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    OVERSAMPLING IN ANALOGUE-DIGITAL AND DIGITAL-ANALOGUE CONVERTERS
    1.
    发明申请
    OVERSAMPLING IN ANALOGUE-DIGITAL AND DIGITAL-ANALOGUE CONVERTERS 审中-公开
    过采样模拟数字和数字模拟转换器

    公开(公告)号：WO02080370A2

    公开(公告)日：2002-10-10

    申请号：PCT/EP0103685

    申请日：2001-03-30

    Applicant: INFINEON TECHNOLOGIES AG ,  WIESBAUER ANDREAS ,  CLARA MARTIN ,  POETSCHER THOMAS ,  WEINBERGER HUBERT ,  HAUPTMANN JOERG ,  MAGESACHER THOMAS

    Inventor： WIESBAUER ANDREAS ,  CLARA MARTIN ,  POETSCHER THOMAS ,  WEINBERGER HUBERT ,  HAUPTMANN JOERG ,  MAGESACHER THOMAS

    IPC: H03M1/00 ,  H03M1/20 ,  H03M1/66 ,  H03M3/00 ,  H04B14/04 ,  H04B14/06

    CPC classification number: H03M1/66 ,  H03M1/201 ,  H03M3/33 ,  H03M3/458 ,  H03M3/50

    Abstract: The invention relates to a method and a device for the digital transmission of analogue signals, whereby an oversampling in analogue-digital and digital-analogue converters is carried out. A digital-analogue conversion is thus carried out which is particularly suitable for VDSL systems. A transmitted digital transmission signal (110) is supplied to a mixing unit (201). The digital transmission signal (110) is superimposed on a received noise signal (211), in the mixing unit (201) and applied to a received noise source connection (209). An interpolation filter unit (203), combined with a serial noise generation device (205), provides an increase in the frequency band width such that a suitable oversampling is achieved.

    Abstract translation: 本发明提供一种方法和用于模拟信号的数字传输装置，过采样在模拟 - 数字和数字 - 模拟转换器来执行。 在这里，一个数字 - 模拟转换被执行，这是特别适用于VDSL系统。 A发送数字发送信号（110）被提供给一个混合单元（201），其中，在所述混合单元（201）的数字发送信号（110）施加到一个接收噪声信号（211）被叠加在接收噪声源极端子（209）。 的内插滤波器（203）的化合物，连同随后的噪声整形器（205）的增加在制备，从而使合适的过采样，实现了频率带宽。

    Digital analog convertor with programmable amplification using a current to voltage convertor
    2.
    发明专利
    Digital analog convertor with programmable amplification using a current to voltage convertor 未知

    公开(公告)号：DE10053914A1

    公开(公告)日：2002-05-23

    申请号：DE10053914

    申请日：2000-10-31

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： WIESBAUER ANDREAS ,  CLARA MARTIN ,  WEINBERGER HUBERT ,  FLEISCHHACKER CHRISTIAN

    IPC: H03M1/66 ,  H03M1/70

    Abstract: The digital to analog convertor converts a digital input signal into an analog output signal. The D/A convertor (1) has a signal input (2) for the digital input signal. A reference current source (7) generates a reference current whose amplitude can be adjusted by a setting terminal (4) of the DAC (1). A current mirror circuit reflects the generated reference current by a corresponding ratio into a reflected current. A controllable switch device switches the reflected current in dependence on the input signal, through to a current summing node to generate a summed current. A current to voltage convertor (17) converts the summed current to a corresponding voltage which is output as an analog signal.

    3.
    发明专利
    未知

    公开(公告)号：DE50008004D1

    公开(公告)日：2004-11-04

    申请号：DE50008004

    申请日：2000-04-27

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： WIESBAUER ANDREAS ,  WEINBERGER HUBERT ,  CLARA MARTIN ,  HAUPTMANN JOERG

    IPC: H03M3/04

    Abstract: A sigma-delta analog-to-digital converter array including two cascaded sigma-delta modulators, the two sigma-delta modulators being multi-bit sigma-delta modulators. The sigma-delta analog-to-digital converter array is preferably a third order device and supplies a digital output signal corresponding to a sigma-delta converter with 7-bit quantization. To this end, a second order sigma-delta modulator with 3-bit quantization and a first order sigma-delta modulator with 5-bit quantization may be used.

    6.
    发明专利
    未知

    公开(公告)号：DE10121517A1

    公开(公告)日：2002-11-14

    申请号：DE10121517

    申请日：2001-05-03

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： FLEISCHHACKER CHRISTIAN ,  STABER MICHAEL ,  KODER GUENTER ,  WEINBERGER HUBERT ,  LABATE FRANCESCO

    IPC: H03H11/04 ,  H03J7/04

    Abstract: The invention relates to an adjustable filter (1), in particular for use as an anti-aliasing filter in digital telecommunications networks. For precise tuning to a specific cut-off frequency, said filter comprises adjustable capacitances (3) that determine the frequency response. If several cut-off frequencies are to be adjustable, the inventive active filter (1) comprises a control unit (9) with a measuring device (8) for determining the actual cut-off frequency of the filter (1). Using the actual cut-off frequency of the filter (1) that has been determined and the information concerning the set cut-off frequency to be adjusted, an adjustment rule for the capacitance (3) to be adjusted is selected in a memory device (10). The adjustment rule is used to adjust the capacitance (3) in such a way that the desired set cut-off frequency is obtained and tuning takes place simultaneously to obtain the set cut-off frequency with sufficient precision.

    8.
    发明专利
    未知

    公开(公告)号：DE10053914C2

    公开(公告)日：2003-05-22

    申请号：DE10053914

    申请日：2000-10-31

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： WIESBAUER ANDREAS ,  CLARA MARTIN ,  WEINBERGER HUBERT ,  FLEISCHHACKER CHRISTIAN

    IPC: H03M1/66 ,  H03M1/70

    Abstract: Digital/analog converter with programmable gain for converting a digital input signal (Dn) into an analog output signal, the digital/analog converter (1) having:a signal input (2) for applying the digital input signal (Dn)a reference current source (7) for generating a reference current (Irefphi), the current intensity of the reference current output by the reference current source (7) being adjustable via a setting terminal (4) of the digital/analog converter (1)current mirror circuits which mirror the generated reference current (Iref) with an associated current mirror ratio to form mirror currentsa controllable switching device (57), which switches through the mirror currents output by the current mirror circuits, in a manner dependent on the digital input signal (Dn) present at the signal input (2), to a summation current node (62) for generating a summation current (Isum) anda current/voltage converter (17) for converting the generated summation current (Isum) into a corresponding voltage (UA), which is output as an analog output signal via an analog signal output (3) of the digital/analog converter (1).

    10.
    发明专利
    未知

    公开(公告)号：DE10043160B4

    公开(公告)日：2009-11-26

    申请号：DE10043160

    申请日：2000-09-01

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： POETSCHER THOMAS ,  HAUPTMANN JOERG ,  STABER MICHAEL ,  WEINBERGER HUBERT ,  STRAEUSSNIG DIETMAR

    IPC: G01R23/02 ,  G08B1/08 ,  H04L27/00 ,  H04L27/14 ,  H04L27/156 ,  H04L27/26 ,  H04M1/654 ,  H04N1/333

    Abstract: Tone signal detection circuit for a receiving circuit for detecting at least one tone signal of predetermined tone signal frequency (f E ) which is contained in a received analog input signal, comprising a reference signal generator ( 41 ) for generating an analog converter reference signal which consists of a reference DC (V refDC ) and a periodic reference AC (V refAC ) having a variable fundamental frequency (f G ), which is superimposed on the reference DC, an analog/digital converter ( 11 ) for converting the analog input signal into a digital data stream in dependence on the analog converter reference signal (V ref ); and comprising a digital control circuit ( 20 ) which adjusts the variable fundamental frequency (f G ) of the reference signal (V ref ) generated by the reference signal generator ( 42 ) in accordance with the predetermined tone signal frequencies (f G ) of the tone signals to be detected and evaluates the digital data stream output by the digital analog/digital converter ( 11 ) for detecting a data pattern corresponding to the tone signal.

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