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    • 42. 发明授权
    • Amplifier with matched input and output
    • 具有匹配输入和输出的放大器
    • US3675145A
    • 1972-07-04
    • US3675145D
    • 1971-03-22
    • BELL TELEPHONE LABOR INC
    • BEURRIER HENRY RICHARD
    • H01P1/213H03F1/32H03F1/38H03F1/56H03F3/68H03H11/36H04B3/00H04B3/36
    • H01P1/213H03F1/3223H03F1/38H03F1/565H03F3/211H03F3/68H03F2200/198H03F2200/537H03H11/36H04B3/00H04B3/36
    • This application describes an arrangement for matching the output impedance of an amplifier to its load. The amplifier comprises two active stages having mutually inverse output impedances whose respective magnitudes are, preferably, at least an order of magnitude greater than and at least an order of magnitude less than the impedance of the external load circuit to which the amplifier is connected. The lower output impedance stage is connected to a first load impedance through one winding of a two-winding transformer. The higher output impedance stage is connected to ground through the other transformer winding. A second, impedance-matching load is connected in shunt with either one of the two transformer windings. By controlling the relative amplitude and phase of the signals derived from the two stages, the signal current can be coupled to either one or the other of the two load impedances, or to both. Arrangements for increasing the amplifier gain and obtaining a match at the amplifier input are also described.
    • 该应用描述了用于将放大器的输出阻抗与其负载进行匹配的布置。 放大器包括具有相互反向输出阻抗的两个有源级,其相应的幅度优选地比放大器连接到的外部负载电路的阻抗大至少一个数量级。 较低的输出阻抗级通过双绕组变压器的一个绕组连接到第一个负载阻抗。 较高的输出阻抗级通过另一个变压器绕组连接到地。 第二个阻抗匹配负载与两个变压器绕组中的任一个并联连接。 通过控制从两级导出的信号的相对幅度和相位,信号电流可以耦合到两个负载阻抗中的一个或另一个,或两者。
    • 46. 发明申请
    • ACTIVE QUASI CIRCULATOR
    • 主动准循环器
    • US20160156085A1
    • 2016-06-02
    • US14555623
    • 2014-11-27
    • Infineon Technologies AG
    • Christoph WagnerMatthias Porranzl
    • H03H11/38H03F3/45
    • H03H11/34H01P1/18H01P1/383H03F1/565H03F3/45076H03F3/4508H03F3/60H03F2200/451H03F2203/45034H03H11/36
    • An RF quasi circulator circuit is described herein. In accordance with one example of the disclosure the circuit includes a receive port, a transmit port and an antenna port as well as a differential amplifier stage having a first input, a second input and an output that is coupled to the receive port. The circuit further includes a first phase shifting element and a second phase shifting element. The first phase shifting element is coupled between the transmit port and the first input of the differential amplifier and the second phase shifting element is coupled between the transmit port and the second input of the differential amplifier. A tunable impedance is coupled to the differential amplifier, and the antenna port is coupled to the first input of the differential amplifier. The tunable impedance is controlled to tune the damping in a signal path from the transmit port to the receive port.
    • 本文描述了RF准循环器电路。 根据本公开的一个示例,电路包括接收端口,发送端口和天线端口以及具有耦合到接收端口的第一输入,第二输入和输出的差分放大器级。 电路还包括第一相移元件和第二相移元件。 第一相移元件耦合在差分放大器的发送端口和第一输入端之间,第二移相元件耦合在差分放大器的发送端口和第二输入端之间。 可调阻抗耦合到差分放大器,并且天线端口耦合到差分放大器的第一输入端。 可调阻抗被控制以调节从发射端口到接收端口的信号路径中的阻尼。
    • 49. 发明授权
    • Reconfigurable high-order integrated circuit filters
    • 可重构高阶集成电路滤波器
    • US08872580B2
    • 2014-10-28
    • US13550255
    • 2012-07-16
    • Hussain Alzaher
    • Hussain Alzaher
    • H03K17/16
    • H03H11/0455H03H11/0422H03H11/36
    • Voltage and current mode reconfigurable nth-order filters (RNOFs) fabricated in a 0.18 μm CMOS process are disclosed. The RNOFs utilize an inverse-follow-the-leader-feedback (IFLF) signal path with summed outputs, resulting in a follow-the-leader-feedback-summed-outputs (FLF-SO) filter topology. The FLF-SO filter uses multi-output current amplifiers (CAs). Inverse-follow-the-leader-feedback-summed-outputs (IFLF-SO) and inverse-follow-the-leader-feedback-distributed-outputs (IFLF-DI) structures are realized by employing 3n+4 transconductance amplifiers (TCAs) for voltage mode processing and two TCAs for current mode signals. A plurality of programmable current division networks (CDNs) tune a digitally controlled current follower (DCCF). A multi-output Digitally Controlled Current Amplifier (MDCCA) controls gain by providing independent filter coefficient control. Forward path output gains are set to unity. Alternatively, a multi-output digitally controlled CCII block (MDCCCII) uses CCII in the first stage. Such filters provide independent tuning of both numerator as well as denominator coefficients and are reconfigurable without the need of switches due to CDNs setting undesired output current to zero.
    • 公开了以0.18μmCMOS工艺制造的电压和电流模式可重新配置的n阶滤波器(RNOF)。 RNOF利用具有相加输出的反向跟随前导反馈(IFLF)信号路径,导致跟随前导 - 反馈求和输出(FLF-SO)滤波器拓扑。 FLF-SO滤波器使用多输出电流放大器(CA)。 通过采用3n + 4跨导放大器(TCA)实现反向跟随 - 前导反馈求和输出(IFLF-SO)和反向跟随 - 前导反馈分布式输出(IFLF-DI) 用于电压模式处理和两个TCA用于电流模式信号。 多个可编程分频网络(CDN)调谐数字控制的电流跟随器(DCCF)。 多输出数字控制电流放大器(MDCCA)通过提供独立的滤波器系数控制来控制增益。 前向路径输出增益设置为1。 或者,多输出数字控制CCII块(MDCCCII)在第一级使用CCII。 这样的滤波器提供分子和分母系数的独立调谐,并且由于CDN将不需要的输出电流设置为零而可重新配置而不需要开关。
    • 50. 发明授权
    • Asymmetric power divider
    • 不对称功率分配器
    • US08344824B2
    • 2013-01-01
    • US12768432
    • 2010-04-27
    • Yu Sin KimSong Cheol HongSang Hyun BaekYoun Suk Kim
    • Yu Sin KimSong Cheol HongSang Hyun BaekYoun Suk Kim
    • H03H7/38
    • H03H11/36H03F1/0288H03H7/18H03H7/38
    • Disclosed herein is an asymmetric power divider. The asymmetric power divider includes a power dividing unit, a first matching network, and a second matching network. The power dividing unit supplies different amounts of power to a carrier amplifier and a peaking amplifier, which are connected in parallel. The first matching network is connected between the power dividing unit and the carrier amplifier so as to perform impedance matching between the power dividing unit and the carrier amplifier. The second matching network is connected between the power dividing unit and the peaking amplifier so as to perform impedance matching between the power dividing unit and the peaking amplifier.
    • 本文公开了一种不对称功率分配器。 不对称功率分配器包括功率分配单元,第一匹配网络和第二匹配网络。 功率分配单元向并联的载波放大器和峰化放大器提供不同的功率量。 第一匹配网络连接在功率分配单元和载波放大器之间,以便在功率分配单元和载波放大器之间执行阻抗匹配。 第二匹配网络连接在功率分配单元和峰化放大器之间,以便在功率分配单元和峰化放大器之间执行阻抗匹配。