公开(公告)号：US20080119154A1

公开(公告)日：2008-05-22

申请号：US11933504

申请日：2007-11-01

申请人： Il-Ku NAM ,  Byeong-Ha PARK ,  Jong-Dae BAE ,  Jung-Wook HEO ,  Ho-Jung JU ,  Hyun-Won MUN ,  Jeong-Hyun CHOI

发明人： Il-Ku NAM ,  Byeong-Ha PARK ,  Jong-Dae BAE ,  Jung-Wook HEO ,  Ho-Jung JU ,  Hyun-Won MUN ,  Jeong-Hyun CHOI

IPC分类号： H03F3/45 ,  H04B1/16

CPC分类号： H03F3/19 ,  H03F1/32 ,  H03F2200/294 ,  H03G1/0029 ,  H03G1/0088

摘要： A programmable variable gain amplifier includes at least three amplifiers. A first amplifier is configured to amplify an input signal. A second amplifier, which includes a programmable output load stage, is configured to receive an output signal from the first amplifier and to output a first differential output signal. The output load stage includes multiple first switches and multiple first diode-connected transistors that are open-circuited or short-circuited by the first switches. A third amplifier, which includes a programmable current mirror input stage, is configured to receive the first differential output signal from the second amplifier through the current mirror input stage and to output a second differential output signal. The current mirror input stage includes multiple second switches and multiple second transistors that are open-circuited or short-circuited by the plurality of second switches. The second transistors respectively form current mirrors with the first diode-connected transistors corresponding to the second transistors.

摘要翻译： 可编程可变增益放大器包括至少三个放大器。 第一放大器被配置为放大输入信号。 包括可编程输出负载级的第二放大器被配置为从第一放大器接收输出信号并输出​​第一差分输出信号。 输出负载级包括由第一开关断开或短路的多个第一开关和多个第一二极管连接的晶体管。 包括可编程电流镜输入级的第三放大器被配置为通过电流镜输入级从第二放大器接收第一差分输出信号并输出​​第二差分输出信号。 电流反射镜输入级包括多个第二开关和由多个第二开关断路或短路的多个第二晶体管。 第二晶体管分别形成与第二晶体管对应的第一二极管连接的晶体管的电流镜。