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    RF power amplifier employing bias circuit topologies for minimization of RF amplifier memory effects
    2.
    发明申请
    RF power amplifier employing bias circuit topologies for minimization of RF amplifier memory effects 有权
    RF功率放大器采用偏置电路拓扑，以最大限度地降低RF放大器的记忆效应

    公开(公告)号：US20030227330A1

    公开(公告)日：2003-12-11

    申请号：US10410457

    申请日：2003-04-08

    发明人： Ahmad Khanifar ,  Nikolai Maslennikov ,  Gareth Spiller

    IPC分类号： H03F003/191

    CPC分类号： H03F1/3241 ,  H03F1/0261 ,  H03F1/30 ,  H03F1/3235 ,  H03F3/60 ,  H03F2200/12 ,  H03F2200/15 ,  H03F2200/451 ,  H03F2201/3209 ,  H03F2201/3224

    摘要： An RF power amplifier having reduced memory effects is disclosed. This is achieved by a novel design of the DC supply feed network to achieve low impedance across video frequencies, whilst maintaining the correct RF output matching. One or more transmission zeros are provided in the bias circuit transfer function, which are positioned in the video bandwidth so as to provide low and relatively constant impedance across the video bandwidth. Also, a parallel DC feed line may be employed to reduce impedance across the video bandwidth. The reduction in memory effects allows improved performance of predistortion linearization techniques and an implementation in a feed forward amplifier employing predistortion linearization is also disclosed.

    摘要翻译： 公开了具有减小的记忆效应的RF功率放大器。 这是通过直流供电馈电网络的新颖设计实现的，以实现视频频率的低阻抗，同时保持正确的RF输出匹配。 在偏置电路传递函数中提供一个或多个传输零点，偏置电路传递函数位于视频带宽中，以便在视频带宽上提供低且相对恒定的阻抗。 此外，可以采用并联DC馈线来减少跨越视频带宽的阻抗。 存储器效应的降低允许改善预失真线性化技术的性能，并且还公开了采用预失真线性化的前馈放大器中的实现。

    Linear pre-amplifier for radio-frequency power amplifier
    4.
    发明申请
    Linear pre-amplifier for radio-frequency power amplifier 有权
    用于射频功率放大器的线性前置放大器

    公开(公告)号：US20030107441A1

    公开(公告)日：2003-06-12

    申请号：US10111122

    申请日：2002-07-22

    发明人： Jean-Charles Grasset ,  Christophe Pinatel

    IPC分类号： H03F003/191

    CPC分类号： H03F3/45085 ,  H03D7/1433 ,  H03D2200/0088 ,  H03F1/34 ,  H03F3/191 ,  H03F2203/45464 ,  H03F2203/45638

    摘要： The invention concerns an amplifier comprising an input circuit (26) tuned on the frequency to be amplified and receiving in input the signal to be amplified, a first transistor (Q2) connected in common base, whereof the transmitter is coupled to an input circuit and whereof the collector supplies the amplifier output signal, and a feedback circuit returning on the base of said transistor a fraction of the output voltage. The feedback circuit comprises a capacitive bridge (Ca, Cb) and a second transistor (Q3). The input circuit can form part of a first stage of the amplifier or of a mixer.

    摘要翻译： 本发明涉及一种放大器，其包括在待放大的频率上被调谐的输入电路（26），并在输入中接收要被放大的信号;第一晶体管（Q2），其连接在公共基极上，所述发射器耦合到输入电路， 其中集电极提供放大器输出信号，反馈电路在所述晶体管的基极上返回输出电压的一部分。 反馈电路包括电容电桥（Ca，Cb）和第二晶体管（Q3）。 输入电路可以形成放大器或混频器的第一级的一部分。

    HIGH-FREQUENCY AMPLIFIER CIRCUIT HAVING A DIRECTLY-CONNECTED BIAS CIRCUIT
    5.
    发明申请
    HIGH-FREQUENCY AMPLIFIER CIRCUIT HAVING A DIRECTLY-CONNECTED BIAS CIRCUIT 失效
    具有直接连接的偏置电路的高频放大器电路

    公开(公告)号：US20020125954A1

    公开(公告)日：2002-09-12

    申请号：US09801623

    申请日：2001-03-08

    申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V.

    发明人： Sifen Luo ,  Tirdad Sowlati

    IPC分类号： H03F003/191

    CPC分类号： H03F1/302

    摘要： A high-frequency amplifier circuit includes an amplifying transistor and a bias circuit directly connected to said amplifying transistor. The bias circuit includes a bias transistor having a control terminal and an inductor coupled to the control terminal, and the bias transistor also has an output terminal directly connected to the amplifying transistor. A resistor is connected in series with the inductor, and the series-connected components are connected in the circuit between the control terminal and a power supply terminal. By providing an inductor in the amplifier in this manner, loading effects on the amplifying transistor at high frequencies is substantially reduced.

    摘要翻译： 高频放大器电路包括放大晶体管和与所述放大晶体管直接连接的偏置电路。 偏置电路包括具有控制端子和耦合到控制端子的电感器的偏置晶体管，偏置晶体管还具有直接连接到放大晶体管的输出端子。 电感器与电感器串联连接，串联连接的元件连接在控制端子和电源端子之间的电路中。 通过以这种方式在放大器中提供电感器，大幅减少了在高频下对放大晶体管的负载效应。

    Voltage tunable active inductorless filter
    6.
    发明申请
    Voltage tunable active inductorless filter 失效

    公开(公告)号：US20020050863A1

    公开(公告)日：2002-05-02

    申请号：US10000696

    申请日：2001-11-14

    发明人： Leonard Forbes

    IPC分类号： H03F003/191

    CPC分类号： H04B1/18 ,  H03H11/04 ,  H03H11/1213 ,  H04B1/48

    摘要： A monolithic active frequency selection circuit includes an input presenting a frequency-dependent impedance and a first gain block configured to provide less than unity voltage gain, a high input impedance and a low output impedance. An output of the first amplifier is coupled to the frequency selection circuit input. The frequency selection circuit includes a first phase shifter that, in one aspect, is formed by a first capacitor coupled between the first port and a reference voltage. The frequency selection circuit also includes a second amplifier configured to provide greater than unity voltage gain. The second amplifier has an input coupled to the output of the first amplifier and an output coupled to the input of the first amplifier. The frequency selection circuit further includes a second phase shifter, which may be formed from a capacitor coupled between the output of the second amplifier and a reference voltage. The first and second amplifiers and the first and second phase shifters are coupled in a loop such that the frequency dependence of an impedance presented at the output of the first amplifier emulates the impedance of a parallel RLC tank circuit, providing a Q on the order of ten at a center frequency nullo of several hundred megahertz. The output of the second amplifier may be used to provide a high Q, tuned transimpedance amplification function relative to the input.

    Semiconductor circuit with a stabilized gain slope
    7.
    发明申请
    Semiconductor circuit with a stabilized gain slope 失效
    具有稳定增益斜率的半导体电路

    公开(公告)号：US20020005761A1

    公开(公告)日：2002-01-17

    申请号：US09933751

    申请日：2001-08-22

    申请人： NEC CORPORATION

    发明人： Yuji Kakuta ,  Yoshiaki Fukasawa ,  Yuichi Taguchi

    IPC分类号： H03F003/191

    CPC分类号： H03F1/086 ,  H03F3/191

    摘要： Realizing a stabilized gain slope without increasing circuit scale or entailing extra time or care for correcting impedance. A resonant circuit that is made up of a capacitor and an inductor is provided in an output stage outside a feedback loop for realizing peaking at a particular frequency and for realizing a gain slope having a desired slope of, for example, 1 dB or more.

    摘要翻译： 实现稳定的增益斜率，而不增加电路规模或需要额外的时间或小心纠正阻抗。 由电容器和电感器构成的谐振电路设置在反馈回路外部的输出级，用于实现特定频率的峰值，并实现具有例如1dB或更大的期望斜率的增益斜率。

    Two stage low noise amplifier
    8.
    发明申请
    Two stage low noise amplifier 有权
    两级低噪声放大器

    公开(公告)号：US20010035792A1

    公开(公告)日：2001-11-01

    申请号：US09770335

    申请日：2001-01-26

    发明人： Ranjit Gharpurey

    IPC分类号： H03F003/45 ,  H03F003/191

    CPC分类号： H03F3/193 ,  H03F3/45183 ,  H03F3/72 ,  H03F2200/372 ,  H03F2203/45704

    摘要： A two stage low noise amplifier (10) includes a first stage (12) and a second stage (14). The first stage (12) receives an input signal (VIN), performs single to differential conversion on the input signal (VIN), and generates an input differential signal (VA and VB) therefrom. A bias level of the input differential signal (VA and VB) may be adjusted to an optimal bias point of the second stage (14). The first stage (12) provides the input differential signal (VA and VB) to the second stage (14) without any loss in amplifier gain. The second stage (14) performs image rejection on the input differential signal (VA and VB) and generates an output differential signal (Vnull and Vnull) therefrom. The first stage (12) and the second stage (14) include a tuning circuit to adjust a center operating frequency of the amplifier (10). The first stage (12) and the second stage (14) receive control signals from a control bus (16) in order to adjust the center operating frequency.

    摘要翻译： 两级低噪声放大器（10）包括第一级（12）和第二级（14）。 第一级（12）接收输入信号（VIN），对输入信号（VIN）执行单差分转换，并从其产生输入差分信号（VA和VB）。 可以将输入差分信号（VA和VB）的偏置电平调整到第二级（14）的最佳偏置点。 第一级（12）向第二级（14）提供输入差分信号（VA和VB），而放大器增益没有任何损耗。 第二级（14）对输入差分信号（VA和VB）进行图像抑制，并从其产生输出差分信号（V +和V-）。 第一级（12）和第二级（14）包括调整放大器（10）的中心工作频率的调谐电路。 第一级（12）和第二级（14）接收来自控制总线（16）的控制信号，以调整中心工作频率。

    Power amplifier
    9.
    发明申请
    Power amplifier 失效
    功率放大器

    公开(公告)号：US20040212437A1

    公开(公告)日：2004-10-28

    申请号：US10830030

    申请日：2004-04-23

    发明人： Hong Teuk Kim

    IPC分类号： H03F003/191

    CPC分类号： H03F1/0288 ,  H03F1/0277 ,  H03F3/191 ,  H03F3/211 ,  H03F3/72

    摘要： A power amplifier for enhancing output efficiency is disclosed. The power amplifier includes a first amplifier connected to a first power, a second amplifier connected to a second power, a common input impedance matching unit impedance matching inputted signals and outputting the inputted signals to the first amplifier and the second amplifier, a common output impedance matching unit impedance matching and outputting the signals amplified from the first amplifier and the second amplifier, an output impedance matching unit electrically connected between the first amplifier and the common output impedance matching unit, and modifying an output voltage value of the first amplifier to an output voltage value of the second amplifier, and an input impedance matching unit electrically connected between the common input impedance matching unit and the first amplifier, and compensating a phase shift occurring during the voltage modification of the output impedance matching unit.

    摘要翻译： 公开了一种用于提高输出效率的功率放大器。 功率放大器包括连接到第一功率的第一放大器，连接到第二功率的第二放大器，匹配输入信号的公共输入阻抗匹配单元阻抗，并将输入的信号输出到第一放大器和第二放大器，公共输出阻抗 匹配单元阻抗匹配并输出从第一放大器和第二放大器放大的信号，电连接在第一放大器和公共输出阻抗匹配单元之间的输出阻抗匹配单元，以及将第一放大器的输出电压值修改为输出 第二放大器的电压值，以及电连接在公共输入阻抗匹配单元和第一放大器之间的输入阻抗匹配单元，并补偿在输出阻抗匹配单元的电压修改期间发生的相移。

    RF POWER AMPLIFIER WITH LOW INTERMODULATION DISTORTION AND REDUCED MEMORY EFFECT
    10.
    发明申请
    RF POWER AMPLIFIER WITH LOW INTERMODULATION DISTORTION AND REDUCED MEMORY EFFECT 失效

    公开(公告)号：US20040178853A1

    公开(公告)日：2004-09-16

    申请号：US10385783

    申请日：2003-03-11

    发明人： Ilan Saul Barak

    IPC分类号： H03F003/191

    CPC分类号： H03F1/301 ,  H03F3/193

    摘要： A radio-frequency (RF) power amplifier includes an active device, having an input port, which is coupled to receive an RF input signal having a center frequency f0 and a single-sided bandwidth BW, and an output port, which is characterized by an output capacitance C1 and is coupled to output an amplified RF signal, responsive to the input signal, with a peak output power Pout. A distortion suppression circuit is coupled between the output port and a ground, and includes a transmission line having a characteristic impedance Z0 that is selected so as to substantially satisfy a condition that 1 Z 0 null f 0 null null null null BW null 1 P out 11.3 + 4 null null null null null null null BW null C 1 .