公开(公告)号：EP0948132A1

公开(公告)日：1999-10-06

申请号：EP98830192.5

申请日：1998-03-31

Applicant: STMicroelectronics S.r.l.

Inventor： Marchese, Stafano ,  Pisati, Valerio ,  Portaluri, Salvatore ,  Savo, Alessandro

IPC: H03G3/00 ,  H03G1/00 ,  H03G7/00

CPC classification number: H03G7/06 ,  H03G1/0023

Abstract: An amplifier with programmable gain and input linearity, comprising an input stage (10), which is suitable to receive a voltage signal (V + , V - ) and perform current conversion thereof with compression, and an output stage (30), which is connected to the input stage (10) and is suitable to decompress the signal in output from the input stage, producing gain amplification thereof; the particularity of the amplifier is the fact that it further comprises at least one current amplifier stage (20) which is interposed between the input stage (10) and the output stage (30) and comprises at least one bipolar transistor (21, 22) which is series-connected to a load diode (23, 24) and to a current source (2I 2 ); programmable means (I 2 , I 2 *) for reducing the transconductance of the load diode (23, 24) being provided in the at least one amplifier stage (20) to determine a programmable amplification factor for the gain of the amplifier.

Abstract translation: 具有可编程的增益和输入线性放大器，所有这些是适合于接收包括输入级的电压信号（10），（V <+> V < - >），并用其压缩进行电流转换，并且到输出级（30 ），所有这些是连接到输入级（10）和适用于从输入级输出到解压缩信号，产生它们的增益放大; 放大器的特殊性是它还包括factthat该输入级（10）和输出级（30）之间并且包括至少一个双极性晶体管（21，22）的至少一个电流放大器级（20）的所有 所有这一切都被串联连接到负载二极管（23，24）和电流源（2I2）; 可编程装置（I2，I2 *）用于减小负载二极管（23，24）在所述至少一个放大级（20）设置的跨导到确定性矿可编程放大因子用于放大器的增益。