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30 条记录 (耗时 0.017 秒)

    High frequency variable gain amplifier device
    21.
    发明公开
    High frequency variable gain amplifier device 失效
    Hochfrequenz-Verstärkervorrichtungmit variablerVerstärkung

    公开(公告)号：EP0847135A2

    公开(公告)日：1998-06-10

    申请号：EP97309816.3

    申请日：1997-12-04

    申请人： SONY CORPORATION

    发明人： Abe, Masayoshi ,  Oshiba, Katsuyuki

    IPC分类号： H03G3/30

    CPC分类号： H03F3/72 ,  H01Q11/12 ,  H03F1/0244 ,  H03F3/189 ,  H03F2200/222 ,  H03F2200/301 ,  H03F2200/387 ,  H03F2200/507 ,  H03F2200/54 ,  H03F2203/7227 ,  H03F2203/7239 ,  H03G1/0088 ,  H04W52/0209 ,  Y02D70/00

    摘要： To obtain a markedly more stable gain control range and to reduce power consumption with a smaller scale circuitry having simpler configuration for gain control, a high frequency variable gain amplifier comprises multi stage transistor amplifiers, a change-over switch circuit for controlling supplying and interruption of a power supply voltage, and a field effect transistor switch circuit with grounded-gate connection inserted in a bypass path midway across an input terminal and an output terminal. The source of this field effect transistor switch is in direct current-connection to the drain of a field effect transistor of the final stage transistor amplifier circuit. When a power supply voltage is supplied to each of the transistor amplifiers via the change-over switch circuit, the field effect transistor switch is turned "off" and when the power supply voltage is interrupted, the field effect transistor switch is tuned "on".

    摘要翻译： 为了获得明显更稳定的增益控制范围并且通过具有更简单的用于增益控制的配置的较小规模电路来降低功耗，高频可变增益放大器包括多级晶体管放大器，用于控制供应和中断的转换开关电路 电源电压，以及具有接地栅极连接的场效应晶体管开关电路，其插入在输入端子和输出端子的中途的旁路通路中。 该场效应晶体管开关的源极与最终级晶体管放大器电路的场效应晶体管的漏极直接电流连接。 当通过转换开关电路将电源电压提供给每个晶体管放大器时，场效应晶体管开关“截止”，当电源电压中断时，场效应晶体管开关被调谐为“接通” 。

    FLYBACK AMPLIFIER WITH DIRECT FEEDBACK
    22.
    发明授权
    FLYBACK AMPLIFIER WITH DIRECT FEEDBACK 有权

    公开(公告)号：EP2944018B1

    公开(公告)日：2018-10-31

    申请号：EP14737679.2

    申请日：2014-01-13

    申请人： Cognipower, LLC

    发明人： LAWSON, Thomas, E.

    IPC分类号： H03F1/02 ,  H02M3/335 ,  H03F3/21 ,  H03F3/217

    CPC分类号： H03F1/0205 ,  H02M3/33569 ,  H03F3/211 ,  H03F3/217 ,  H03F2200/301

    摘要： In at least one embodiment, the invention provides a bidirectional amplifier and method of control that enables immediate feedback directly from the output for fast response and low distortion. Mechanisms responsive to instantaneous feedback eliminate undershoot, overshoot, and sub-harmonic behavior. One embodiment comprises two switches and a single two-terminal inductor. Another embodiment produces a bipolar output from a single unregulated supply rail. The use of Predictive Energy Balancing controls yield high efficiency and low total harmonic distortion. These amplifiers are suited for audio application, and can drive piezo or dynamic speakers.

    FLYBACK AMPLIFIER WITH DIRECT FEEDBACK
    29.
    发明公开
    FLYBACK AMPLIFIER WITH DIRECT FEEDBACK 有权
    与直接反馈反相放大器

    公开(公告)号：EP2944018A1

    公开(公告)日：2015-11-18

    申请号：EP14737679.2

    申请日：2014-01-13

    申请人： Cognipower, LLC

    发明人： LAWSON, Thomas, E.

    IPC分类号： H02M3/335

    CPC分类号： H03F1/0205 ,  H02M3/33569 ,  H03F3/211 ,  H03F3/217 ,  H03F2200/301

    摘要： In at least one embodiment, the invention provides a bidirectional amplifier and method of control that enables immediate feedback directly from the output for fast response and low distortion. Mechanisms responsive to instantaneous feedback eliminate undershoot, overshoot, and sub-harmonic behavior. One embodiment comprises two switches and a single two-terminal inductor. Another embodiment produces a bipolar output from a single unregulated supply rail. The use of Predictive Energy Balancing controls yield high efficiency and low total harmonic distortion. These amplifiers are suited for audio application, and can drive piezo or dynamic speakers.

    Cascode amplifier
    30.
    发明公开
    Cascode amplifier 审中-公开
    Kaskodenverstärker

    公开(公告)号：EP1598932A1

    公开(公告)日：2005-11-23

    申请号：EP04102176.7

    申请日：2004-05-18

    申请人： STMicroelectronics S.r.l.

    发明人： COSENTINO, Gaetano ,  CALI', Giovanni ,  TORRISI, Felice ,  PELLERITI, Roberto

    IPC分类号： H03F1/22

    CPC分类号： H03F1/223 ,  H03F1/14 ,  H03F2200/301 ,  H03F2200/492 ,  H03F2200/72

    摘要： The present invention refers to a cascode amplifier suitable for amplifying a voltage signal present on the input terminal (IN). The amplifier comprises at least one first transistor (M11) comprising a non-drivable input terminal that coincides with the input terminal (IN) of the amplifier, a non-drivable output terminal and a drivable terminal connected to a first polarisation voltage (V3). The amplifier comprises in addition at least one second transistor (M2) comprising a non-drivable input terminal in common with the output terminal of the first transistor (M11), an output terminal (OUT) non-drivable connected to a second polarisation voltage (V1) and a drivable terminal. The amplifier also comprises a feedback element (Rf, C2) placed between the output terminal (OUT) of the second transistor (M2) and the drivable terminal of the first transistor (M11) and circuit means (Cff, 100) coupled between the drivable terminals of the first (M11) and of the second (M2) transistor and suitable for making the values of voltage on the drivable terminal and on the output terminal of the first transistor (M11) substantially the same (Fig. 3).

    摘要翻译： 本发明涉及一种适于放大输入端（IN）上存在的电压信号的共源共栅放大器。 放大器包括至少一个第一晶体管（M11），其包括与放大器的输入端（IN）重合的不可驱动的输入端子，不可驱动的输出端子和连接到第一极化电压（V3）的可驱动端子， 。 放大器还包括至少一个第二晶体管（M2），其包括与第一晶体管（M11）的输出端子共同的不可驱动的输入端子，不可驱动的输出端子（OUT）连接到第二极化电压（ V1）和可驱动的终端。 放大器还包括放置在第二晶体管（M2）的输出端（OUT）和第一晶体管（M11）的可驱动端子之间的反馈元件（Rf，C2）和耦合在可驱动的 （M11）和第二（M2）晶体管的端子，适于使第一晶体管（M11）的可驱动端子和输出端子上的电压值基本相同（图3）。