公开(公告)号：US20120133438A1

公开(公告)日：2012-05-31

申请号：US13297639

申请日：2011-11-16

申请人： Hiroshi TSUCHI ,  Sensuke KIMURA

发明人： Hiroshi TSUCHI ,  Sensuke KIMURA

IPC分类号： H03F3/45

CPC分类号： H03F3/45219 ,  G09G3/20 ,  G09G2310/027 ,  G09G2310/0291

摘要： A differential amplifier has an interpolating function and has: first and second differential pairs including transistors of a first conductivity type; third and fourth differential pairs including transistors of a second conductivity type; first and second current sources providing operating currents to the first and second differential pairs; third and fourth current sources providing operating currents to the third and fourth differential pairs; a first control circuit which controls, in a first operating range where the amounts of currents flowing through the first and second differential pairs become smaller, respectively, a changing point at which the operating current of the first differential pair changes; and a second control circuit which controls, in a second operating range where the amounts of currents flowing through the third and fourth differential pairs become smaller, respectively, a changing point at which the operating current of the fourth differential pair changes.

摘要翻译： 差分放大器具有内插功能，并具有：第一和第二差分对，包括第一导电类型的晶体管; 第三和第四差分对，包括第二导电类型的晶体管; 第一和第二电流源向第一和第二差分对提供工作电流; 向第三和第四差分对提供工作电流的第三和第四电流源; 第一控制电路，其控制在第一工作范围内流过第一和第二差动对的电流量变小，第一差动对的工作电流变化的变化点; 以及第二控制电路，其在分别流过第三和第四差分对的电流量变小的第二工作范围内分别控制第四差分对的工作电流变化的变化点。