公开(公告)号：EP2137828A1

公开(公告)日：2009-12-30

申请号：EP08736843.7

申请日：2008-04-16

申请人： Nokia Corporation

发明人： SIVONEN, Pete ,  VILANDER, Ari

IPC分类号： H04B1/30 ,  H04B1/06 ,  H04L23/00

CPC分类号： H03F3/45179 ,  H03F3/195 ,  H03F3/4508 ,  H03F2200/294 ,  H03F2200/456 ,  H03F2203/45306 ,  H03F2203/45352 ,  H03F2203/45364 ,  H03F2203/45554

摘要： A transconductor input circuit for a downconverting quadrature mixer stage of a direct-conversion receiver comprises a parr of common-gate input transistors whose source electrodes are coupled to a differential radio frequency (RF) input signal outputted from an interstage RF filter. The transconductor circuit further comprises a pair of equally sized biasing transistors for biasing the pair of common-gate input transistors. Source electrodes of the biasing transistors are coupled to the source electrodes of the transistors to sense the differential radio frequency input signal for canceling intermodulation distortion.

公开(公告)号：EP1894297A2

公开(公告)日：2008-03-05

申请号：EP06744811.8

申请日：2006-06-02

申请人： Nokia Corporation

发明人： VILANDER, Ari

IPC分类号： H03H9/02 ,  H03H9/17 ,  H03H9/56 ,  H03H9/58

CPC分类号： H03H9/60 ,  H03H9/02125 ,  H03H9/175 ,  H03H9/566 ,  H03H9/589

摘要： The present invention relates to a resonator structure, such as a film bulk acoustic wave (FBAW) resonator structure, which is modified to approximate a parasitic in-put characteristic to a parasitic output characteristic and thus enable use of the resonator structure in a differential topology. Thereby, crystal-based resonator structures can be replaced by the proposed differential resonator structure, which enables higher integration, reduced costs and higher frequencies. A crystal based oscillator cannot handle frequencies above 40MHz in fundamental mode.

摘要翻译： 本发明涉及一种诸如薄膜体声波（FBAW）谐振器结构之类的谐振器结构，该谐振器结构被修改成将寄生输入特性逼近寄生输出特性，从而能够在差分拓扑中使用该谐振器结构 。 因此，基于晶体的谐振器结构可以被所提出的差分谐振器结构所取代，其实现了更高的集成度，降低的成本和更高的频率。 在基本模式下，基于晶振的振荡器无法处理40MHz以上的频率。

公开(公告)号：EP2011227A1

公开(公告)日：2009-01-07

申请号：EP07730701.5

申请日：2007-04-23

申请人： Nokia Corporation

发明人： MAUNUKSELA, Jaako ,  SVÄRD, Mikael ,  VILANDER, Ari

IPC分类号： H03C3/00 ,  H03K7/04 ,  H03K7/08

CPC分类号： H03C3/40

摘要： A modulator (610), comprising an input unit configured to receive a modulating signal, a control unit configured to provide a control signal on the basis of the modulating signal, an oscillating unit (606) configured to provide a plurality of instances of at least two phase components of a carrier frequency signal, a phase selector (622) configured to select, on the basis of the control signal, a combination of the phase component instances so that an output signal representing the information contents of the modulating signal is obtained, and a combiner (624) configured to combine the selected phase component instances to form a modulated output signal.

公开(公告)号：EP2005601A1

公开(公告)日：2008-12-24

申请号：EP07712624.1

申请日：2007-03-16

申请人： Nokia Corporation

发明人： ALANEN, Marko, J. ,  VILHONEN, Sami ,  VILANDER, Ari ,  HEIKKINEN, Jari

IPC分类号： H04B1/04 ,  H04B1/40 ,  H03H19/00

CPC分类号： H04B1/0475 ,  H03H19/008

摘要： A filtering method, a transceiver and a transmitter are provided. The transmitter comprises a power amplifier amplifying an RF signal and having multiple stages, and a local oscillator, the power amplifier comprising between at least two stages of the power amplifier an impedance circuitry for forming an impedance at a frequency related to the frequency of the local oscillator, and a switch for switching the impedance of the impedance circuitry means to RF frequency.