公开(公告)号：US20080018401A1

公开(公告)日：2008-01-24

申请号：US11775105

申请日：2007-07-09

申请人： Hoang Duong QUOC ,  Sang LEE ,  Jeong KIM ,  Tah PARK ,  Eung KIM

发明人： Hoang Duong QUOC ,  Sang LEE ,  Jeong KIM ,  Tah PARK ,  Eung KIM

IPC分类号： H03F3/45

CPC分类号： H03F3/45188 ,  H03F3/45632 ,  H03F2200/447 ,  H03F2200/456 ,  H03F2203/45466 ,  H03F2203/45482 ,  H03F2203/45641 ,  H03F2203/45654 ,  H03F2203/45681 ,  H03G1/0023

摘要： A variable gain amplifier including: a differential amplification unit amplifying and outputting a difference between a first input signal and a second input signal inputted via a first input terminal and a second input terminal, respectively, according to a first bias current of the first input terminal and second input terminal, to a first output terminal and a second output terminal; a diode-connected load unit comprising loads diode-connected to the first output terminal and second output terminal, respectively, the load receiving a second bias current; and a gain control unit controlling a gain between the input terminals and the output terminals of the differential amplification unit by controlling the size of the first bias current and second bias current.

摘要翻译： 一种可变增益放大器，包括：差分放大单元，根据第一输入端子的第一偏置电流，分别放大并输出经由第一输入端子和第二输入端子输入的第一输入信号和第二输入信号之间的差值 和第二输入端，连接到第一输出端和第二输出端; 二极管连接的负载单元，分别包括负载二极管连接到第一输出端子和第二输出端子，负载接收第二偏置电流; 以及增益控制单元，通过控制第一偏置电流和第二偏置电流的大小来控制差分放大单元的输入端子和输出端子之间的增益。