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    Circuit for detecting distortion in an amplifier, in particular an audio amplifier
    2.
    发明公开
    Circuit for detecting distortion in an amplifier, in particular an audio amplifier 有权
    电路，用于检测所述失真放大器中的，特别是在音频放大器

    公开(公告)号：EP1164695A1

    公开(公告)日：2001-12-19

    申请号：EP00830419.8

    申请日：2000-06-13

    Applicant: STMicroelectronics S.r.l.

    Inventor： Brambilla, Davide ,  Nebuloni, Daniela ,  Cleris, Mauro

    IPC: H03F1/34 ,  H03F1/32

    CPC classification number: H03F1/3217 ,  H03F1/34

    Abstract: The amplifier (1, 2) has an input (2a); an output (2c) supplying an output signal (Vo), and a feedback network (5) connected between the input (2a) and the output (2c), and a distortion detection circuit (1). The feedback network (5; 55) includes a first and a second feedback element (6, 7) arranged in series and forming an intermediate node (10) supplying an intermediate signal (VB) in phase with the output signal (Vo) in absence of distortion, and in phase-opposition with the output signal in presence of distortion. The distortion detection circuit (1) includes a phase-comparating circuit (12, 15) which detects the phase of the output signal (Vo) and of the intermediate signal (VB), and generates a distortion-indicative signal (VCD), when the intermediate signal (VB) is in phase opposition with respect to the output signal (Vo).

    Abstract translation: 放大器（1,2）具有在输入端（2a）的; 到输出（2C）提供给连接在所述输入端（2a）的间输出信号（VO），和一个反馈网络（5）和输出（2C），和一失真检测电路（1）。 反馈网络（5; 55）包括第一和第二反馈元件（6,7）串联布置并且在中间节点（10）形成在相供给到中间信号（VB）与在不存在的输出信号（VO） 失真的，并且在相反对与失真的存在的输出信号。 失真检测电路（1）包括相comparating电路（12，15），其检测所述输出信号（VO）的相位和中间信号的（VB），及基因率失真指示信号（VCD），当 中间信号（VB）是在相对于所述输出信号（VO）反相。

    A method of preventing cross-conductions and interactions between supply lines of a device and a circuit for limiting the voltage difference between two regulated output voltages
    5.
    发明公开
    A method of preventing cross-conductions and interactions between supply lines of a device and a circuit for limiting the voltage difference between two regulated output voltages 审中-公开
    过程用于交叉流动和防止用于山地供给线和电路之间的相互作用Renzen两个被调节的输出电压之间的电压差

    公开(公告)号：EP1564617A1

    公开(公告)日：2005-08-17

    申请号：EP04425088.4

    申请日：2004-02-11

    Applicant: STMicroelectronics S.r.l.

    Inventor： Brambilla, Davide ,  Nebuloni, Daniela

    IPC: G05F1/56

    CPC classification number: G05F1/56

    Abstract: In a device that includes a pair of closed-loop voltage regulators each comprising an input transconductance stage receiving a reference voltage and a feedback voltage, an intermediate transresistance stage, an output buffer operatively in cascade for generating on an output node the regulated output voltage and negative feedback means for providing the feedback voltage to the input stage, the method of this invention may be implemented by a circuit that limits the difference between two output regulated voltages.
    The limiting circuit comprises at least a differential transconductance amplifier input with voltages proportional to the output voltages of the regulators or obtained by adding an offset voltage to the output voltage of the regulators for injecting in or draining from an input node of the intermediate stage of one of the regulators a current in function of the relative unbalance of the differential transconductance amplifier.

    Abstract translation: 在的装置做了包括一对闭环电压调节器输入跨导级的每个包括：接收一参考电压，并在中间跨电阻级的反馈电压，以可操作地输出缓冲器在级联在输出节点处的调节的输出电压生成并 负反馈装置，用于提供反馈电压到输入级，本发明的方法可以通过一个电路限制做调节两个输出电压之间的差来实现。 的限制电路包括至少相电压成比例的调节器的输出电压或通过添加到偏移电压的稳压器的输出电压为注入或从在所述输入节点排水得到的差分跨导放大器的输入 调节器在差分跨导放大器的相对不平衡的函数的电流的一个的中间阶段。

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