公开(公告)号：US20080272844A1

公开(公告)日：2008-11-06

申请号：US12174102

申请日：2008-07-16

申请人： Surapap RAYANAKORN ,  Robert C. Dobkin ,  Brendan J. Whelan

发明人： Surapap RAYANAKORN ,  Robert C. Dobkin ,  Brendan J. Whelan

IPC分类号： H03F3/45 ,  H03F1/14

CPC分类号： H03F1/483 ,  H03F3/3022 ,  H03F3/45192 ,  H03F2200/36 ,  H03F2200/513 ,  H03F2203/30033 ,  H03F2203/45302 ,  H03F2203/45512

摘要： A class AB folded-cascode amplifier having improved gain-bandwidth product, comprises a differential input circuit including a differential transistor pair coupled to a source of tail current and responsive to a differential input signal for conducting a first current, a cascode circuit coupled to the differential input circuit for supplying a second current thereto, and a class AB output stage. A compensation circuit is configured for feeding back mutually complementary compensation signals from an output node to the differential input circuit. Another compensation circuit is configured for feeding back a signal from the output of the output stage to the input of the output stage.

摘要翻译： 具有改进的增益带宽乘积的AB类折叠共源共栅放大器包括差分输入电路，差分输入电路包括耦合到尾电流源的差分晶体管对，并响应用于传导第一电流的差分输入信号，耦合到 用于提供第二电流的差分输入电路和AB类输出级。 补偿电路被配置为将相互补偿的补偿信号从输出节点反馈到差分输入电路。 另一个补偿电路被配置为将信号从输出级的输出反馈到输出级的输入端。