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公开(公告)号：US06876843B2
公开(公告)日：2005-04-05
申请号：US10056155
申请日：2002-01-24
申请人： Arshad Madni , Mark Mudd
发明人： Arshad Madni , Mark Mudd
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 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 provided with tail current sources formed by transistors whose bases are connected to a bias voltage source. The first transistor has an emitter connected via a resistor to ground. The second transistor has an emitter connected via another resistor to the emitter of the first transistor.
摘要翻译： 通过连接反相中的第一和第二跨导放大器来提供改进的互调性能的射频放大器，使得三阶互调产物相互抵消，但增益的减小相对较小。 跨导级包括提供有由其基极连接到偏置电压源的晶体管形成的尾电流源的长尾对晶体管。 第一晶体管具有经由电阻器接地的发射极。 第二晶体管具有经由另一个电阻器连接到第一晶体管的发射极的发射极。
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公开(公告)号：US06407632B1
公开(公告)日：2002-06-18
申请号：US09611720
申请日：2000-07-05
申请人： Arshad Madni , Lance R Trodd
发明人： Arshad Madni , Lance R Trodd
IPC分类号： H03F136
CPC分类号： H03F3/195
摘要： A radio frequency amplifier comprises an input amplifier provided with a shunt feedback path for determining the input impedance. A first transconductance amplifier forms part of a series feedback arrangement with a resistor around the amplifier so as to boost the effective value of the resistor. An identical transconductance amplifier is connected to the output of the input amplifier and its output forms the output of the radio frequency amplifier.
摘要翻译： 射频放大器包括具有用于确定输入阻抗的分流反馈路径的输入放大器。 第一跨导放大器与放大器周围的电阻器形成串联反馈装置的一部分，以提高电阻器的有效值。 相同的跨导放大器连接到输入放大器的输出，其输出形成射频放大器的输出。
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公开(公告)号：US06304142B1
公开(公告)日：2001-10-16
申请号：US09590330
申请日：2000-06-08
申请人： Arshad Madni
发明人： Arshad Madni
IPC分类号： H03F345
CPC分类号： H03G1/0023
摘要： A variable transconductance amplifier comprises transistors and whose emitters are connected via resistors and to a constant current source to form a differential or long tail pair. A feedback amplifier whose transconductance is controllable has inputs connected to the collectors of the transistors and outputs connected to the emitters thereof. The feedback amplifier thus supplies a differential current to the emitters of the transistors which corresponds to the product of the differential output signal of the transistors and the variable transconductance of the feedback amplifier.
摘要翻译： 可变跨导放大器包括晶体管，其发射极通过电阻器连接到恒流源以形成差分或长尾对。 跨导可控的反馈放大器具有连接到晶体管的集电极和连接到其发射极的输出的输入。 因此，反馈放大器向晶体管的发射极提供差分电流，其对应于晶体管的差分输出信号和反馈放大器的可变跨导的乘积。
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公开(公告)号：US06480066B1
公开(公告)日：2002-11-12
申请号：US09705499
申请日：2000-11-02
申请人： Arshad Madni
发明人： Arshad Madni
IPC分类号： H03F345
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.
摘要翻译： 一种AC电压放大器装置，包括具有输入的输入级1，串联分流反馈模式连接的放大器3和输出，还包括具有耦合到所述输入级1的输出的输入的可变增益放大级2，以及 一个输出。 输入和可变增益放大级1,2的放大器3,5布置成在当前模式下工作。
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公开(公告)号：US5684433A
公开(公告)日：1997-11-04
申请号：US566859
申请日：1995-12-04
CPC分类号： H03F1/3211 , H03F2203/45176 , H03F2203/45466 , H03F2203/45471
摘要： In an amplifier circuit arrangement in which series resistive feedback is utilized in the main amplifier to minimize distortion, and a feedback amplifier is provided in a path from the output of the arrangement to the series feedback path effectively to boost the value of the feedback resistor, a further amplifier is arranged to provide positive feedback to the resistive load circuit of the main amplifier effectively to boost the value of the resistive load.
摘要翻译： 在主放大器中使用串联电阻反馈以最小化失真的放大器电路装置中，并且反馈放大器被提供在从布置的输出到串联反馈路径的路径中以有效地提高反馈电阻的值， 另外一个放大器可以有效地向主放大器的电阻负载电路提供正反馈，以提高电阻负载的值。
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公开(公告)号：US06995610B2
公开(公告)日：2006-02-07
申请号：US10439126
申请日：2003-05-15
申请人： Arshad Madni
发明人： Arshad Madni
IPC分类号： H03F1/36
CPC分类号： H03F3/195 , H03F3/45085 , H03F2200/294 , H03F2200/372
摘要： An LNA for use as an input stage of a radio frequency tuner comprises an inverting amplifier stage and a transconductance stage. The amplifier stage has an input connected via an input resistance to an input of the amplifier and via a feedback resistance to an output of the amplifier stage. The transconductance stage passes a current through the input resistance which is substantially proportional to the output voltage of the amplifier stage.
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公开(公告)号：US06747512B2
公开(公告)日：2004-06-08
申请号：US10383712
申请日：2003-03-07
申请人： Arshad Madni
发明人： Arshad Madni
IPC分类号： H03F345
CPC分类号： H03F3/45098 , H03F1/3211 , H03F2200/294 , H03F2200/372 , H03F2203/45318 , H03F2203/45454
摘要： An amplifier which is suitable for use as a radio frequency low noise amplifier comprises first, second and third transconductance stages. The amplifier input is connected to the inputs of the first and third stages, whose outputs are connected together in anti-phase so as to provide feedforward error correction. The second stage has inputs connected to the outputs of the first stage and outputs connected across a resistor to current feedback inputs of the first stage so as to provide negative feedback. The first and third stages provide feedforward distortion cancelling so as to improve the linearity of the amplifier. The negative feedback provided by the second stage further improves the linearity without substantially increasing the noise figure of the amplifier.
摘要翻译： 适用于射频低噪声放大器的放大器包括第一，第二和第三跨导级。 放大器输入连接到第一和第三级的输入端，其输出反相连接在一起，以提供前馈纠错。 第二级具有连接到第一级的输出的输入端，并且将输出端连接到电阻器到第一级的电流反馈输入端，从而提供负反馈。 第一和第三级提供前馈失真消除，以便改善放大器的线性度。 由第二级提供的负反馈进一步提高了线性度，而基本上不增加放大器的噪声系数。
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公开(公告)号：US06727746B2
公开(公告)日：2004-04-27
申请号：US10225790
申请日：2002-08-22
申请人： Arshad Madni , Franco Lauria , Mark Stephen John Mudd , Lance Rhys Trodd , Nicholas Paul Cowley
发明人： Arshad Madni , Franco Lauria , Mark Stephen John Mudd , Lance Rhys Trodd , Nicholas Paul Cowley
IPC分类号： H03F345
CPC分类号： H03F3/45089 , H03F2203/45392 , H03F2203/45496 , H03F2203/45612
摘要： A radio frequency amplifier including a long tail pair of transistors provided with a tail current source. The bases of the transistors are driven by emitter follower transistor provided with collector load resistors. Feedback capacitors ensure stability and feedback resistors bias the amplifier without degrading noise performance. The amplifier may be driven unbalanced while retaining good second harmonic distortion performance.
摘要翻译： 一种射频放大器，包括设置有尾电流源的长尾对晶体管。 晶体管的基极由配有集电极负载电阻的射极跟随器晶体管驱动。 反馈电容器确保稳定性和反馈电阻器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：US07006162B2
公开(公告)日：2006-02-28
申请号：US09971468
申请日：2001-10-05
申请人： Nicholas Paul Cowley , Arshad Madni
发明人： Nicholas Paul Cowley , Arshad Madni
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信道（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），例如单调谐类型。
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10.发明授权公开(公告)号：US06708316B2
公开(公告)日：2004-03-16
申请号：US09790062
申请日：2001-02-21
申请人： Arshad Madni , Keith Strickland , Lance Trodd , Chris Powell
发明人： Arshad Madni , Keith Strickland , Lance Trodd , Chris Powell
IPC分类号： G06F1750
CPC分类号： G06F17/5063
摘要： A system and method are provided for designing and manufacturing a semiconductor device, such as part of an integrated circuit. A template comprising a basic circuit diagram of a discrete circuit block and corresponding design equations are selected from a library. Desired performance parameters are selected and the value of one or more components of the circuit block are determined to allow the block to achieve the desired performance parameters.
摘要翻译： 提供了用于设计和制造诸如集成电路的一部分的半导体器件的系统和方法。 从库中选择包括离散电路块的基本电路图和对应的设计方程的模板。 选择期望的性能参数，并且确定电路块的一个或多个组件的值以允许块实现期望的性能参数。
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