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1.发明公开
公开(公告)号：EP1292021A2
公开(公告)日：2003-03-12
申请号：EP02102214.0
申请日：2002-08-23
发明人： Madni, Arshad , Lauria, Franco , Cowley, Nicholas, Paul , Trodd, Lance, Rhys , Mudd, Mark, Stephen, John
IPC分类号： H03F3/45
CPC分类号： H03F3/45089 , H03F2203/45392 , H03F2203/45496 , H03F2203/45612
摘要： A radio frequency amplifier comprises a long tail pair of transistors 1, 2 provided with a tail current source 8, 9. The bases of the transistors 1 and 2 are driven by emitter followers comprising transistors 20 and 21 provided with collector load resistors 24 and 25. Feedback capacitors 26 and 27 ensure stability and feedback resistors 28, 29 bias the amplifier without degrading noise performance. The amplifier may be driven unbalanced while retaining good second harmonic distortion performance.
摘要翻译： 射频放大器包括设置有尾电流源8,9的长尾对晶体管1,2，晶体管1和2的基极由发射极跟随器驱动，晶体管20和21设置有集电极负载电阻24和25 反馈电容器26和27确保稳定性，并且反馈电阻器28,29偏置放大器而不降低噪声性能。 放大器可能被驱动不平衡，同时保持良好的二次谐波失真性能。
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公开(公告)号：EP1195889A3
公开(公告)日：2004-01-28
申请号：EP01307369.7
申请日：2001-08-30
IPC分类号： H03D7/18
摘要： An analogue single conversion tuner comprises a plurality of channels (1, 2, 3) for covering the whole of a desired reception bandwidth. Each tuner comprises an image reject mixer (18) connected to the tuner input (4) by a single tracking filter (16), for example of the single-tuned type.
摘要翻译： 模拟单一转换调谐器包括用于覆盖整个期望的接收带宽的多个信道（1,2,3）。 每个调谐器包括通过例如单调谐类型的单个跟踪滤波器（16）连接到调谐器输入（4）的图像抑制混频器（18）。
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公开(公告)号：EP1231709A1
公开(公告)日：2002-08-14
申请号：EP02250099.5
申请日：2002-01-08
发明人： Madni, Arshad , Mudd, Mark
IPC分类号： H03F3/45
CPC分类号： H03G1/0023 , H03F3/45085 , H03F2200/294 , H03F2200/372
摘要： A radio frequency amplifier of improved intermodulation performance is provided by connecting first and second transconductance amplifiers (T3, T4, T5, T6, R3, R4, R5, R6) in antiphase so that third order intermodulation products cancel each other but the reduction in gain is relatively small. The transconductance stages comprise long tail pairs of transistors (T3, T4, T5, T6) provided with tail current sources formed by transistors (T1, T2) whose bases are connected to a bias voltage source (1). The first transistor (T1) has an emitter connected via a resistor (R1) to ground. The second transistor (T2) has an emitter connected via another resistor (R2) to the emitter of the first transistor (T1).
摘要翻译： 通过将第一和第二跨导放大器（T3，T4，T5，T6，R3，R4，R5，R6）反相连接来提供改善的互调性能的射频放大器，使得三阶互调产物相互抵消但增益的减小 比较小 跨导级包括提供有由基极连接到偏置电压源（1）的晶体管（T1，T2）形成的尾电流源的长尾对晶体管（T3，T4，T5，T6）。 第一晶体管（T1）具有经由电阻器（R1）连接到地的发射极。 第二晶体管（T2）具有通过另一电阻器（R2）连接到第一晶体管（T1）的发射极的发射极。
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公开(公告)号：EP1195889A2
公开(公告)日：2002-04-10
申请号：EP01307369.7
申请日：2001-08-30
IPC分类号： H03D7/18
摘要： An analogue single conversion tuner comprises a plurality of channels (1, 2, 3) for covering the whole of a desired reception bandwidth. Each tuner comprises an image reject mixer (18) connected to the tuner input (4) by a single tracking filter (16), for example of the single-tuned type.
摘要翻译： 模拟单转换调谐器包括用于覆盖整个所需接收带宽的多个通道（1,2,3）。 每个调谐器包括通过单个跟踪滤波器（16）连接到调谐器输入（4）的图像拒绝混合器（18），例如单调谐型。
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公开(公告)号：EP1195889B1
公开(公告)日：2012-02-01
申请号：EP01307369.7
申请日：2001-08-30
IPC分类号： H03D7/18
摘要： An analogue single conversion tuner comprises a plurality of channels (1, 2, 3) for covering the whole of a desired reception bandwidth. Each tuner comprises an image reject mixer (18) connected to the tuner input (4) by a single tracking filter (16), for example of the single-tuned type.
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公开(公告)号：EP1119100B1
公开(公告)日：2006-09-06
申请号：EP00309862.1
申请日：2000-11-06
发明人： Madni, Arshad
CPC分类号： H03G1/0023
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公开(公告)号：EP1067677B1
公开(公告)日：2006-05-03
申请号：EP00305610.8
申请日：2000-07-03
发明人： Madni, Arshad , Trodd, Lance
CPC分类号： H03F3/195
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公开(公告)号：EP1119100A3
公开(公告)日：2003-10-29
申请号：EP00309862.1
申请日：2000-11-06
发明人： Madni, Arshad
CPC分类号： H03G1/0023
摘要： An AC voltage amplifier arrangement comprising an input stage 1 having an input, an amplifier 3 connected in series shunt feedback mode, and an output, further comprises a variable gain amplification stage 2 having an input coupled to the output of said input stage 1, and an output. The amplifiers 3,5 of the input and variable gain amplification stages 1,2 are arranged to operate in current mode.
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公开(公告)号：EP1292021B1
公开(公告)日：2007-07-04
申请号：EP02102214.0
申请日：2002-08-23
发明人： Madni, Arshad , Lauria, Franco , Cowley, Nicholas, Paul , Trodd, Lance, Rhys , Mudd, Mark, Stephen, John
CPC分类号： H03F3/45089 , H03F2203/45392 , H03F2203/45496 , H03F2203/45612
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公开(公告)号：EP1154567B1
公开(公告)日：2005-12-28
申请号：EP01303999.5
申请日：2001-05-01
发明人： Madni, Arshad
IPC分类号： H03F3/45
CPC分类号： H03F3/45085 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D7/1491 , H03D2200/0025 , H03F3/3432 , H03F2200/294 , H03F2200/372 , H03F2203/45318 , H03F2203/45392 , H03F2203/45508 , H03F2203/45701
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