公开(公告)号：US07057457B2

公开(公告)日：2006-06-06

申请号：US10482651

申请日：2002-06-19

申请人： Robert-Grant Irvine ,  Harald Pretl ,  Claus Stoeger ,  Wolfgang Thomann

发明人： Robert-Grant Irvine ,  Harald Pretl ,  Claus Stoeger ,  Wolfgang Thomann

IPC分类号： H03F3/45

CPC分类号： H03F3/45188 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45386 ,  H03F2203/45394 ,  H03F2203/45396 ,  H03F2203/45616 ,  H03F2203/7236

摘要： A low-noise amplifier circuit is specified which has a switchable gain ratio. For this purpose, a parallel circuit comprising a first and a second current path (3, 4) is provided between a radio-frequency signal input and output (1, 2), with the first current path (3) having a transistor which is connected in a common-base circuit for signal amplification, and the second current path (4) having a transistor which is connected in a common-emitter circuit (7) for signal amplification, and has input impedance matching (25, 27). Owing to the good noise characteristics and the good linearity characteristics, the described low-noise amplifier circuit is suitable for use in radio-frequency receivers in which adaptive pre-amplification is required even before a frequency converter, that is to say at the radio-frequency level, because the input signal has a wide dynamic range, such as that in the case of UMTS.

摘要翻译： 指定了具有可切换增益比的低噪声放大器电路。 为此，在射频信号输入和输出（1,2）之间提供包括第一和第二电流路径（3,4）的并联电路，其中第一电流路径（3）具有晶体管，其是 连接在用于信号放大的公共基极电路中，并且第二电流路径（4）具有连接在用于信号放大的共射极电路（7）中并具有输入阻抗匹配（25,27）的晶体管。 由于具有良好的噪声特性和良好的线性特性，所以所述的低噪声放大器电路适用于即使在频率转换器之前也需要自适应预放大的射频接收机，也就是说， 频率电平，因为输入信号具有宽的动态范围，例如在UMTS的情况下。

公开(公告)号：US20050068106A1

公开(公告)日：2005-03-31

申请号：US10482651

申请日：2002-06-19

申请人： Robert-Grant Irvine

发明人： Robert-Grant Irvine

IPC分类号： H03F1/26 ,  H03F3/19 ,  H03F3/45

CPC分类号： H03F3/45188 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45386 ,  H03F2203/45394 ,  H03F2203/45396 ,  H03F2203/45616 ,  H03F2203/7236

摘要： A low-noise amplifier circuit is specified which has a switchable gain ratio. For this purpose, a parallel circuit comprising a first and a second current path (3, 4) is provided between a radio-frequency signal input and output (1, 2), with the first current path (3) having a transistor which is connected in a common-base circuit for signal amplification, and the second current path (4) having a transistor which is connected in a common-emitter circuit (7) for signal amplification, and has input impedance matching (25, 27). Owing to the good noise characteristics and the good linearity characteristics, the described low-noise amplifier circuit is suitable for use in radio-frequency receivers in which adaptive pre-amplification is required even before a frequency converter, that is to say at the radio-frequency level, because the input signal has a wide dynamic range, such as that in the case of UMTS.

摘要翻译： 指定了具有可切换增益比的低噪声放大器电路。 为此，在射频信号输入和输出（1,2）之间提供包括第一和第二电流路径（3,4）的并联电路，其中第一电流路径（3）具有晶体管，其是 连接在用于信号放大的公共基极电路中，并且第二电流路径（4）具有连接在用于信号放大的共射极电路（7）中并具有输入阻抗匹配（25,27）的晶体管。 由于具有良好的噪声特性和良好的线性特性，所以所述的低噪声放大器电路适用于即使在频率转换器之前也需要自适应预放大的射频接收机，也就是说， 频率电平，因为输入信号具有宽的动态范围，例如在UMTS的情况下。

公开(公告)号：US06531904B1

公开(公告)日：2003-03-11

申请号：US08653306

申请日：1996-05-24

申请人： Werner Veit ,  Josef Fenk ,  Robert-Grant Irvine

发明人： Werner Veit ,  Josef Fenk ,  Robert-Grant Irvine

IPC分类号： H03B1900

CPC分类号： H03H11/265 ,  H03H11/18

摘要： A circuit configuration for generating an output signal orthogonal to an input signal includes a delay device having an input to which an input signal is applied, an output at which an output signal is available, and a control input for controlling a time lag. A multiplier device has inputs being coupled to the input and the output of the delay device and has an output. A device for low-pass filtering is connected between the output of the multiplier device and the control input of the delay device.

摘要翻译： 用于产生与输入信号正交的输出信号的电路配置包括具有输入信号被施加的输入的延迟装置，输出信号可用的输出和用于控制时滞的控制输入。 乘法器装置具有耦合到延迟装置的输入和输出的输入并具有输出。 用于低通滤波的装置连接在乘法器装置的输出端和延迟装置的控制输入端之间。

公开(公告)号：US5598128A

公开(公告)日：1997-01-28

申请号：US435322

申请日：1995-05-05

申请人： Werner Veit ,  Robert-Grant Irvine

发明人： Werner Veit ,  Robert-Grant Irvine

IPC分类号： H03F3/45

CPC分类号： H03F3/45479

摘要： An operational amplifier includes a symmetrical end stage being formed of emitter followers. The end stage has output terminals forming outputs of the operational amplifier and has input terminals. A voltage divider is connected between the output terminals of the end stage and has a tap. A first differential amplifier stage has input terminals forming symmetrical inputs of the operational amplifier and has output terminals each being coupled to a respective one of the input terminals of the end stage. Loads each terminate a respective one of the output terminals of the first differential amplifier stage. Two second parallel-connected differential amplifier stages each have a first input terminal connected to a reference potential, a second input terminal connected to the tap of the voltage divider, and an output terminal each being coupled to a respective one of the loads.

摘要翻译： 运算放大器包括由发射极跟随器形成的对称端级。 终端具有形成运算放大器的输出的输出端子，并具有输入端子。 分压器连接在终端的输出端子之间，并具有水龙头。 第一差分放大器级具有形成运算放大器的对称输入的输入端，并且每个输出端都耦合到端级的相应输入端。 负载各自终止第一差分放大器级的输出端的相应一个。 两个第二并联连接的差分放大器级各自具有连接到参考电位的第一输入端子，连接到分压器的抽头的第二输入端子和各自耦合到相应的一个负载的输出端子。