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1. 发明授权

US07012979B2 Tone signal detection circuit for detecting tone signals 有权
标题翻译：用于检测音调信号的音频信号检测电路
公开(公告)号：US07012979B2
公开(公告)日：2006-03-14
申请号：US09942518
申请日：2001-08-29
申请人： Jörg Hauptmann , Thomas Pötscher , Michael Staber , Dietmar Straeussnigg , Hubert Weinberger
发明人： Jörg Hauptmann , Thomas Pötscher , Michael Staber , Dietmar Straeussnigg , Hubert Weinberger
IPC分类号： H04L7/00
CPC分类号： H04L27/1563 , H04L2027/0083
摘要： Tone signal detection circuit for a receiving circuit for detecting at least one tone signal of predetermined tone signal frequency (fE) 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 (VrefDC) and a periodic reference AC (VrefAC) having a variable fundamental frequency (fG), 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 (Vref); and comprising a digital control circuit (20) which adjusts the variable fundamental frequency (fG) of the reference signal (Vref) generated by the reference signal generator (42) in accordance with the predetermined tone signal frequencies (fG) 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.
摘要翻译：一种用于检测包含在接收的模拟输入信号中的预定音调信号频率（f SUB）的至少一个音调信号的接收电路的音频信号检测电路，包括：参考信号发生器（41），用于产生一个模拟转换器参考信号，该参考信号由具有可变基频（f SUB）的参考DC（V SUB refDC）和周期性参考AC（V SUB REFAC ），其叠加在参考DC上;模拟/数字转换器（11），用于根据模拟转换器参考信号（V SUB ref ）; 并且包括数字控制电路（20），其调整由参考信号发生器（42）产生的参考信号（V SUB ref）的可变基频（f SUB）根据要检测的音调信号的预定音调信号频率（f SUB）来评估由数字模拟/数字转换器（11）输出的数字数据流，用于检测对应于音调信号。

2. 发明授权

US06496128B2 Sigma-delta analog-to-digital converter array 有权
公开(公告)号：US06496128B2
公开(公告)日：2002-12-17
申请号：US10001022
申请日：2001-11-02
申请人： Andreas Wiesbauer , Hubert Weinberger , Martin Clara , Jörg Hauptmann
发明人： Andreas Wiesbauer , Hubert Weinberger , Martin Clara , Jörg Hauptmann
IPC分类号： H03M300
CPC分类号： H03M3/416
摘要： 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.

3. 发明授权

US07116159B2 Method and apparatus for adjusting an active filter 有权
标题翻译：用于调节有源滤波器的方法和装置
公开(公告)号：US07116159B2
公开(公告)日：2006-10-03
申请号：US10697418
申请日：2003-10-30
申请人： Christian Fleischhacker , Günter Koder , Francesco Labate , Michael Staber , Hubert Weinberger
发明人： Christian Fleischhacker , Günter Koder , Francesco Labate , Michael Staber , Hubert Weinberger
IPC分类号： H03K5/00
CPC分类号： H03H11/04
摘要： An adjustable filter, particularly for use as an antialiasing filter in digital telecommunications networks, includes adjustable capacitors which determine frequency response for the purpose of accurate alignment with a particular cut-off frequency. The active filter includes, in line with the invention, a control device with a measuring device for ascertaining the actual cut-off frequency of the filter. On the basis of the ascertained actual cut-off frequency of the filter and the information about the nominal cut-off frequency which is to be set, an adjustment parameter for the adjustable capacitor is selected from a memory arrangement. This adjustment parameter is used to adjust the adjustable capacitor such that the desired nominal cut-off frequency is obtained and, at the same time, the alignment is performed to achieve the nominal cut-off frequency with sufficient accuracy.
摘要翻译：特别是用作数字电信网络中的抗混叠滤波器的可调滤波器包括可调电容器，其确定频率响应以便与特定截止频率精确对准。根据本发明，有源滤波器包括具有用于确定滤波器的实际截止频率的测量装置的控制装置。基于确定的滤波器的实际截止频率和关于要设置的标称截止频率的信息，从存储装置中选择可调电容器的调整参数。该调整参数用于调节可调节电容器，使得获得所需的标称截止频率，并且同时执行对准以以足够的精度实现标称截止频率。

4. 发明授权

US06879273B2 Oversampling in analog/digital and digital/analog converters 有权
标题翻译：模拟/数字和数字/模拟转换器中的过采样
公开(公告)号：US06879273B2
公开(公告)日：2005-04-12
申请号：US10669280
申请日：2003-09-23
申请人： Andreas Wiesbauer , Martin Clara , Thomas Pötscher , Hubert Weinberger , Jörg Hauptmann , Thomas Magesacher
发明人： Andreas Wiesbauer , Martin Clara , Thomas Pötscher , Hubert Weinberger , Jörg Hauptmann , Thomas Magesacher
IPC分类号： H03M1/00 , H03M1/20 , H03M1/66 , H03M3/00 , H04B14/04 , H04B14/06
CPC分类号： H03M1/66 , H03M1/201 , H03M3/33 , H03M3/458 , H03M3/50
摘要： The invention creates a method and a device for digitally transmitting analog signals, in which oversampling is performed in analog/digital and digital/analog converters. In this arrangement, a digital/analog conversion is performed which, in particular, is suitable for VDSL systems. A transmitted digital transmission signal (110) is supplied to a mixing unit (201) and in the mixing unit (201), a receive noise signal (211) applied to a receive noise source terminal (209) is superimposed on the digital transmission signal (110). An interpolation filter unit (203), in combination with a subsequent noise shaping device (205), provides an increase in the frequency bandwidth, resulting in suitable oversampling.
摘要翻译：本发明创建了一种用于数字传输模拟信号的方法和装置，其中在模拟/数字和数字/模拟转换器中执行过采样。在这种布置中，执行数字/模拟转换，其特别适用于VDSL系统。传输的数字传输信号（110）被提供给混合单元（201）并且在混合单元（201）中，施加到接收噪声源终端（209）的接收噪声信号（211）被叠加在数字传输信号（110）。与随后的噪声整形装置（205）组合的内插滤波器单元（203）提供频率带宽的增加，从而导致合适的过采样。

5. 发明授权

US06646580B2 Digital/analog converter with programmable gain 有权
标题翻译：带可编程增益的数字/模拟转换器
公开(公告)号：US06646580B2
公开(公告)日：2003-11-11
申请号：US10012009
申请日：2001-10-29
申请人： Martin Clara , Hubert Weinberger , Christian Fleischhacker , Andreas Wiesbauer
发明人： Martin Clara , Hubert Weinberger , Christian Fleischhacker , Andreas Wiesbauer
IPC分类号： H03M100
CPC分类号： H03M1/66
摘要： 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 (Iref&phgr;), 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 currents a 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) and a 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).
摘要翻译：具有用于将数字输入信号（Dn）转换为模拟输出信号的可编程增益的数字/模拟转换器，所述数/模转换器（1）具有：用于施加数字输入信号（Dn）的信号输入（2）用于产生参考电流（Irefphi）的源（7），由参考电流源（7）输出的参考电流的电流强度可经由数字/模拟转换器（1）的设置端子（4）调节，电流镜像电路其以相关联的电流镜像比来反映所产生的参考电流（Iref），以形成镜像电流。可控开关器件（57）以取决于数字输入信号（Dn）的方式切换由电流镜电路输出的镜电流）存在于用于产生求和电流（Isum）的和电流节点（62）和用于将产生的求和电流（Isum）转换成相应的电流/电压转换器（17）的电流/电压转换器（17）电压（UA），通过数/模转换器（1）的模拟信号输出（3）作为模拟输出信号输出。

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