公开(公告)号：US07577414B2

公开(公告)日：2009-08-18

申请号：US11044710

申请日：2005-01-27

申请人： Iuri Mehr

发明人： Iuri Mehr

IPC分类号： H04B1/06

CPC分类号： H03G3/3052 ,  H03G2201/706 ,  H04B1/26

摘要： In one aspect, an automatic gain control (AGC) for applying a variable gain to a broadband signal is provided. The AGC comprises a variable gain amplifier adapted to receive the broadband signal as an input, the variable gain amplifier configured to apply a variable gain to the broadband signal based on a value of a gain signal to provide an amplified broadband signal, and a controller to provide the gain signal to the variable gain amplifier, the controller adapted to determine the value of the gain signal based on at least one characteristic of the amplified broadband signal. In a further aspect, the one or more characteristic is a power characteristic of the broadband signal that facilitates control of the broadband signal within a desired power range.

摘要翻译： 一方面，提供了一种用于向宽带信号施加可变增益的自动增益控制（AGC）。 AGC包括适于接收宽带信号作为输入的可变增益放大器，所述可变增益放大器被配置为基于增益信号的值向宽带信号施加可变增益以提供放大的宽带信号，以及控制器 将增益信号提供给可变增益放大器，该控制器适于基于放大的宽带信号的至少一个特性来确定增益信号的值。 在另一方面，一个或多个特征是宽带信号的功率特性，其有助于在期望的功率范围内控制宽带信号。

公开(公告)号：US07342614B2

公开(公告)日：2008-03-11

申请号：US10850007

申请日：2004-05-20

申请人： Iuri Mehr ,  Sergei Nesterenko ,  Richard Schreier ,  David Robertson

发明人： Iuri Mehr ,  Sergei Nesterenko ,  Richard Schreier ,  David Robertson

IPC分类号： H04N5/50

CPC分类号： H04N5/50 ,  H03G3/3052 ,  H04N5/4401 ,  H04N5/46 ,  H04N21/42638 ,  H04N21/4383

摘要： Methods and apparatus for tuning are disclosed. One embodiment of the invention is directed to a tuner formed on a substrate. The tuner comprises a first die that receives an analog input signal and processes the analog input signal using analog processing circuitry to form analog output signals, and a second die that receives the analog output signals, converts the analog output signals to digital signals, and processes the digital signals to form output signals. Another embodiment of the invention is directed to a multi-chip module comprising a tuner adapted to process television signals of a plurality of types and of a plurality of standards to form output signals. A further embodiment of the invention is directed to a method that comprises receiving an analog signal from a signal source, filtering the analog signal to remove a portion of the analog signal, converting the analog signal to quadrature analog signals, converting the quadrature analog signals to digital signals, and filtering the digital signals to substantially isolate a channel of interest.

摘要翻译： 公开了调谐方法和装置。 本发明的一个实施例涉及一种形成在基板上的调谐器。 调谐器包括第一管芯，其接收模拟输入信号并使用模拟处理电路处理模拟输入信号以形成模拟输出信号;以及第二管芯，其接收模拟输出信号，将模拟输出信号转换为数字信号，并且处理 数字信号形成输出信号。 本发明的另一实施例涉及一种多芯片模块，其包括适于处理多种类型和多种标准的电视信号以形成输出信号的调谐器。 本发明的另一实施例涉及一种方法，其包括从信号源接收模拟信号，对模拟信号进行滤波以去除模拟信号的一部分，将模拟信号转换成正交模拟信号，将正交模拟信号转换成 数字信号，并且对数字信号进行滤波以基本上隔离感兴趣的信道。

公开(公告)号：US07394857B2

公开(公告)日：2008-07-01

申请号：US10698976

申请日：2003-10-31

申请人： Prabir C. Maulik ,  Paul M. Hendriks ,  Iuri Mehr

发明人： Prabir C. Maulik ,  Paul M. Hendriks ,  Iuri Mehr

IPC分类号： H04B3/00

CPC分类号： H04L25/028 ,  H04L25/0282 ,  H04L25/029

摘要： A versatile, programmable, low-cost transmit line driver is provided. The line driver includes a digital-to-analog converter that receives a digital input and provides an analog output. The line driver is reconfigurable between the voltage mode of operation.

摘要翻译： 提供了多功能，可编程，低成本的传输线驱动器。 线路驱动器包括数模转换器，其接收数字输入并提供模拟输出。 线路驱动器可在电压工作模式之间进行重新配置。

公开(公告)号：US20050259186A1

公开(公告)日：2005-11-24

申请号：US10850007

申请日：2004-05-20

申请人： Iuri Mehr ,  Sergei Nesterenko ,  Richard Schreier ,  David Robertson

发明人： Iuri Mehr ,  Sergei Nesterenko ,  Richard Schreier ,  David Robertson

IPC分类号： H03G3/30 ,  H04N5/44 ,  H04N5/46 ,  H04N5/50

CPC分类号： H04N5/50 ,  H03G3/3052 ,  H04N5/4401 ,  H04N5/46 ,  H04N21/42638 ,  H04N21/4383

摘要： Methods and apparatus for tuning are disclosed. One embodiment of the invention is directed to a tuner formed on a substrate. The tuner comprises a first die that receives an analog input signal and processes the analog input signal using analog processing circuitry to form analog output signals, and a second die that receives the analog output signals, converts the analog output signals to digital signals, and processes the digital signals to form output signals. Another embodiment of the invention is directed to a multi-chip module comprising a tuner adapted to process television signals of a plurality of types and of a plurality of standards to form output signals. A further embodiment of the invention is directed to a method that comprises receiving an analog signal from a signal source, filtering the analog signal to remove a portion of the analog signal, converting the analog signal to quadrature analog signals, converting the quadrature analog signals to digital signals, and filtering the digital signals to substantially isolate a channel of interest.

摘要翻译： 公开了调谐方法和装置。 本发明的一个实施例涉及一种形成在基板上的调谐器。 调谐器包括第一管芯，其接收模拟输入信号并使用模拟处理电路处理模拟输入信号以形成模拟输出信号;以及第二管芯，其接收模拟输出信号，将模拟输出信号转换为数字信号，并且处理 数字信号形成输出信号。 本发明的另一实施例涉及一种多芯片模块，其包括适于处理多种类型和多种标准的电视信号以形成输出信号的调谐器。 本发明的另一实施例涉及一种方法，其包括从信号源接收模拟信号，对模拟信号进行滤波以去除模拟信号的一部分，将模拟信号转换成正交模拟信号，将正交模拟信号转换成 数字信号，并且对数字信号进行滤波以基本上隔离感兴趣的信道。

公开(公告)号：US5786951A

公开(公告)日：1998-07-28

申请号：US658763

申请日：1996-06-05

申请人： David R. Welland ,  Richard T. Behrens ,  Iuri Mehr

发明人： David R. Welland ,  Richard T. Behrens ,  Iuri Mehr

IPC分类号： G11B5/09 ,  G11B20/10 ,  G11B5/035

CPC分类号： G11B20/10055 ,  G11B20/10009 ,  G11B20/10037 ,  G11B5/09

摘要： This invention provides apparatus and a method to assist in calibrating a read channel in a magnetic data storage system. More particularly, the invention provides a read channel including a digital noise generator. During a calibration procedure, the digital noise generator injects an analog noise signal into the read channel, thereby increasing the read channel's bit-error rate, and consequently allowing rapid calibration of the read channel. The digital noise generator comprises a number of linear feedback shift registers that together generate a pseudo-random digital word sequence, and a digital-to-analog converter that converts the pseudo-random digital word sequence into the analog noise signal. The digital-to-analog converter comprises a plurality of one-bit digital-to-analog converters whose outputs are summed by an analog adder. This configuration causes the analog noise signal to exhibit a binomial probability distribution which is close to a normal probability distribution for a sufficiently large number of linear feedback shift registers. The linear feedback shift registers are driven by a clock that operates at a higher frequency than the rate at which data is processed in the read channel. The analog noise signal, therefore, has bandwidth that is wider than that of the data, thereby insuring that calibration of the read channel includes effects due to aliasing. The digital noise generator is disabled while the read head passes over synchronization marks and embedded servo wedges.

摘要翻译： 本发明提供了一种辅助校准磁数据存储系统中的读通道的装置和方法。 更具体地，本发明提供了一种包括数字噪声发生器的读通道。 在校准过程中，数字噪声发生器将模拟噪声信号注入读通道，从而增加读通道的误码率，从而允许读通道的快速校准。 数字噪声发生器包括一起产生伪随机数字字序列的多个线性反馈移位寄存器，以及将伪随机数字字序列转换为模拟噪声信号的数 - 模转换器。 数模转换器包括多个1位数模转换器，其输出由模拟加法器相加。 该配置使得模拟噪声信号呈现二进制概率分布，其接近足够大数量的线性反馈移位寄存器的正态概率分布。 线性反馈移位寄存器由在读通道中处理数据的频率更高的时钟运行的时钟驱动。 因此，模拟噪声信号具有比数据宽的带宽，从而确保读通道的校准包括由于混叠引起的影响。 读取头通过同步标记和嵌入式伺服楔时，数字噪声发生器被禁用。

公开(公告)号：US20120146719A1

公开(公告)日：2012-06-14

申请号：US12930487

申请日：2011-01-07

申请人： Iuri Mehr ,  Sherif Galal ,  Todd L. Brooks

发明人： Iuri Mehr ,  Sherif Galal ,  Todd L. Brooks

IPC分类号： H03F1/00

CPC分类号： H03F3/187 ,  H03F1/305 ,  H03F3/72 ,  H03F2200/411 ,  H03F2203/7236

摘要： Disclosed is an amplifier designed to substantially reduce an ON/OFF transient. The amplifier comprises a drive block that includes a pre-driver and an output stage. The amplifier also comprises a bypass circuit that is coupled to an output of the pre-driver. The bypass circuit of the amplifier is selectively activated to reduce the ON/OFF transient. The bypass circuit may comprise an auxiliary output stage that can be coupled to provide selective activation. The amplifier may also be configured to provide multi-point offset compensation. Also disclosed is a related method. The amplifier and the related method may be incorporated into an audio amplifier used in a cellular telephone or other mobile audio device.

摘要翻译： 公开了一种设计用于大大减少ON / OFF瞬变的放大器。 该放大器包括一个包括一个预驱动器和一个输出级的驱动块。 放大器还包括耦合到预驱动器的输出的旁路电路。 选择性地激活放大器的旁路电路以减少ON / OFF瞬变。 旁路电路可以包括可以耦合以提供选择性激活的辅助输出级。 放大器还可以被配置为提供多点偏移补偿。 还公开了相关方法。 放大器和相关方法可以结合到用于蜂窝电话或其它移动音频设备的音频放大器中。

公开(公告)号：US06545534B1

公开(公告)日：2003-04-08

申请号：US09782242

申请日：2001-02-13

申请人： Iuri Mehr

发明人： Iuri Mehr

IPC分类号： H03F345

CPC分类号： H03G1/0088 ,  H03F3/68 ,  H03G9/06

摘要： A differential variable gain amplifier (VGA) with constant input impedance and an adjustable one-pole filtering characteristic is provided. Each input of the VGA has a set of parallel resistors connected thereto. Except for one resistor in each set, each of the resistors of the two sets is connected to its corresponding summing junction (op-amp input), or to a corresponding resistor of the other set via a switch. Switching the resistors to their corresponding summing junction or to the corresponding resistor of the other set provides for the variable gain function, where the gain is proportional to the number of resistors connected to the summing junction. The configuration of resistors provides a constant input impedance to the VGA of R/(n+1), where R is the resistance value of the resistors. In addition to the input resistor networks, the VGA comprises a fixed feedback resistance, along with a parallel capacitor array in the feedback paths of the differential op-amp to provide one-pole filtering of the input signal. To maintain the filtering characteristics constant for a change in the gain, the op-amp comprises an internal compensation network for adjusting the open-loop bandwidth of the op-amp.

摘要翻译： 提供具有恒定输入阻抗和可调单极滤波特性的差分可变增益放大器（VGA）。 VGA的每个输入端都有一组与之相连的并联电阻。 除了每组中的一个电阻之外，两组的每个电阻都通过开关连接到其对应的加法结（运算放大器输入）或另一组的相应电阻。 将电阻切换到其对应的求和点或另一组的相应电阻器提供可变增益功能，其中增益与连接到求和点的电阻数成正比。 电阻的配置为R /（n + 1）的VGA提供恒定的输入阻抗，其中R是电阻的电阻值。 除了输入电阻网络之外，VGA还包括一个固定反馈电阻，以及差分运算放大器的反馈路径中的并联电容阵列，以提供对输入信号的一极滤波。 为了维持增益变化的滤波特性恒定，运算放大器包括用于调整运算放大器的开环带宽的内部补偿网络。

公开(公告)号：US06005431A

公开(公告)日：1999-12-21

申请号：US126489

申请日：1998-07-30

申请人： Iuri Mehr ,  Paul F. Ferguson

发明人： Iuri Mehr ,  Paul F. Ferguson

IPC分类号： H03F1/30 ,  H03L5/00

CPC分类号： H03F1/303

摘要： A method and system for high bandwidth, high gain offset compensation in a read channel integrated circuit includes zeroing the analog read signal applied to the signal path at a first location in the read channel integrated circuit path prior to a first amplifier which has a first gain and a first bandwidth magnitude characteristic with a high frequency boost; coupling a signal from the first amplifier to a second amplifier which has a second gain larger than the first and a second bandwidth magnitude characteristic having high frequency roll-off; and further coupling the signal further from the second amplifier to a storage device and feeding back the signal stored in the storage device to the first amplifier to apply the high frequency boost of the first bandwidth magnitude characteristic to compensate for the high frequency roll-off of the second bandwidth magnitude characteristic; decoupling the signal from the storage device and removing the zeroing of the analog read signal applied to the signal path.

摘要翻译： 在读通道集成电路中用于高带宽，高增益偏移补偿的方法和系统包括：在具有第一增益的第一放大器之前，将在读通道集成电路路径中的第一位置处施加到信号路径的模拟读取信号归零 以及具有高频率提升的第一带宽幅度特性; 将来自第一放大器的信号耦合到具有大于具有高频率滚降的第一和第二带宽幅度特性的第二增益的第二放大器; 并进一步将信号从第二放大器耦合到存储装置，并将存储在存储装置中的信号反馈到第一放大器，以施加第一带宽幅度特性的高频提升，以补偿第 第二带宽幅度特性; 将信号与存储设备解耦并去除施加到信号路径的模拟读取信号的归零。

公开(公告)号：US06452444B1

公开(公告)日：2002-09-17

申请号：US09782666

申请日：2001-02-13

申请人： Iuri Mehr

发明人： Iuri Mehr

IPC分类号： H03K502

CPC分类号： H03H11/1291

摘要： A tunable, active RC filter and method of tuning the active RC filter which prevents distortions introduced during tuning. Generally, each tuning element in the feedback loop of the tunable active RC filter comprises a capacitor, a first switch, a second switch, and a third switch. The first switch connects a first terminal of the capacitor to a summing junction at the input of the op-amp when closed. When closed, a second switch connects the first terminal of the capacitor to a replica of the voltage present at the summing junction (input) of the op-amp to which the first terminal of the reactance element is connectable via the first switch. A third switch, when closed, connects the first terminal of the capacitor to the second terminal of the reactance element, which is connected the output of the op-amp. By connected the capacitor to the replica voltage via the second switch prior to connecting it to the summing junction at the input of the op-amp, the capacitor is pre-charged to the voltage it would have if present in the feedback path. Therefore, as the capacitor is pre-charged, the output voltage of the op-amp is not presented to the summing junction when the capacitor is switched in, which substantially eliminates the distortions caused by connecting the capacitors to the summing junction. The third switch is utilized to short the capacitor when it is disconnected from the summing junction.

摘要翻译： 可调谐的有源RC滤波器和调谐有源RC滤波器的方法，可防止调谐期间引入的失真。 通常，可调谐有源RC滤波器的反馈回路中的每个调谐元件包括电容器，第一开关，第二开关和第三开关。 当闭合时，第一开关将电容器的第一端子连接到运算放大器的输入端处的求和结点。 当闭合时，第二开关将电容器的第一端子连接到电抗元件的第一端子经由第一开关连接到的运算放大器的求和结点（输入端）处的电压的复制品。 第三开关闭合时，将电容器的第一端子连接到与运算放大器的输出端相连的电抗元件的第二端子。 在将电容器连接到运算放大器输入端的求和点之前，通过第二开关将电容器连接到复制电压上，电容器被预充电到反馈路径中将具有的电压。 因此，当电容器被预充电时，当电容器被切换时，运算放大器的输出电压不会呈现给求和点，这基本上消除了通过将电容器连接到求和点引起的失真。 当第三开关与加法连接断开时，电容器短路。

公开(公告)号：US06396429B2

公开(公告)日：2002-05-28

申请号：US09756306

申请日：2001-01-08

申请人： Lawrence A. Singer ,  Iuri Mehr

发明人： Lawrence A. Singer ,  Iuri Mehr

IPC分类号： H03M112

CPC分类号： H03M1/1245 ,  H03M1/167

摘要： An analog-to-digital converter including a quantizer and a residue generator, both of which sample an input voltage in parallel. The sampling characteristics of each of the residue generator and the quantizer are designed to substantially match one another. This converter may be used as a low-power ADC front-end circuit that does not require a dedicated sampleand-hold circuit. The front-end circuit consists of two substantially-matched sampling networks, one for the residue generator and the other for the quantizer, inside the first stage of the converter.

摘要翻译： 包括量化器和残留发生器的模数转换器，两者均并行地对输入电压进行采样。 每个残留发生器和量化器的采样特性被设计为基本上彼此匹配。 该转换器可以用作不需要专用采样和保持电路的低功耗ADC前端电路。 前端电路由转换器第一级内的两个基本匹配的采样网络组成，一个用于残留发生器，另一个用于量化器。