公开(公告)号：US20020097093A1

公开(公告)日：2002-07-25

申请号：US10020010

申请日：2001-12-13

Applicant: STMicroelectronics S.A.

Inventor： Jerome Bourgoin ,  Frederic Goutti

IPC: H03F003/45

CPC classification number: H03G1/0035

Abstract: An amplifier includes an input stage with one or more input terminals for receiving a signal to be amplified, and an output terminal. An inverting gain stage includes an input terminal connected to the output terminal of the input stage, an output terminal for delivering an amplified signal, and a variable feedback resistor connected between the output terminal and input terminal thereof. The input stage is a transconductor stage biased by a current source. A transconductance thereof is set by a resistor of the current source so that the amplifier has a gain proportional to the product of the variable feedback resistor multiplied by the transconductance.

Abstract translation: 放大器包括具有用于接收要放大的信号的一个或多个输入端的输入级和输出端。 反相增益级包括连接到输入级的输出端的输入端，输出放大信号的输出端和连接在输出端和输入端之间的可变反馈电阻。 输入级是由电流源偏置的跨导级。 其跨导由电流源的电阻器设置，使得放大器具有与可变反馈电阻乘以跨导的乘积成比例的增益。

公开(公告)号：US20020089371A1

公开(公告)日：2002-07-11

申请号：US10010770

申请日：2001-12-06

Applicant: STMicroelectronics S.A.

Inventor： Frederic Goutti ,  Jerome Bourgoin

IPC: G05F001/10

CPC classification number: G05F3/265

Abstract: A pair of complementary current sources includes a reference current source, and two complementary current mirrors having the same number of branches provided with bipolar mirror transistors. The bases of the mirror transistors of the complementary mirrors are connected to a common node. One of the complementary mirrors is connected to the reference source. An intermediate current mirror includes a first slave branch connected to the other complementary current mirror, a second slave branch connected to the reference source, and a master branch connected to the output of a trimming circuit for trimming the complementary currents for substantially equalizing the base currents of the mirror transistors of the complementary current mirrors. The input of the trimming circuit is connected to the common node.

Abstract translation: 一对互补电流源包括参考电流源，以及具有与双极镜晶体管相同数量的分支的两个互补电流镜。 互补反射镜的镜像晶体管的基极连接到公共节点。 其中一个互补镜像连接到参考源。 中间电流镜包括连接到另一个互补电流镜的第一从分支，连接到参考源的第二从分支，以及连接到微调电路的输出的主分支，用于微调互补电流以使基极电流基本均衡 的互补电流镜的镜像晶体管。 修整电路的输入连接到公共节点。