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）。