Anordnung zur Kompensation einer Offset-Spannung und Verfahren
    1.
    发明公开
    Anordnung zur Kompensation einer Offset-Spannung und Verfahren 审中-公开
    布置用于补偿偏移电压和方法

    公开(公告)号:EP3035528A1

    公开(公告)日:2016-06-22

    申请号:EP14199336.0

    申请日:2014-12-19

    发明人: Prochaska, Dirk

    摘要: Die Erfindung betrifft eine Anordnung (1) zur Kompensation einer Offset-Spannung (U off ) eines elektronischen Verstärkers (2), umfassend
    - einen elektronischen Verstärker (2) mit einem ersten Eingang (E+), einem zweiten Eingang (E-), einem ersten Ausgang (A+) und einem zweiten Ausgang (A-),
    - einem Eingangsschaltmittel (10),
    - einem Ausgangsschaltmittel (20),
    - einer Steuerschaltung (30),

    wobei die Eingangsschaltmittel (10) derart zwischen einem Signaleingang (X) und dem ersten Eingang (E+) und dem zweiten Eingang (E-) angeordnet sind, dass in einem ersten Schaltzustand (Z1) der erste Eingang (E+) mit dem Signaleingang (X) verbunden ist und in einem zweiten Schaltzustand (Z2) der zweite Eingang (E-) mit dem Signaleingang (X) verbunden ist, und wobei die Ausgangsschaltmittel (20) derart zwischen einem Signalausgang (Y) angeordnet sind, dass in dem ersten Schaltzustand (Z1) der erste Ausgang (A+) mit dem Signalausgang (Y) verbunden ist und in dem zweiten Schaltzustand (Z2) der zweite Ausgang (A-) mit dem Signalausgang (Y) verbunden ist, und wobei die Steuerschaltung (30) ausgestaltet ist das Eingangsschaltmittel (10) und das Ausgangsschaltmittel (20) synchron in den ersten Schaltzustand (Z1) bzw. in den zweiten Schaltzustand (Z2) zu schalten.

    摘要翻译: 本发明涉及一种装置(1)一种用于电子放大器的补偿的偏移电压(U关闭)(2),包括: - (2),具有第一输入端(E +),第二输入(E-)电子放大器,一 第一输出端(A +)和第二输出(O), - 输入切换装置(10), - 输出切换装置(20), - 一个控制电路(30),其中,所述输入切换装置设置在信号输入(X)和(10)之间 第一输入端(E +)和第二输入(E-)被布置成使得在第一切换状态(Z1),所述第一输入(E +)的信号输入(X)和在第二开关状态(Z2),第二输入( E-)被连接到信号输入(X),并且其中所述布置的信号输出(Y)之间的输出开关装置(20)被布置成使得(在连接到所述第一输出(+)到信号输出所述第一切换状态Z1)(Y) 以及在所述第二的第二切换状态(Z2) 输出(A)到信号输出(Y)连接,并且其中所述控制电路(30)在输入切换装置(10)和所述输出开关装置(20)同步地在所述第一开关状态(Z1)或配置(在第二切换状态Z2 切换)。

    AMPLIFIER SYSTEM
    4.
    发明公开
    AMPLIFIER SYSTEM 有权
    VERSTÄRKERSYSTEM

    公开(公告)号:EP3145216A1

    公开(公告)日:2017-03-22

    申请号:EP15185741.4

    申请日:2015-09-17

    申请人: NXP B.V.

    IPC分类号: H04R3/00 H03F3/45

    摘要: An amplifier system is described. The amplifier system may amplify an audio signal transmitted via a connected loudspeaker in a first mode of operation. In a second mode of operation the amplifier system may amplify a signal generated by the loudspeaker operated in reverse as a microphone. Because a loudspeaker is less sensitive than a microphone the amplifier system may be used to acquire audio at high sound pressure levels for example at a concert or while making a phone-call in a noisy environment for example with a high level of wind noise.

    摘要翻译: 描述放大器系统。 放大器系统可以放大在第一操作模式下通过连接的扬声器发送的音频信号。 在第二种操作模式中,放大器系统可以放大由作为麦克风反向操作的扬声器产生的信号。 因为扬声器比麦克风更不敏感,因此放大器系统可用于以高声压级获取音频,例如在音乐会或在噪声环境中进行电话呼叫,例如具有高水平的风噪声。

    Chopper amplifier
    5.
    发明公开
    Chopper amplifier 审中-公开
    Zerhackerverstärker

    公开(公告)号:EP2797230A2

    公开(公告)日:2014-10-29

    申请号:EP14164784.2

    申请日:2014-04-15

    IPC分类号: H03F3/393 H03F3/45

    摘要: A chopper amplifier includes a chopper modulator to modulate a certain detection signal and a bias voltage by a certain control signal and output a chopper modulation signal, a first differential amplifier to differentially amplify the chopper modulation signal from the chopper modulator and output a differential modulation signal, a chopper demodulator to demodulate the differential modulation signal from the first differential amplifier by the control signal and output a demodulation signal, a second differential amplifier to extract a detection signal component from the demodulation signal, and a plurality of filters connected at an input terminal of the second differential amplifier and having different cutoff frequencies from each other relative to the demodulation signal.

    摘要翻译: 斩波放大器包括:斩波调制器,用于通过一定的控制信号调制一定的检测信号和偏置电压,并输出斩波调制信号;第一差分放大器,对来自斩波调制器的斩波调制信号进行差分放大,并输出差分调制信号 斩波解调器,通过控制信号解调来自第一差分放大器的差分调制信号,并输出解调信号;第二差分放大器,从解调信号提取检测信号分量;以及多个滤波器,连接在输入端 的第二差分放大器,并且相对于解调信号具有彼此不同的截止频率。

    Biomedical amplifier circuit
    6.
    发明公开
    Biomedical amplifier circuit 失效
    生物医疗放大器电路

    公开(公告)号:EP0568197A3

    公开(公告)日:1994-09-21

    申请号:EP93302547.0

    申请日:1993-03-31

    IPC分类号: H03F1/30 H03F3/45

    摘要: In a mixed analog and digital integrated circuit for physiological signal instrumentation such as electrocardiographs, electromyographs, and electroencephalographs, an electronic differential amplifier comprises a chopper-stabilised first stage amplifier (402, 408, 412), a second stage amplifier (414) providing a negative output (418) and a positive output (416) to a chopper-stabilised feedback circuit (434-444), and a gain feedback circuit (420) which receives the negative output (418) and supplies a gain feedback voltage (24) to the first stage amplifier. The integrated circuit has five signal channels, each with analog amplification and analog to digital conversion. The channels can be configured for various combinations of input signal amplification, input signal summation, analog output driving, and AC impedance measurement. The integrated circuit has two digital serial input lines and two digital serial output lines, all designed for direct connection to optical couplers. Channel configuration, gain, and other parameters are externally controllable by a serial digital input signal. Up to six compatible devices can be serially connected in a chain.

    Biomedical amplifier circuit
    7.
    发明公开
    Biomedical amplifier circuit 失效
    BiomedizinischeVerstärkerschaltung。

    公开(公告)号:EP0568197A2

    公开(公告)日:1993-11-03

    申请号:EP93302547.0

    申请日:1993-03-31

    IPC分类号: H03F1/30 H03F3/45

    摘要: In a mixed analog and digital integrated circuit for physiological signal instrumentation such as electrocardiographs, electromyographs, and electroencephalographs, an electronic differential amplifier comprises a chopper-stabilised first stage amplifier (402, 408, 412), a second stage amplifier (414) providing a negative output (418) and a positive output (416) to a chopper-stabilised feedback circuit (434-444), and a gain feedback circuit (420) which receives the negative output (418) and supplies a gain feedback voltage (24) to the first stage amplifier. The integrated circuit has five signal channels, each with analog amplification and analog to digital conversion. The channels can be configured for various combinations of input signal amplification, input signal summation, analog output driving, and AC impedance measurement. The integrated circuit has two digital serial input lines and two digital serial output lines, all designed for direct connection to optical couplers. Channel configuration, gain, and other parameters are externally controllable by a serial digital input signal. Up to six compatible devices can be serially connected in a chain.

    摘要翻译: 在用于诸如心电图仪,肌电图和脑电图仪的生理信号仪器的混合模拟和数字集成电路中,电子差分放大器包括斩波稳定的第一级放大器(402,408,412),第二级放大器(414) 以及增益反馈电路(420),其接收所述负输出(418)并提供增益反馈电压(24),所述增益反馈电路(418)向所述斩波稳定反馈电路(434-444)提供负输出(418)和正输出(416) 到第一级放大器。 该集成电路有五个信号通道,每个通道具有模拟放大和模数转换。 通道可配置为输入信号放大,输入信号求和,模拟输出驱动和交流阻抗测量的各种组合。 集成电路具有两条数字串行输入线和两条数字串行输出线,全部设计用于直接连接光耦合器。 通道配置,增益和其他参数可通过串行数字输入信号进行外部控制。 多达六个兼容的设备可以串连在一起。

    RF power detector and detection method
    9.
    发明公开
    RF power detector and detection method 有权
    HF-Leistungsdetektor und Detektionsverfahren

    公开(公告)号:EP2854289A1

    公开(公告)日:2015-04-01

    申请号:EP13290233.9

    申请日:2013-09-30

    申请人: NXP B.V.

    IPC分类号: H03F3/19 H03F3/45 H04B10/69

    摘要: The invention provides an RF detection circuit and method using an envelope detector having an output connected to a first input of a differential amplifier and a reference storage capacitor to a second input of the differential amplifier. In a preferred implementation of the calibration mode, there is initial discharging of a reference storage capacitor, high speed charging of the reference storage capacitor until the differential amplifier output toggles, then slower discharging of the reference storage capacitor until the differential amplifier output toggles again. The resulting voltage is stored on the reference storage capacitor for use in a subsequent detection mode. This provides storage of an offset voltage which calibrates both the envelope detector differential amplifier functions.

    摘要翻译: 本发明提供一种使用包络检测器的RF检测电路和方法,该包络检测器具有连接到差分放大器的第一输入端的输出端和参考存储电容器到差分放大器的第二输入端。 在校准模式的优选实施方式中,存在参考存储电容器的初始放电,参考存储电容器的高速充电直到差分放大器输出切换,然后慢速放电参考存储电容器直到差分放大器输出再次切换。 所得到的电压被存储在参考存储电容器上,用于后续检测模式。 这提供了一个校准两个包络检测器差分放大器功能的偏移电压的存储。

    System and method for a programmable gain amplifier
    10.
    发明公开
    System and method for a programmable gain amplifier 有权
    System und Verfahrenfüreinen programmierbarenVerstärker

    公开(公告)号:EP1331732A2

    公开(公告)日:2003-07-30

    申请号:EP03001574.7

    申请日:2003-01-23

    发明人: Sobel, David A.

    IPC分类号: H03G3/00

    摘要: Provided is system for an improved programmable gain amplifier (PGA). The system includes an amplifier and a first gain control mechanism. The first gain control mechanism includes a circuit input port and is positioned along a feedback path of the amplifier. The first gain control mechanism is configured to (i) receive an input signal and (ii) moderate gains applied to the received input signal, the applied gains including gain values of greater than or equal to one. A second gain control mechanism is coupled to the first gain control mechanism and is integrated with a function of the amplifier. The second gain control mechanism (i) provides gain values of less than one and (ii) decreases a feedback factor of the amplifier when the gain values are provided having values of less than one.

    摘要翻译: 提供了一种改进的可编程增益放大器(PGA)的系统。 该系统包括放大器和第一增益控制机构。 第一增益控制机构包括电路输入端口并且沿着放大器的反馈路径定位。 第一增益控制机制被配置为(i)接收输入信号和(ii)适用于接收的输入信号的中等增益,所施加的增益包括大于或等于1的增益值。 第二增益控制机构耦合到第一增益控制机构,并与放大器的功能集成。 第二增益控制机构(i)提供小于1的增益值,以及(ii)当提供具有小于1的增益值时,减小放大器的反馈因数。