公开(公告)号：WO2009037625A2

公开(公告)日：2009-03-26

申请号：PCT/IB2008/053721

申请日：2008-09-15

Applicant: NXP B.V. ,  BOUHAMAME, Mohamed ,  LOCOCO, Luca ,  ROBERT, Sebastien

Inventor： BOUHAMAME, Mohamed ,  LOCOCO, Luca ,  ROBERT, Sebastien

CPC classification number: H03F3/50 ,  H03F1/26 ,  H03F1/32 ,  H03F1/34 ,  H03F1/56 ,  H03F3/195 ,  H03F3/45475 ,  H03F2200/144 ,  H03F2200/213 ,  H03F2200/378 ,  H03F2200/408 ,  H03F2200/411 ,  H03F2200/435 ,  H03F2200/451 ,  H03F2203/45136 ,  H03F2203/45522 ,  H03F2203/5006 ,  H03F2203/5021 ,  H03F2203/5024 ,  H03F2203/5031 ,  H03F2203/5036 ,  H03F2203/5039 ,  H03G5/14 ,  H03H11/1213 ,  H03H11/1291

Abstract: A tunable RF filter, comprising: an emitter follower stage (2); and a common emitter stage (4); the common emitter stage (4) providing feedback to the emitter follower stage (2). The common emitter stage (4) may comprise a first transistor (Ti) being the only transistor of the common emitter stage (4); and the emitter follower stage (2) may comprise a second transistor (T2) being the only transistor of the emitter follower stage (2). A further tunable RF filter provides improved linearity, comprising: an emitter follower stage (22); a joint common emitter and emitter follower stage (24); and a gain stage (26); a common emitter output of the joint common emitter and emitter follower stage (24) providing feedback to the emitter follower stage (22), and an emitter follower output of the joint common emitter and emitter follower stage (24) providing an input to the gain stage (26).

Abstract translation: 一种可调RF滤波器，包括：射极跟随器级（2）; 和公共发射极级（4）; 公共发射极级（4）向射极跟随器级（2）提供反馈。 公共发射极级（4）可以包括作为公共发射极级（4）的唯一晶体管的第一晶体管（Ti）; 并且射极跟随器级（2）可以包括作为射极跟随器级（2）的唯一晶体管的第二晶体管（T2）。 另一可调RF滤波器提供改进的线性，包括：射极跟随器级（22）; 一个共同的发射极和发射极跟随器级（24）; 和增益级（26）; 连接公共发射极和射极跟随器级（24）的公共发射极输出端向射极跟随器级（22）提供反馈，并且连接公共发射极和射极跟随器级（24）的射极跟随器输出端提供增益 阶段（26）。

公开(公告)号：WO2009037625A3

公开(公告)日：2009-07-23

申请号：PCT/IB2008053721

申请日：2008-09-15

Applicant: NXP BV ,  BOUHAMAME MOHAMED ,  LOCOCO LUCA ,  ROBERT SEBASTIEN

Inventor： BOUHAMAME MOHAMED ,  LOCOCO LUCA ,  ROBERT SEBASTIEN

IPC: H03H11/12 ,  H03F1/34 ,  H03F3/195 ,  H03F3/50

CPC classification number: H03F3/50 ,  H03F1/26 ,  H03F1/32 ,  H03F1/34 ,  H03F1/56 ,  H03F3/195 ,  H03F3/45475 ,  H03F2200/144 ,  H03F2200/213 ,  H03F2200/378 ,  H03F2200/408 ,  H03F2200/411 ,  H03F2200/435 ,  H03F2200/451 ,  H03F2203/45136 ,  H03F2203/45522 ,  H03F2203/5006 ,  H03F2203/5021 ,  H03F2203/5024 ,  H03F2203/5031 ,  H03F2203/5036 ,  H03F2203/5039 ,  H03G5/14 ,  H03H11/1213 ,  H03H11/1291

Abstract: A tunable RF filter, comprising: an emitter follower stage (2); and a common emitter stage (4); the common emitter stage (4) providing feedback to the emitter follower stage (2). The common emitter stage (4) may comprise a first transistor (Ti) being the only transistor of the common emitter stage (4); and the emitter follower stage (2) may comprise a second transistor (T2) being the only transistor of the emitter follower stage (2). A further tunable RF filter provides improved linearity, comprising: an emitter follower stage (22); a joint common emitter and emitter follower stage (24); and a gain stage (26); a common emitter output of the joint common emitter and emitter follower stage (24) providing feedback to the emitter follower stage (22), and an emitter follower output of the joint common emitter and emitter follower stage (24) providing an input to the gain stage (26).

Abstract translation: 一种可调谐RF滤波器，包括：射极跟随器级（2）; 和共同发射极级（4）; 所述公共发射极级（4）向所述射极跟随器级（2）提供反馈。 公共发射极级（4）可以包括作为公共发射极级（4）的唯一晶体管的第一晶体管（Ti）。 并且射极跟随器级（2）可以包括作为射极跟随器级（2）的唯一晶体管的第二晶体管（T2）。 另一可调谐RF滤波器提供改进的线性度，包括：射极跟随器级（22）; 共同的发射极和射极跟随器级（24）; 和增益阶段（26）; 联合共发射极和射极跟随器级（24）的共发射极输出，为射极跟随器级（22）提供反馈，以及联合公共发射极和射极跟随器级（24）的射极跟随器输出，为增益提供输入 阶段（26）。