专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06803867B1 DC compensation circuit for direct conversion receiver 有权
标题翻译：直流补偿电路用于直接转换接收机
公开(公告)号：US06803867B1
公开(公告)日：2004-10-12
申请号：US10754425
申请日：2004-01-09
申请人： Kai-Cheung Juang
发明人： Kai-Cheung Juang
IPC分类号： H03M106
CPC分类号： H04B1/30
摘要： A DC offset compensation circuit for direct conversion receiver. The circuit compensates the DC offset generated by a direct conversion receiver, the DC offset generated by an amplifier. The present invention uses a combination of capacitor and active devices to generate a low cutoff frequency high pass response to compensate the DC offset.
摘要翻译：直流偏移补偿电路，用于直接转换接收器。电路补偿由直接转换接收器产生的直流偏移，由放大器产生的直流偏移。本发明使用电容器和有源器件的组合来产生低截止频率高通响应以补偿DC偏移。

2. 发明授权

US06791484B1 Method and apparatus of system offset calibration with overranging ADC 有权
标题翻译：具有超频ADC的系统偏移校准的方法和装置
公开(公告)号：US06791484B1
公开(公告)日：2004-09-14
申请号：US10623149
申请日：2003-07-18
申请人： Bumha Lee , Brian D. Segerstedt , Christina P. Phan
发明人： Bumha Lee , Brian D. Segerstedt , Christina P. Phan
IPC分类号： H03M106
CPC分类号： H03M1/1019 , H03M1/0695 , H03M1/44
摘要： A method and apparatus for system offset calibration using an overranging ADC is provided. The overranging ADC is configured to convert an analog signal into an intermediary digital signal. The conversion range of the overranging ADC is extended beyond the full dynamic range of the ADC system. The intermediary digital signal has more bits than the digital output signal. A digital fine offset adjustment circuit is configured to provide the digital output signal by digitally subtracting a fine offset from the intermediary digital signal and decoding the intermediary digital signal. The digital output signal has approximately no offset, and has approximately no loss in dynamic range.
摘要翻译：提供了一种使用超频ADC进行系统偏移校准的方法和装置。超频ADC被配置为将模拟信号转换为中间数字信号。超频ADC的转换范围扩展到ADC系统的完整动态范围之外。中间数字信号具有比数字输出信号更多的位。数字精细偏移调整电路被配置为通过从中间数字信号数字减去精细偏移并解码中间数字信号来提供数字输出信号。数字输出信号几乎没有偏移，在动态范围内几乎没有损耗。

3. 发明授权

US06747583B2 COMPENSATING CIRCUIT FOR USE IN A SWITCH CIRCUIT COMPRISING SCALED CURRENT STEERING SWITCHES, A SWITCH CIRCUIT COMPRISING THE COMPENSATING CIRCUIT, AND A METHOD FOR MINIMISING TIME-SKEW IN SWITCHING SCALED CURRENT STEERING SWITCHES 有权
标题翻译：包含电流转向开关的开关电路中的补偿电路，包括补偿电路的开关电路以及用于最小化开关量程电流转向开关中的时间轴的方法
公开(公告)号：US06747583B2
公开(公告)日：2004-06-08
申请号：US10184541
申请日：2002-06-28
申请人： Hans Juergen Tucholski , Anthony Lawrence O'Brien
发明人： Hans Juergen Tucholski , Anthony Lawrence O'Brien
IPC分类号： H03M106
CPC分类号： H03M1/06 , H03M1/745
摘要： “A compensating circuit for use in a switch circuit comprising scaled current steering switches, a switch circuit comprising the compensating circuit, and a method for minimising time-skew in switching scaled current steering switches” An eight bit current steering DAC comprising scaled current steering switches (ST0,SF0,ST(n−1),SF(n−1)) (where n=8) comprises a comprising plurality of compensating MOS switches (SCT0 and SCF0 to SCT(n−1) for minimising time-skew when switching selected ones of the current steering switches from one state to another. The compensating switches (SCT,SCF) are of type similar to the current steering switches (STi and SFi), and are sized so that the combined switching load presented to the corresponding driver circuit (Di) by the sum of the parasitic load capacitance of the current steering switch (STi or SFi) and the corresponding compensating switch (SCTi or SCFi) is substantially similar for each driver circuit (Di). Thereby, selected current steering switches (ST0 and SF0 to ST(n−1) and SF(n−1)) are simultaneously switched in response to simultaneously applied switching signals from the driver circuits (Di).
摘要翻译： “用于开关电路中的补偿电路，包括定标的电流转向开关，包括补偿电路的开关电路，以及用于最小化切换定标电流转向开关中的时间偏移的方法。”包括定标电流转向开关的八位电流转向DAC （ST0，SF0，ST（n-1），SF（n-1））（其中n = 8）包括包括多个补偿MOS开关（SCT0和SCF0至SCT（n-1）），用于最小化时间偏移将当前转向开关中选定的一个转换器从一个状态切换到另一个状态，补偿开关（SCT，SCF）的类型类似于当前的转向开关（STi和SFi），并且其尺寸使得组合的开关负载呈现给相应的通过电流转向开关（STi或SFi）和相应的补偿开关（SCTi或SCFi）的寄生负载电容之和的驱动电路（Di）对于每个驱动电路（Di）基本相似，由此，选择的电流转向开关响应于来自驱动器电路（Di）的同时施加的开关信号，同时切换（ST0和SF0至ST（n-1）和SF（n-1））。

4. 发明授权

US06731230B1 Method to smooth transitions in an ADC for current regulation 有权
标题翻译：平滑ADC转换的电流调节方法
公开(公告)号：US06731230B1
公开(公告)日：2004-05-04
申请号：US10071874
申请日：2002-02-08
申请人： Francisco Javier Guerrero Mercado , Gregory J. Smith , Yinming Chen , Igor Furlan
发明人： Francisco Javier Guerrero Mercado , Gregory J. Smith , Yinming Chen , Igor Furlan
IPC分类号： H03M106
CPC分类号： H03M1/48 , H03K5/082
摘要： The present invention is directed at providing methods in a circuit for smoothing transitions relating to a signal processing function. A reference signal is produced that relates to a DAC output code. The reference signal is used as a starting point, and is compared to the input signal. A feedback signal is produced that is used to adjust the reference. The invention can be used to implement signal processing functions such as peak detection, noise filtering, peak suppression, and the like, in which the transitions in the signal are smoothed. The invention can implement these functions with a minimal complexity and a minimal die area.
摘要翻译：本发明旨在提供用于平滑与信号处理功能有关的转换的电路中的方法。产生与DAC输出代码相关的参考信号。参考信号用作起点，并与输入信号进行比较。产生用于调整参考值的反馈信号。本发明可用于实现诸如峰值检测，噪声滤波，峰值抑制等信号处理功能，其中信号中的转换被平滑化。本发明可以以最小的复杂性和最小的模具面积来实现这些功能。

5. 发明授权

US06542101B1 Method and apparatus for performing analog-to-digital conversion using previous signal sample(s) 有权
标题翻译：使用先前信号样本进行模数转换的方法和装置
公开(公告)号：US06542101B1
公开(公告)日：2003-04-01
申请号：US09616158
申请日：2000-07-14
申请人： Arild Kolsrud
发明人： Arild Kolsrud
IPC分类号： H03M106
CPC分类号： H03M1/18
摘要： An analog to digital conversion (A/D) system produces a corrected output of an analog to digital (A/D) converter using at least one past signal sample. For example, the A/D system estimates a reference value or point, such as a reference amplitude, for the at least one past sample. In response to an indication that the A/D converter is saturated, the A/D system uses the reference value to predict a next reference value, such as a next amplitude value, from which a corrected digital sample value is produced to replace the saturating sample.
摘要翻译：模数转换（A / D）系统使用至少一个过去的信号样本产生模数（A / D）转换器的校正输出。例如，A / D系统估计至少一个过去样本的参考值或点，例如参考幅度。响应于A / D转换器饱和的指示，A / D系统使用参考值来预测下一个参考值，例如下一个幅度值，从其产生校正的数字采样值以代替饱和度样品。

6. 发明授权

US06535561B2 Dual-mode modulation systems and methods including oversampling of narrow bandwidth signals and DC offset compensation 有权
标题翻译：双模调制系统和方法包括窄带宽信号的过采样和直流偏移补偿
公开(公告)号：US06535561B2
公开(公告)日：2003-03-18
申请号：US09151996
申请日：1998-09-11
申请人： Ronald D. Boesch , Domenico Arpaia
发明人： Ronald D. Boesch , Domenico Arpaia
IPC分类号： H03M106
CPC分类号： H04B1/7101 , H03C3/40 , H04B1/707 , H04L27/2071
摘要： A narrow bandwidth signal, such as a narrowband FM signal, is modulated in a modulator that modulates a wide bandwidth signal, such as a CDMA signal, by oversampling the narrow bandwidth signal and applying the oversampled narrow bandwidth signal to the modulator. By oversampling the narrow bandwidth signal, the same fixed low pass filter can be used for both the wide bandwidth signal and the oversampled narrow bandwidth signal. Accordingly, different low pass filters or switched low pass filters are not needed. The DC offset that is introduced by the digital-to-analog converter and/or the low pass filter of the modulator is compensated, preferably in the digital domain, to thereby reduce DC offset within acceptable limits for the modulation that is being used. More preferably, compensation is provided by subtracting from the sampled signal, a digital value representing the DC offset in the filtered analog signal that is introduced by the digital-to-analog converter and/or the low pass filter. A sensor senses the DC offset in the filtered analog signal. An analog-to-digital converter is responsive to the sensor to convert the sensed DC offset into a digital offset signal. A subtractor is responsive to the analog-to-digital converter to subtract the digital DC offset signal from the sampled signal and to apply the sampled signal minus the DC offset signal, to the digital-to-analog converter.
摘要翻译：诸如窄带FM信号的窄带宽信号在调制器中被调制，该调制器通过对窄带宽信号进行过采样并将过采样窄带宽信号施加到调制器来调制诸如CDMA信号的宽带信号。通过对窄带宽信号进行过采样，相同的固定低通滤波器可用于宽带宽信号和过采样窄带宽信号。因此，不需要不同的低通滤波器或开关式低通滤波器。由数模转换器和/或调制器的低通滤波器引入的DC偏移优选地在数字域中进行补偿，从而将DC偏移降低到正在使用的调制的可接受限度内。更优选地，通过从采样信号中减去表示由数模转换器和/或低通滤波器引入的经滤波的模拟信号中的DC偏移的数字值来提供补偿。传感器检测滤波后的模拟信号中的直流偏移。模数转换器响应于传感器将感测的DC偏移转换成数字偏移信号。减法器响应于模数转换器从采样信号中减去数字DC偏移信号，并将采样信号减去DC偏移信号施加到数 - 模转换器。

7. 发明授权

US06512470B2 Method of voltage controlled oscillator digital/analog converted value adjustment of compact disk read only memory device 失效
标题翻译：压控振荡器数字/模拟转换值调节方法压缩盘只读存储器件
公开(公告)号：US06512470B2
公开(公告)日：2003-01-28
申请号：US09754059
申请日：2001-01-05
申请人： Hsiang Yi Fwu
发明人： Hsiang Yi Fwu
IPC分类号： H03M106
CPC分类号： H03L7/10 , G11B19/28 , H03L7/099 , H03L2207/06
摘要： A method of VCODAC adjustment of speed is disclosed. Values of a VCO digital/analog converter (VCODAC) generator according to the frequency of every speed are estimated at first, and then an output of a loop filter is used to on-line adjust the value to an optimum value. As the pick up head reads the same position, it need not be adjusted again. The reading ability of an optical disk drive is improved.
摘要翻译：公开了一种VCODAC调速方法。首先估算出VCO数字/模拟转换器（VCODAC）发生器根据每个速度的频率的值，然后使用环路滤波器的输出将值调整为最佳值。当拾音头读取相同的位置时，不需要再次调整。提高了光盘驱动器的读取能力。

8. 发明授权

US06496125B2 A/D conversion 有权
标题翻译： A / D转换
公开(公告)号：US06496125B2
公开(公告)日：2002-12-17
申请号：US09808218
申请日：2001-03-14
申请人： Bengt Erik Jonsson , Richard Hellberg
发明人： Bengt Erik Jonsson , Richard Hellberg
IPC分类号： H03M106
CPC分类号： H03M1/1004 , H03M1/12
摘要： An A/D converter system includes a first A/D converter with calibration circuitry. Also included in the system is an auxiliary A/D converter having a lower performance level than the first A/D converter. Circuitry is provided for temporarily switching an A/D conversion from the first A/D converter to the auxiliary A/D converter during short time intervals used for calibration of the first A/D converter. The rate at which the A/D conversion is switched is lower than the sampling rate of the first A/D converter.
摘要翻译： A / D转换器系统包括具有校准电路的第一A / D转换器。该系统还包括具有比第一A / D转换器更低的性能水平的辅助A / D转换器。提供电路，用于在用于校准第一A / D转换器的短时间间隔期间将A / D转换从第一A / D转换器临时切换到辅助A / D转换器。 A / D转换的切换速率低于第一A / D转换器的采样率。

9. 发明授权

US06480136B1 Modified repetitive cell matching technique for integrated circuits 有权
标题翻译：用于集成电路的改进的重复单元匹配技术
公开(公告)号：US06480136B1
公开(公告)日：2002-11-12
申请号：US09851658
申请日：2001-05-08
申请人： Rodney Louis Kranz , Charles D. Lane , David Jarman
发明人： Rodney Louis Kranz , Charles D. Lane , David Jarman
IPC分类号： H03M106
CPC分类号： H03M1/0678 , H03M1/36
摘要： An integrated circuit including a number of repetitive cells for producing output signals in response to respective inputs, each cell having associated with it an output circuit responsive to the cell output signal to produce an output circuit output signal, each of the output circuits including a circuit device having two terminals to provide for the flow therethrough of a current from an associated current supply and producing a corresponding output signal; the improvement for reducing the effects of cell mismatch and output circuit mismatch including an impedance network, having a set of impedance elements each connected between corresponding terminals or respective pairs of the circuit devices with each circuit device forming a part of a respective output circuit, the impedance elements reducing the effects of cell mismatch and output circuit mismatch on the output signals; there maybe one impedance network which accommodates mismatches in both the cells and output circuits or there may be one impedance network to accommodate cell mismatch and another to accommodate output circuit mismatch.
摘要翻译：一种集成电路，包括响应于各个输入产生输出信号的多个重复单元，每个单元具有与其相关联的输出电路，响应于单元输出信号以产生输出电路输出信号，每个输出电路包括电路具有两个端子以提供来自相关电流源的电流的流动并产生相应的输出信号; 用于减少电池失配和输出电路失配的影响的改进，包括阻抗网络，其具有各自连接在相应端子或相应电路装置对之间的一组阻抗元件，每个电路装置形成相应输出电路的一部分，阻抗元件减少电池失配和输出电路失配对输出信号的影响; 可能存在一个阻抗网络，其适应电池和输出电路中的不匹配，或者可以存在一个阻抗网络以适应电池失配，另一个阻抗网络适应输出电路不匹配。

10. 发明授权

US06456222B1 Sensor signal converter for machine tools and production machines, and also robots 失效
标题翻译：用于机床和生产机器的传感器信号转换器，以及机器人
公开(公告)号：US06456222B1
公开(公告)日：2002-09-24
申请号：US09922897
申请日：2001-08-06
申请人： Werner Agne
发明人： Werner Agne
IPC分类号： H03M106
CPC分类号： G08C19/02
摘要： The invention relates to a sensor signal converter for machine tools and production machines, and also robots, which generates pulsed signals from sensor values transmitted via a drive bus. The sensor signals (GU1, GU2) can be transmitted on the drive bus (AB1-AB4) in real time, can be converted into sensor-compatible pulsed signals by a sensor signal converter (GU1, GU2) in real time and can be sent to other appliances, optionally in real time. The data link (AB1-AB4) having real-time capability which can be used is an Ethernet having real-time capability.
摘要翻译：本发明涉及用于机床和生产机器的传感器信号转换器，以及机器人，其通过经由驱动总线传送的传感器值产生脉冲信号。传感器信号（GU1，GU2）可以在驱动总线（AB1-AB4）上实时传输，可以通过传感器信号转换器（GU1，GU2）实时转换为传感器兼容的脉冲信号，并可以发送到其他电器，可选地实时。具有实时能力的数据链路（AB1-AB4）可以使用具有实时能力的以太网。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式