals (I IN+ , I IN- ), by respective first PWM control signals (S PWM+ ) and second PWM control signals (S PWM -). The amplifier stage (8) and the PWM control stage (10) have a fully differential structure.

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