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    • 4. 发明授权
    • Provision of local oscillator signals
    • 提供本地振荡器信号
    • US06954109B2
    • 2005-10-11
    • US10643599
    • 2003-08-18
    • Jarmo HeinonenMarkus PetterssonSami Vilhonen
    • Jarmo HeinonenMarkus PetterssonSami Vilhonen
    • H03L7/22H04B1/40H03L7/07H04B1/00
    • H04B1/406H03L7/22
    • The invention relates to a phase-locked loop structure providing local oscillator signals. In order to enable an improved supply of local oscillator signals, the phase-locked loop structure comprises a first phase-locked loop including a first voltage controlled oscillator and a second phase-locked loop including a second voltage controlled oscillator. A first local oscillator output provides a first local oscillator signal, wherein a signal output by the first voltage controlled oscillator is forwarded to the first local oscillator output. A second local oscillator output provides a second local oscillator signal. A selection component forwards a signal output by the first voltage controlled oscillator or a signal output by the second voltage controlled oscillator to the second local oscillator output. The invention relates equally to a corresponding communication unit and to a corresponding method.
    • 本发明涉及提供本地振荡器信号的锁相环结构。 为了能够改善本地振荡器信号的供应,锁相环结构包括包括第一压控振荡器和包括第二压控振荡器的第二锁相环的第一锁相环。 第一本地振荡器输出提供第一本地振荡器信号,其中由第一压控振荡器输出的信号被转发到第一本地振荡器输出。 第二本地振荡器输出提供第二本机振荡器信号。 选择部件将由第一压控振荡器输出的信号或由第二压控振荡器输出的信号转发到第二本机振荡器输出。 本发明同样涉及对应的通信单元和相应的方法。
    • 5. 发明授权
    • Amplifier with on-chip filter
    • 具有片上滤波器的放大器
    • US08503963B2
    • 2013-08-06
    • US13173973
    • 2011-06-30
    • Pete SivonenJonne RiekkiJouni KaukovuoriSami VilhonenJarkko Jussila
    • Pete SivonenJonne RiekkiJouni KaukovuoriSami VilhonenJarkko Jussila
    • H04B1/10
    • H03H19/008
    • An integrated circuit for a radio receiver comprising a radio-frequency amplifier and a radio-frequency filter is described. The amplifier receives radio-frequency signals from an antenna, the filter is connected to the amplifier output, and the output of the filter is provided to a processing stage of the receiver. The amplifier comprises an amplifying stage controlled by a radio-frequency input signal and a signal fed back from the filter. The amplifier input impedance is substantially matched to the antenna impedance at a frequency band of interest. The signal fed back from the filter providing attenuation of signals outside the frequency band of interest at the amplifier input. The filter comprises one or more filter components. A filter component comprises a first input and a second input for receiving the amplifier output, a first switch arranged to selectively connect the first input to a first impedance, a second switch arranged to selectively connect the first input to a second impedance, a third switch arranged to selectively connect the second input to the first impedance, and a fourth switch arranged to selectively connect the second input to the second impedance. The first and fourth switches are controlled by a first oscillator signal and the second and third switches are controlled by a second oscillator signal that is 180° out of phase with the first oscillator signal.
    • 描述了一种用于包括射频放大器和射频滤波器的无线电接收机的集成电路。 放大器从天线接收射频信号,滤波器连接到放大器输出,滤波器的输出提供给接收器的处理级。 放大器包括由射频输入信号控制的放大级和从滤波器反馈的信号。 放大器输入阻抗基本上与感兴趣的频带处的天线阻抗匹配。 从滤波器反馈的信号在放大器输入端提供感兴趣频带之外的信号衰减。 过滤器包括一个或多个过滤器部件。 滤波器部件包括用于接收放大器输出的第一输入端和第二输入端,布置成选择性地将第一输入端连接到第一阻抗的第一开关,布置成有选择地将第一输入端连接到第二阻抗的第二开关,第三开关 布置成选择性地将第二输入端连接到第一阻抗,以及第四开关,被布置为选择性地将第二输入端连接到第二阻抗。 第一和第四开关由第一振荡器信号控制,第二和第三开关由与第一振荡器信号相差180°的第二振荡器信号控制。
    • 10. 发明申请
    • High Output Power Digital TX
    • 高输出功率数字TX
    • US20120314795A1
    • 2012-12-13
    • US13156751
    • 2011-06-09
    • Sami Vilhonen
    • Sami Vilhonen
    • H04L27/00
    • H03F3/45179H03F3/2175H03F3/245H03F2200/336H03F2200/537H03F2200/541H03M1/804H04B2001/0491
    • The disclosed apparatus and corresponding method uses amplifiers and a differential combiner to control the output power of a digital-to-analog upconverter and to isolate In-phase and Quadrature branches of the upconverter. First and second upconverters convert In-phase and Quadrature portions of a baseband digital value to respective first/second In-phase (Ip/In) and first/second Quadrature (Qp/Qn) analog components at RF. First and second amplifiers respectively amplify Ip, In and Qp, Qn to respectively generate amplified Ip, In and Qp, Qn signals. The first and second amplifiers each operate at a 50% duty cycle and in an interleaved fashion such that only one amplifier is active to generate an output at any time, and such that the amplified signals are output in an interleaved fashion. A differential combiner combines the amplified signals to generate the RF analog signal representative of the baseband digital value.
    • 所公开的装置和相应的方法使用放大器和差分组合器来控制数模转换器的输出功率并隔离上变频器的同相和正交分支。 第一和第二上变频器将基带数字值的同相和正交部分转换为RF处的相应的第一/第二同相(Ip / In)和第一/第二正交(Qp / Qn)模拟分量。 第一和第二放大器分别放大Ip,In和Qp,Qn分别产生放大的Ip,In和Qp,Qn信号。 第一和第二放大器各自以50%占空比和交错方式工作,使得只有一个放大器有效以在任何时间产生输出,并且使得放大的信号以交错方式输出。 差分组合器组合放大的信号以产生表示基带数字值的RF模拟信号。