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公开(公告)号:EP1231712A2
公开(公告)日:2002-08-14
申请号:EP02075529.4
申请日:2002-02-07
Applicant: STMicroelectronics S.r.l.
Inventor: Filoramo, Pietro , Chiarillo, Tiziano
IPC: H03G7/08
CPC classification number: H03G7/08
Abstract: A variable gain amplifier is described which comprises a first device to which a first control signal (Vc, Vcl) is applied so that the gain (Ail, Ai) of an output signal (iout, io) of the first device (11, 22, Q45-Q48) with respect to a first input signal (in, il, ir) is a function of the exponential type of the first control signal (Vc, Vcl). The amplifier comprises a feedback network (25, Q51-Q58) connected between an output terminal and an input terminal of the first device (22, Q45-Q48) so as to assure that the gain (Ai) in decibel of the first device (22, Q45-Q48) is a linear function of the first control signal (Vcl).
Abstract translation: 描述了可变增益放大器,其包括施加第一控制信号(Vc,Vcl)的第一装置,使得第一装置(11,22)的输出信号(iout,io)的增益(Ail,Ai) ,Q45-Q48)相对于第一输入信号(in,il,ir)是第一控制信号(Vc,Vcl)的指数类型的函数。 放大器包括连接在第一装置(22,Q45-Q48)的输出端子和输入端子之间的反馈网络(25,Q51-Q58),以便确保第一装置的分贝的增益(Ai)( 22,Q45-Q48)是第一控制信号(Vcl)的线性函数。
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公开(公告)号:EP1231712A3
公开(公告)日:2004-04-28
申请号:EP02075529.4
申请日:2002-02-07
Applicant: STMicroelectronics S.r.l.
Inventor: Filoramo, Pietro , Chiarillo, Tiziano
IPC: H03G7/08
CPC classification number: H03G7/08
Abstract: A variable gain amplifier is described which comprises a first device to which a first control signal (Vc, Vcl) is applied so that the gain (Ail, Ai) of an output signal (iout, io) of the first device (11, 22, Q45-Q48) with respect to a first input signal (in, il, ir) is a function of the exponential type of the first control signal (Vc, Vcl). The amplifier comprises a feedback network (25, Q51-Q58) connected between an output terminal and an input terminal of the first device (22, Q45-Q48) so as to assure that the gain (Ai) in decibel of the first device (22, Q45-Q48) is a linear function of the first control signal (Vcl).
Abstract translation: 描述了一种可变增益放大器,其包括施加有第一控制信号(Vc,Vc1)的第一设备,使得第一设备(11,22)的输出信号(iout,io)的增益(Ail,Ai) ,Q45-Q48)相对于第一输入信号(in,il,ir)是第一控制信号(Vc,Vcl)的指数型的函数。 该放大器包括连接在第一设备(22,Q45-Q48)的输出端和输入端之间的反馈网络(25,Q51-Q58),以确保第一设备的分贝增益(Ai) 22,Q45-Q48)是第一控制信号(Vcl)的线性函数。
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