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1. 发明公开

EP3161935A4 CANCEL VOLTAGE OFFSET OF OPERATIONAL AMPLIFIER 有权转让
公开(公告)号：EP3161935A4
公开(公告)日：2018-05-30
申请号：EP14896755
申请日：2014-06-30
申请人： HEWLETT PACKARD DEVELOPMENT CO
发明人： SAWYERS THOMAS , LLOYD JON G
IPC分类号： H02J7/00 , G06F1/26 , H03F3/45
CPC分类号： H02J7/0072 , H02J2007/0059 , H03F3/45076 , H03F3/45475 , H03F3/45973
摘要： A system according to examples of the present disclosure includes a battery charger electrically coupled to a battery and a battery charging circuit. The battery charging circuit includes an operational amplifier having a negative input to receive a pre-bias voltage, a positive input, an output, and a voltage offset. The battery charging circuit also includes a charge controller having an analog-to-digital converter to receive a voltage output from the output of the operational amplifier and a voltage supply to supply a voltage input into the positive input of the operation amplifier to cancel the voltage offset of the operational amplifier. In the example, the voltage output of the charge controller is a function of the voltage input of the charge controller.

2. 发明公开

EP3117519A1 INTEGRATOR FOR CLASS D AUDIO AMPLIFIER 审中-公开
标题翻译：集成商FUCR KLASSE-D-AUDIOVERSTÄRKER
公开(公告)号：EP3117519A1
公开(公告)日：2017-01-18
申请号：EP15708395.7
申请日：2015-02-19
申请人： Qualcomm Incorporated
发明人： LU, Jingxue , SIENKO, Matthew David , SRIVASTAVA, Ankit , MISHRA, Manu
IPC分类号： H03F1/30 , H03F3/183 , H03F3/217
CPC分类号： H03F1/0233 , H03F1/30 , H03F3/183 , H03F3/185 , H03F3/2173 , H03F3/45076 , H03F2200/03
摘要： An apparatus includes voltage-to-current conversion circuitry (310) comprising a first voltage-to-current converter and a second voltage-to-current converter. The apparatus also includes a capacitor (314) coupled to the first voltage-to-current converter and to the second voltage-to-current converter.
摘要翻译：一种装置包括电压 - 电流转换电路，其包括第一电压 - 电流转换器和第二电压 - 电流转换器。该装置还包括耦合到第一电压 - 电流转换器和第二电压 - 电流转换器的电容器。

3. 发明公开

EP2996244A1 Two differential amplifier configuration 审中-公开
标题翻译： Zweifache差异Verstärkerkonfiguration
公开(公告)号：EP2996244A1
公开(公告)日：2016-03-16
申请号：EP15153094.6
申请日：2015-01-29
申请人： ESS Technology, Inc.
发明人： Mallinson, A. Martin
IPC分类号： H03F1/34 , H03F3/45
CPC分类号： H03F3/45076 , H03F1/0205 , H03F1/34 , H03F3/45475 , H03F3/45941 , H03F3/4595 , H03F2200/09 , H03F2203/45114 , H03F2203/45116 , H03F2203/45138 , H03F2203/45224 , H03F2203/45336 , H03F2203/45416 , H03F2203/45446 , H03F2203/45521 , H03F2203/45528 , H03F2203/45594
摘要： An apparatus is disclosed for providing a common mode voltage to the inputs of a first differential amplifier (404, R3, R4) which outputs the difference between two signals. A second differential amplifier (406, R9, R10) receives the output of the first differential amplifier (404, R3, R4), and the output of the second differential amplifier (406, R9, R10) is fed back to the inputs of the first differential amplifier (404, R3, R4) as a common mode voltage. Since both inputs of the first differential amplifier (404, R3, R4) receive the fed back common mode voltage, the first differential amplifier (404, R3, R4) still outputs only the difference in the two signals, but the presence of the common mode voltage allows the first differential amplifier (404, R3, R4) to operate with lower noise if the voltage levels of the inputs to the first differential amplifier (404, R3, R4) vary. The second differential amplifier (406, R9, R10) may be of significantly lower quality and cost than the first differential amplifier (404, R3, R4), without affecting the performance of the first differential amplifier (404, R3, R4).
摘要翻译：公开了一种用于向输出两个信号之间的差的第一差分放大器（404，R3，R4）的输入端提供共模电压的装置。第二差分放大器（406，R9，R10）接收第一差分放大器（404，R3，R4）的输出，第二差分放大器（406，R9，R10）的输出反馈到第一差分放大器（404，R3，R4）作为共模电压。由于第一差分放大器（404，R3，R4）的两个输入都接收反馈共模电压，所以第一差分放大器（404，R3，R4）仍然仅输出两个信号的差值，如果第一差分放大器（404，R3，R4）的输入的电压电平变化，则模式电压允许第一差分放大器（404，R3，R4）以更低的噪声工作。与第一差分放大器（404，R3，R4）相比，第二差分放大器（406，R9，R10）的质量和成本可以低得多，而不会影响第一差分放大器（404，R3，R4）的性能。

4. 发明公开

EP2906111A2 MEDICAL AMPLIFIER ISOLATION 有权
标题翻译： ISOLIERUNG EINES MEDIZINISCHENVERSTÄRKERS
公开(公告)号：EP2906111A2
公开(公告)日：2015-08-19
申请号：EP13845495.4
申请日：2013-10-11
申请人： CardioInsight Technologies, Inc.
发明人： BIEL, Arkadiusz , WODLINGER, Harold , FINE, Richard, M.
IPC分类号： A61B5/04
CPC分类号： H03F1/02 , A61B5/04 , A61B5/04004 , A61B5/0408 , A61B5/04082 , A61B5/0476 , A61B2562/182 , H03F3/45076 , H03F2200/372 , H03F2203/45151
摘要： This disclosure provides isolation for a medical amplifier by providing a low impedance path for noise across an isolation barrier. The low impedance path can include a capacitive coupling between a patient ground, which is isolated from control circuitry, and a functional ground of an isolation system that is isolated from earth ground. The low impedance path can draw noise current from an input of an amplifier of patient circuitry.
摘要翻译：本公开通过在隔离屏障上提供用于噪声的低阻抗路径来提供医疗放大器的隔离。低阻抗路径可以包括与控制电路隔离的患者地面之间的电容耦合以及与地面隔离的隔离系统的功能接地。低阻抗路径可以从患者电路的放大器的输入端吸取噪声电流。

5. 发明公开

EP2779446A1 Voltage controlled amplifier and method of using the same 审中-公开
标题翻译： SpannungsgesteuerterVerstärkerund Verwendungsverfahrendafür
公开(公告)号：EP2779446A1
公开(公告)日：2014-09-17
申请号：EP14159694.0
申请日：2014-03-14
申请人： RGB Systems Inc.
发明人： Mendenhall, Eric , Huntington, Jared
IPC分类号： H03G1/00 , H03G3/30 , H03G7/00
CPC分类号： H03G3/004 , H03F1/26 , H03F1/3211 , H03F3/45076 , H03G1/0005 , H03G3/3005 , H03G7/002
摘要： A simplified VCA circuit is presented. The VCA of the present invention uses fewer components and is less complex than prior art OTA-based VCAs. Further, the VCA of the present invention has improved total harmonic distortion (THD) and DC offset characteristics as compared to prior art VCAs. The VCA may be used to prevent clipping with the addition of clipping detection circuitry.
摘要翻译：提出了一种简化的VCA电路。本发明的VCA使用更少的组件，并且比现有技术的基于OTA的VCA更不复杂。此外，与现有技术的VCA相比，本发明的VCA具有改进的总谐波失真（THD）和DC偏移特性。 VCA可以用于通过添加限幅检测电路来防止削波。

6. 发明授权

EP0685125B1 CROSS-CONDUCTION PREVENTION CIRCUIT FOR POWER AMPLIFIER OUTPUT STAGE 失效
标题翻译： CROSS-FLOW防止电路进行功率放大输出级
公开(公告)号：EP0685125B1
公开(公告)日：2002-03-20
申请号：EP95906040.1
申请日：1994-12-15
申请人： NATIONAL SEMICONDUCTOR CORPORATION
发明人： JOHNSON, Nicky, M.
IPC分类号： H03F1/32 , H03F3/30
CPC分类号： H03F3/3022 , H01L29/456 , H03F1/3217 , H03F3/3001 , H03F3/301 , H03F3/45076 , H03F3/45179 , H03F2200/27 , H03F2200/468 , H03F2200/477 , H03F2203/30006 , H03F2203/45188 , H03F2203/45192 , H03F2203/45224
摘要： A structure for preventing simultaneous conduction in the power transistors of an ouput circuit of an audio system includes an auxiliary device in each of the high side control and low side control circuits controlling the power transistors. The auxiliary device in the high side control circuit is turned on simultaneously with the high side power transistor to provide a control signal to the low side control circuit, thereby turning off the low side power transistor. Conversely, the auxiliary device in the low side control circuit is turned on simultaneously with the low side power transistor to provide a control signal to the high side control circuit, thereby turning off the high side power transistor. Thus, simultaneous conduction in the high and low side power transistors is prevented.

7. 发明授权

EP0584437B1 Transconductor stage 失效
标题翻译：跨导
公开(公告)号：EP0584437B1
公开(公告)日：2000-06-07
申请号：EP92830456.7
申请日：1992-08-26
申请人： STMicroelectronics S.r.l.
发明人： Castello, Rinaldo , Alini, Roberto , Rezzi, Francesco , Pisati, Valerio
IPC分类号： H03F1/32 , H03F3/45
CPC分类号： H03F1/3211 , H03F3/45076 , H03F3/45282

8. 发明公开

EP0886913A1 A CMOS MICROWAVE MULTIPHASE VOLTAGE CONTROLLED OSCILLATOR 失效
标题翻译：微波CMOS多相电压控制振荡器
公开(公告)号：EP0886913A1
公开(公告)日：1998-12-30
申请号：EP96937956
申请日：1996-11-20
申请人： NORTHERN TELECOM LTD
发明人： BROWN ANTHONY KEVIN DALE
IPC分类号： H03K3/0231 , H03B5/20 , H03B5/24 , H03B27/00 , H03F3/45 , H03H11/04 , H03H11/18
CPC分类号： H03H11/18 , H03B5/24 , H03B27/00 , H03F3/45076 , H03F2203/45201
摘要： A microwave differential amplifier comprises a first and a second matched NMOS device, each connected with the source to a common bias node, the gate to an input port for receiving a differential input signal and with the drains to an output port for providing a differential output signal. The Miller capacitors of each device provide the necessary feedback between the input ant output ports for shifting the phase of the differential output signal with respect to the phase of the differential input signal with 45° at a predetermined frequency. The operating point of the NMOS devices is maintained in the linear region of the respective transfer characteristic, using matched loads and a corresponding bias current. The loads may be resistors, in which case AGC is used for maintaining a constant bias current, or active loads. A VCO built with four such differential amplifiers in a gyrator configuration oscillates at the predetermined frequency and has eight output signals. The VCO may be used in circuits providing multiphase data regeneration where the number of data transitions exceeds the number of clock transitions in a given time period.

9. 发明公开

EP0862271A2 Komparatorschaltung 失效
公开(公告)号：EP0862271A2
公开(公告)日：1998-09-02
申请号：EP98102556.2
申请日：1998-02-13
申请人： SIEMENS AKTIENGESELLSCHAFT
发明人： Wachter, Franz, Dr.
IPC分类号： H03K5/24
CPC分类号： H03K5/2445 , H03F3/45076 , Y10T29/49769 , Y10T29/49776 , Y10T29/49778 , Y10T29/49829 , Y10T29/49929 , Y10T29/53052 , Y10T29/53065
摘要： Die Erfindung betrifft eine Komparatorschaltung, die vorteilhafterweise als Ansteuerschaltung bzw. Sensekomparator für einen nachgeschalteten Sägezahngenerator verwendet wird. Die Sensekomparatorschaltung weist einen antiparallel zum ersten Differenzverstärker geschalteten zweiten Differenzverstärker auf, eine Strommeßeinrichtung und Mittel zur Biasstromeinprägung. Im Normalbetrieb, das heißt während der Anstiegsflanke bzw. Abklingflanke eines Sägezahnsignals, wird die Komparatorschaltung lediglich von einem verhältnismäßig kleinen Stand-by-Strom versorgt. Nahe dem Umschaltpunkt des Sägezahnsignales wird dem kleinen Stand-by-Strom ein sehr viel größerer Biasstrom zugeschaltet. Da die Biasstromquelle nur im Umschaltpunkt des Sägezahnsignales einen Stromimpuls liefert, während der Taktflanken des Sägenzahnsignals aber ausgeschaltet bleibt, läßt sich auf diese Weise der Stromverbrauch der Komparatorschaltung drastisch minimieren. Auf diese Weise lassen sich vorteilhafterweise Komparatorschaltungen in SMT-Technologie, das heißt mit der geforderten Hochohmigkeit der Eingangstransistoren, realisieren.
摘要翻译：比较器电路包括至少两个差分放大器，电流测量装置，其耦合差分放大器的相应输出（A1，A2）并将输入信号（INp，INn）彼此进行比较。放大级（IS5，M15，IS6），在相等的输入信号下被激活，并切换可控偏置电流源（IS6）。至少一个差分放大器包括两个输入晶体管（M1，M2; M3，M4），其基极各自输入信号被提供，并且其集电极与电源电压源的第一极（V-）连接。电流镜电路（SS1，SS2）连接在第一和第二输入晶体管的集电极路径中。电流源（IS1，IS2）与第一和第二输入晶体管的发射极耦合，并与电源电压源的第二极（V +）连接。

10. 发明公开

EP0840951A2 AMPLIFIER WITH ACTIVE-BOOTSTRAPPED GAIN-ENHANCEMENT TECHNIQUE 失效
标题翻译：与ACTIVE BOOTSTRAP BOOST改良技术放大器
公开(公告)号：EP0840951A2
公开(公告)日：1998-05-13
申请号：EP97919574.0
申请日：1997-05-07
申请人： Philips Electronics N.V.
发明人： SEEVINCK, Evert , DU PLESSIS, Monuko
IPC分类号： H03F1 , H03F3
CPC分类号： H03F1/0261 , H03F3/45076 , H03F2203/45201
摘要： In a differential pair (P1, P2) actively loaded with a current mirror (N1, N2), a differential amplifier (A) drives the common terminal (Z) of the current mirror to force a zero voltage difference between the input terminal (X) and the output terminal (Y) of the current mirror. The voltage at the input terminal (X) is actively bootstrapped, via the differential amplifier (A), by the voltage of the output terminal (Y) with high precision. Thus a high voltage gain is obtained. A capacitor (CP) between the input terminal (X) and the control terminal (Z) compensates the local loop formed by the differential amplifier (A) and the input transistor (N1) of the current mirror, and forms a short circuit at high frequencies, thus reducing the active load of the differential pair to a conventional current mirror. For high frequencies the circuit has the same gain and phase properties as the standard non-bootstrapped approach and standard compensating techniques can be applied to the complete amplifier.

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