中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

292 records (took 0.032 seconds)

    Quadrature sub-harmonic frequency up-converter and down-converter
    54.
    发明公开
    Quadrature sub-harmonic frequency up-converter and down-converter 有权
    AufwärtswandlerundAbwärtswandlerfüreine subharmonische Quadraturfrequenz

    公开(公告)号：EP1855378A1

    公开(公告)日：2007-11-14

    申请号：EP07107570.9

    申请日：2007-05-04

    Applicant: M/A-COM, INC.

    Inventor： Carrez, Frederic

    IPC: H03D7/16

    CPC classification number: H03D7/161

    Abstract: An apparatus for frequency down-converting a radio frequency (RF) signal to baseband and an apparatus for frequency up-converting a baseband signal to radio frequency (RF) in two steps using the two quadrature components of a single local oscillator. For the down converter (200), the RF signal is mixed with both components of the local oscillator signal (LO) in a sub-harmonic mixer (204) to produce an intermediate frequency (IF) output signal having a frequency component at twice the local oscillator frequency minus the RF frequency, i.e., (2xLO)-RF = IF. The IF signal is next split into two and supplied to a quadrature mixer (206) that mixes the IF signal with the I component of the same local oscillator signal and separately mixes the IF signal with the Q component of the same local oscillator signal to produce an output signal comprising an I component and a separate Q component at baseband. In the up-converter (600), the baseband signal is split into two parts in quadrature with each other and supplied to a quadrature mixer (601) that mixes the one component of the baseband signal with the I component of a local oscillator signal at frequency F LO and separately mixes the other baseband component with the Q component of the same local oscillator to produce an intermediate frequency signal centered at the local oscillator frequency and comprising two components, namely, an I component and a Q component. Next, the intemiediate frequency signal is mixed with both components of the same local oscillator signal in a sub-harmonic mixer (605) to produce a radio frequency output signal having a frequency component at three times the local oscillator frequency minus the baseband frequency.

    Abstract translation: 一种用于将射频（RF）信号降频到基带的装置和用于使用单个本地振荡器的两个正交分量的两个步骤将基带信号频率上变频到射频（RF）的装置。 对于下变频器（200），RF信号与子谐波混频器（204）中的本地振荡器信号（LO）的两个分量混合，以产生具有两倍频率分量的中频（IF）输出信号 本地振荡器频率减去RF频率，即（2xLO）-RF = IF。 IF信号接下来分为两部分，并提供给正交混频器（206），该正交混频器将IF信号与相同本地振荡器信号的I分量进行混合，并将IF信号与相同本地振荡器信号的Q分量混合，产生 输出信号包括基带处的I分量和单独的Q分量。 在上变换器（600）中，基带信号被分成正交的两部分，并提供给正交混频器（601），该正交混频器将基带信号的一个分量与本地振荡器信号的I分量混合 频率F LO并且将另一个基带分量与同一本地振荡器的Q分量混合以产生以本地振荡器频率为中心的中频信号，并且包括两个分量，即I分量和Q分量。 接下来，在子谐波混合器（605）中将同步本征振荡器信号的两个分量混合在一起，以产生具有三倍于本地振荡器频率减去基带频率的频率分量的射频输出信号。

    Apparatus and method to decrease signal amplitude peak-to-average ratio in a wireless communications system
    55.
    发明公开
    Apparatus and method to decrease signal amplitude peak-to-average ratio in a wireless communications system 审中-公开
    装置和方法用于减少在无线通信工程系统峰均功率的比率

    公开(公告)号：EP1748572A3

    公开(公告)日：2007-10-31

    申请号：EP06117869.5

    申请日：2006-07-26

    Applicant: M/A-COM, INC.

    Inventor： Sarraf, Mohsen

    IPC: H04B1/707

    CPC classification number: H04B1/707 ,  H04B2201/70706

    Abstract: Apparatus and method to reduce signal amplitude peak-to-average ratio (PAR) in a wireless communications system are described. The apparatus may include a signal conditioning module (112) to receive a baseband signal. The signal conditioning module (112) may split the baseband signal along multiple paths (114,116), delay one or more of the paths, and combine the multiple paths (114,116) to form a conditioned signal (132) having lower signal amplitude PAR than the baseband signal.

    Subsampling module for measurement of power amplifier AM/AM and AM/PM non-linearity
    56.
    发明公开
    Subsampling module for measurement of power amplifier AM/AM and AM/PM non-linearity 审中-公开
    Unterabtastung-Modul zur Messung der AM / AM-和AM / PM-NichtlinearitätvonLeistungsverstärkern

    公开(公告)号：EP1835685A1

    公开(公告)日：2007-09-19

    申请号：EP07104304.6

    申请日：2007-03-16

    Applicant: M/A-COM, INC.

    Inventor： Ahmed, Walid Khairy Mohamed

    IPC: H04L27/36 ,  H03F1/32

    CPC classification number: H04L27/367 ,  H03F3/24

    Abstract: An apparatus and method for characterizing an amplifier (PA) transmitting a band limited signal using a sample of the input signal to the amplifier (PA) and a sample of the output signal from the amplifier, where the output signal is subsampled. The sub-sampling frequency is chosen such that images of the band limited signal do not overlap. The input signal and the output signal in a polar format are processed to determine characteristics such AM/AM and AM/PM conversion nonlinearities.

    Abstract translation: 用于将放大器（PA）的输入信号的样本和来自放大器的输出信号的采样（其中输出信号被二次采样）表征发射带限信号的放大器（PA）的装置和方法。 选择子采样频率使得频带限制信号的图像不重叠。 处理极性格式的输入信号和输出信号，以确定AM / AM和AM / PM转换非线性特性。

    Method for fabricating a MESFET and a MESFET
    58.
    发明公开
    Method for fabricating a MESFET and a MESFET 审中-公开
    Herstellungsverfahrenfüreinen MESFET和eES MESFET

    公开(公告)号：EP1806779A2

    公开(公告)日：2007-07-11

    申请号：EP07100057.4

    申请日：2007-01-03

    Applicant: M/A-COM, INC.

    Inventor： Winslow, Thomas Aaron

    IPC: H01L21/338 ,  H01L29/812

    CPC classification number: H01L29/812 ,  H01L29/0646 ,  H01L29/1029 ,  H01L29/1075 ,  H01L29/66848 ,  H01L29/66878

    Abstract: The method includes forming an n-type channel portion (28) in a substrate (20) and forming a p-type channel portion (34) in the substrate (20). A boundary (75) of the n-type channel portion (28) and a boundary (73) of the p-type channel portion (34) define an intrinsic region (72) in the substrate (20).

    Abstract translation: 该方法包括在衬底（20）中形成n型沟道部分（28）并在衬底（20）中形成p型沟道部分（34）。 n型沟道部分（28）的边界（75）和p型沟道部分（34）的边界（73）限定了衬底（20）中的本征区域（72）。

    Dual field plate MESFET
    59.
    发明公开
    Dual field plate MESFET 审中-公开
    MESFET mit zwei Feldplatten

    公开(公告)号：EP1798773A2

    公开(公告)日：2007-06-20

    申请号：EP06126396.8

    申请日：2006-12-18

    Applicant: M/A-COM, INC.

    Inventor： Winslow, Thomas Aaron

    IPC: H01L29/812 ,  H01L29/40

    CPC classification number: H01L29/812 ,  H01L29/404

    Abstract: A dual field plate MESFET (90) and method of forming a MESFET. The MESFET (90) includes a gate electrode (100) and a drain electrode (96), with the gate electrode (100) and drain electrode (96) formed on a substrate (105). The MESFET further includes a gate side field plate (110) at the gate electrode (100) and a drain side field plate (112) in proximity to the drain electrode (96) and extending over a burnout improvement region in the substrate (105).

    Abstract translation: 双场板MESFET（90）和形成MESFET的方法。 MESFET（90）包括栅电极（100）和漏电极（96），栅电极（100）和漏电极（96）形成在基片（105）上。 MESFET还包括位于栅电极（100）处的栅极侧栅极（110）和靠近漏电极（96）的漏极侧场板（112）并延伸到衬底（105）中的烧尽改进区域上， 。

Patent Agency Ranking