公开(公告)号：ITTO20120145A1

公开(公告)日：2013-08-18

申请号：ITTO20120145

申请日：2012-02-17

Applicant: ST MICROELECTRONICS SRL

Inventor： BALDO LORENZO ,  CHIRICOSTA MARIO ,  MAIORE MARIO ,  ROSE PAUL GEORGES MARIE ,  VAIANA MICHELE

公开(公告)号：DE602007010249D1

公开(公告)日：2010-12-16

申请号：DE602007010249

申请日：2007-05-18

Applicant: ST MICROELECTRONICS SA ,  ST MICROELECTRONICS SRL

Inventor： CHIRICOSTA MARIO ,  SIRITO-OLIVIER PHILIPPE ,  CALO' PIETRO ANTONIO PAOLO

IPC: H03M1/12

公开(公告)号：IT201700045616A1

公开(公告)日：2018-10-27

申请号：IT201700045616

申请日：2017-04-27

Applicant: ST MICROELECTRONICS SRL

Inventor： VAIANA MICHELE ,  PESENTI PAOLO ,  CHIRICOSTA MARIO ,  IPPOLITO CALOGERO MARCO ,  MAIORE MARIO

公开(公告)号：ITMI20131273A1

公开(公告)日：2015-01-31

申请号：ITMI20131273

申请日：2013-07-30

Applicant: ST MICROELECTRONICS SRL

Inventor： CHIRICOSTA MARIO ,  IPPOLITO CALOGERO MARCO ,  MAIORE MARIO ,  PELUSO ORLANDO ,  VAIANA MICHELE GIOVANNI

公开(公告)号：ITTO20130347A1

公开(公告)日：2014-10-30

申请号：ITTO20130347

申请日：2013-04-29

Applicant: ST MICROELECTRONICS SRL

Inventor： CHIRICOSTA MARIO ,  IPPOLITO CALOGERO MARCO

公开(公告)号：DE602005007857D1

公开(公告)日：2008-08-14

申请号：DE602005007857

申请日：2005-04-14

Applicant: ST MICROELECTRONICS SA ,  ST MICROELECTRONICS SRL

Inventor： CHIRICOSTA MARIO ,  SIRITO-OLIVIER PHILIPPE

IPC: H03G1/00

Abstract: A variable-gain amplifier includes an amplifier stage (17); an attenuating network (14a, 14b) receiving an input signal (V I ) ; a plurality of transconductance stages (15), connected between respective nodes (14a1, 14a2, ..., 14aN, 14b1, 14b2, ..., 14bN) of the attenuating network (14a, 14b) and the amplifier stage (17), wherein each of the transconductance stages (15) has a differential circuit (20), configured to supply differential currents (I D1 , I D2 ) to the amplifier stage (17); and a gain-control circuit (16) for controlling the transconductance stages (15) according to an electrical control quantity (V c ). Each of the transconductance stages (15) further includes a current-divider circuit (21) associated to the differential circuit (20) and controlled by the gain-control circuit (16) so as to divide the differential currents (I D1 , I D2 ) between the amplifier stage (17) and a dispersion line (33) proportionally to the control quantity (V C ).