公开(公告)号：US06885245B2

公开(公告)日：2005-04-26

申请号：US10408253

申请日：2003-04-08

Applicant: Zhong-Ding Liu

Inventor： Zhong-Ding Liu

IPC: H03F3/45

CPC classification number: H03F3/45179 ,  H03F2203/45644

Abstract: A differential amplifier. A differential pair constructed by a first transistor and the second transistor receives differential input signals. The gate terminals of a third and fourth transistor are coupled to the source terminals of the fourth transistor and the third transistor respectively, and the third and fourth transistor construct a feedback device. This feedback device provides a positive feedback to the differential pair in the differential mode, thereby increasing AC amplitude of the differential amplifier. Further this feedback device substantially brings the drain currents of the first current path and the second current path into coincidence in the Vcom mode.

Abstract translation: 差分放大器。 由第一晶体管和第二晶体管构成的差分对接收差分输入信号。 第三和第四晶体管的栅极端子分别耦合到第四晶体管和第三晶体管的源极端子，第三和第四晶体管构成反馈器件。 该反馈装置在差分模式中向差分对提供正反馈，从而增加差分放大器的交流振幅。 此外，该反馈装置在Vcom模式中基本上使第一电流路径和第二电流路径的漏极电流一致。

公开(公告)号：US06980050B2

公开(公告)日：2005-12-27

申请号：US10935215

申请日：2004-09-08

Applicant: Zhong-Ding Liu

Inventor： Zhong-Ding Liu

IPC: H03F3/45

CPC classification number: H03F3/45179 ,  H03F2203/45644

Abstract: A differential amplifier. A differential pair constructed by a first transistor and the second transistor receives differential input signals. The gate terminals of a third and fourth transistor are coupled to the source terminals of the fourth transistor and the third transistor respectively, and the third and fourth transistor construct a feedback device. This feedback device provides a positive feedback to the differential pair in the differential mode, thereby increasing AC amplitude of the differential amplifier. Further this feedback device substantially brings the drain currents of the first current path and the second current path into coincidence in the Vcom mode.

公开(公告)号：US20050030095A1

公开(公告)日：2005-02-10

申请号：US10935215

申请日：2004-09-08

Applicant: Zhong-Ding Liu

Inventor： Zhong-Ding Liu

IPC: H03F3/45

CPC classification number: H03F3/45179 ,  H03F2203/45644

Abstract: A differential amplifier. A differential pair constructed by a first transistor and the second transistor receives differential input signals. The gate terminals of a third and fourth transistor are coupled to the source terminals of the fourth transistor and the third transistor respectively, and the third and fourth transistor construct a feedback device. This feedback device provides a positive feedback to the differential pair in the differential mode, thereby increasing AC amplitude of the differential amplifier. Further this feedback device substantially brings the drain currents of the first current path and the second current path into coincidence in the Vcom mode.